植物研究雑誌 J. J. Jpn. Bo t. 81: 81: 75-90 (2006)

Additions Additions and Corrections in Salicaceae of 2

Hiroyoshi Hiroyoshi OHASHI and Koji YONEKURA

Botanical Botanical Garden ，Tohoku University ，Sendai ， 980-0862 JAPAN E-mail: E-mail: ohashi@mai l.t ains.tohoku.ac.jp (Received on October 24 ， 2005)

The circumscriptions of Sa !i x shiraii Seemen and S. rup( 介。 ga Koidz. are clarified

by the sep 紅 ation of S. shiraii v紅 . kenoensis (Koidz.) Sugim. ，a plant of the Kanto Mountains Mountains and northeastern side of Mts. Yatsugatake. Sa !i x shiraii var. kenoensis was usually usually included in S. shiraii but sometimes misidentified as S. rup{ 斤'aga. Salix sieboldiana sieboldiana Blume has been generally recognized as a single polymo 中hic species ， but V 訂 . doi αna (Koidz.) H. Ohashi & Yonek. from southem Kyushu (Miyazaki and Kagoshima Prefectures) is recognized within the species. Three new nothosubspecies are

recognized recognized among the hybrids of S. vulpina Andersson: S αlix xampherist αC.， K. Schneid. nothosubsp. nothosubsp. yamatoensis (Koidz.) H. Ohashi & Yonek. ， S. xhiraoana Ki mura nothosubsp. nothosubsp. tsugaluensis (Koidz.) H. Ohashi & Yone k. and S. xsendaica Ki mura nothosubsp. nothosubsp. ultima (Koidz.) H. Ohashi & Yonek. (Continued (Continued from 1. Jpn. Bo t. 81: 35 -4 0， 2006)

Key words: Hybrids ，Japan ，nothosubspecies ，Salicaceae ，Salix.

The Salicaceae of Japan is compiled by from M t. Komagatake in the Ak aishi Ohashi (200 1). This paper as well as a previ- Mountains in . Both ous ous one (Ohashi and Y onekura 2006) intend species grow in rocky places of high to to revise the systematic works of J apanese montane to subalpine regions in northern and Salicaceae Salicaceae based on herbarium specimens central (Ohashi 200 1). Most plants kept kept mainly in TUS and TUS- K ，and our hitherto referred to S. shiraii from the Kanto field field studies in various places in J apan. In Mountains are different from the typical this this study herbarium specimens of KYO and form in having n訂 row leaves with persistent TI are also examined. hairs on the lower surface and shorter bracts. They approach S. rupifraga in these charac- 4.8α lix shiraii Seemen and S. rupifraga ters ，but ，when comparing female plants in Koidz. the same population ， they are easily distin-

Salix Salix shiraii Seemen is usually distin 聞 guishable from S. rup{ 介。 gαby the long stipe guished guished from S. rup 析。 ga Koidz. by the fea- of the ovary. Sa !i x shiraii has the ovary stipe tures tures of leaf blades ， bracts and longer ovary longer than the nectary against shorter or as stipe stipe (Figs. 1， 2). They are ，however ， often long as ， the nect 訂 y in S. rupij シ'aga. Also ， hardly hardly distinguishable from each other plants from northeastem side of Mts. mainly in the Kanto Mountains and Yatsugatake in N agano Prefecture and from Prefecture. Prefecture. M t. Akagi-san in Gunma Prefecture show Salix Salix shiraii was described from Nikko in the similar features to the Kanto Mountain Tochigi Tochigi Prefecture and S. rup{ 斤αga Koidz. variant of S. shiraii. The typical form of S.

-75- 76 76 植物研究雑誌第81 巻第2号 平成18 年4 月

from from the Kanto Mountain variant mentioned above. above. Ohashi (2000 ， 2001) treated S. kenoensis kenoensis as a synonym of S. shiraii. Here we follow Sugimoto's treatment (1 96 1) and adopt adopt the name S. shiraii var. kenoensis (Koidz.) (Koidz.) Sugim. for the Kanto Mountains vanan t. Salix Salix rupifraga is restricted to the northem Akaishi and disjunctively to a few localities in the . The typical typical S. shiraii (= S. shiraii va r. shiraii) shiraii) is distributed in the southem p訂 t of the the Owu Mountain Range (northward to Yamadera in Yamagata Prefecture ，south- ward to Mts. Nasu-dake in Tochigi Prefecture) ， the Nikko Mountains in Tochigi Prefecture Prefecture and northemmost Kanto Mountains Mountains in Gunma and N agano Prefec- tures. tures. Most records of S. rupifraga and S. shiraii shiraii from Kanto Mountains ， Mts. Akagi- san san and Haruna-san and the northeastern side of of Mts. Yatsugatake should be referred to S. Fig. Fig. 1. Salix shiraii Seeman (Nikko. Ki mura 535 ， shiraii va r. kenoensis (Fig. 4). TUS-K 9793) showing leaf-shape and long The taxonomic position of Salix shiraii ov 訂 y-s tI pe. V 紅 . kenoensis is controversia l. Kitamura and Murata Murata (1 979) classified S. kenoensis into the the section Helix of subgen. Salix ， because shiraii shiraii is confined to M t. Asama-yama and the male f1 0wers of the species from M t. t. M t. Kabutoiwa-yama in Saku-shi and Mts. Buko-san frequently have filaments connate

Myogi 田 san in the northem Kanto Mountains. at the base. In contrast ， Ohashi (2000 ， 2001) We have not find typical S. rupifraga from grouped Salix shiraii including S. kenoensis the the Kanto Mountains. and S. rupf 斤αga ， in section Hastatae of Koidzumi (1913) described Salix subgen. Vetrix ， which is characterized by the kenoensis kenoensis Koidz. based on a female speci- male f1 0wers with two free stamens. Connate men collected on M t. Buko-san in the Kanto stamens of S. kenoensis in M t. Buko-san are ， Mountains Mountains of Saitama Prefecture ， and a male however ，variable even within one catkin. specimen specimen from M t. Akagi-san. The former Specimens from the mountain ， e. g. ， was selected by Kimura (1962) as 1ectotype Hasegawa a & c，1 May 1980 (TUS) ， have of of the species (Fig. 3). Sugimoto (1 961) ne 訂 ly free stamens (Fig. 5). Moreover ， S. reduced reduced this species to a variety of S. shiraii japonica ，a member of sec t. Hastatae ， has based based on differences of leaf shape and de- stamens connate at the very base (Kitamura gree gree of pubescence. Kitamura and Murata and Murata 1979). Salix shiraii vぽ. (1 979) regarded S. kenoensis as a distinct kenoensis should be classified in sec t. species species endemic to M t. Buko-san. The Hastatae. female female f1 0wers and vegetative part of S. kenoensis kenoensis are ，however ，indistinguishable Apri12006 Apri12006 Journal of Japanese Botany Vo l. 81 No. 2 77

Fig.2. Fig.2. Salix rupifraga Koidz. (Komaki-mura. Huno s. n. ，TUS-K 8823). 78 植物研究雑誌第81 巻第2号 平成18 年4月

ぷ本珂 J 'j 6わ

Fig. Fig. 3. Sa !i x kenoensis Koidz. (M t. Buko. S. Matsuda 104 ，TI ，lectotype). Apr i1 2006 Journal of Japanese Botany Vo 1. 81 No. 2 79

glaucous glaucous when young ， but often slightly so so in mature; bracts elliptic to broadly elliptic ， 0.6-2.0 mm long; ovary stipe 0.5 -0 .8 mm long ， usually 0.8-2.0(-2.3)

mm long in fruit ， longer than bract ...・ H ・

...・ H ・. S. shiraii 38 ・N B. B. Blade of mature leaves elliptic or elliptic-obovate ， base rounded to cordate ， lower surface glabrous . …… va r. shiraii B. B. Blade of mature leaves elliptic ，ob- long long or oblong-obovate ， base mostly truncate truncate or shortly attenuate but often cordate cordate in a few lower leaves ， lower 一一 -36"N surface with persistent silky hairs at

least least along costa ...・ H ・.. var. kenoensis

Salix Salix shiraii Seemen in Bo t. Jahrb. Sys t. 30: 30: Beib l. 67: 40 (1901); H. Ohashi in J. Jpn.

08Okm Bo t. 75: 18 (2000) & in Sci. Rep. Tohoku む Univ. Univ. ser. 4，Bio l. 40: 325 (200 1). Type: JAPAN: Honshu ， Tochigi Pre f.， Nikko ， auf 13S"E 13S"E 140"E Felsen Felsen in 2000 m Honne (M. Shirai 42 ，43 ， May 1898 ，B-syntype ，isosyntype in TI; U. Fig. Fig. 4. Distribution of Salix shiraii va r. shiraii (cir- Faurie Faurie 2142 ， 27 May 1898 ， B-syntype ， cle) ， S. shiraii va r. kenoensis (triangle) and S. rupifraga rupifraga (diamond) in Honshu ， Japan. isosyntype in KYO). V 征. shiraii Japanese Japanese name: Shirai-yanagi. Distribution: Distribution: Japan. NE and Central A key to the species and variety discussed Honshu (Yamagata ， Miyagi ， Fukushima ， above above is given below: Tochigi and Gunma Prefectures ， also on Mts. Asama-yama and M t. Kabutoiwa-yama in A. A. Leaf blade ovate-oblong; base cuneate to ). Rocky cliffs or ledges rounded ， lower surface appressed- on upper montane to subalpine regions. Al t. pubescent pubescent at least along costa ， with 600-1000 m in Tohoku Dis t. and al t. 1000- raised raised veinlets when mature ， pale green 1700 m in Kanto Dis t. and N agano Prefec- or or slightly glaucous when young; bracts ture. widely widely oblong ， 0.6-0.8 mm long; ovary Specimens examined: JAPAN. HONSHU. stipe stipe usually less than 0.6 mm long ，less Yamagata Pref. monte Ryuzan (Yuki 4019 ， 12 June than than 0.8 mm long in fruit ，nearly as long 1938 ，TUS-K). Miyagi Pref. Nojiri (Murai 10 1. 27 Ju l. 1932 ，TUS-K); Syoto-toge (Ohashi s. n. ，24 Jun. 1960 ， as as bract ....・ H ・....・ H ・....・ H ・H ・H ・.. S. rupifraga A. A. Leaf blade ovate to elliptic-ovate ， base TUS); Shibata-gun ，Kawasaki-machi ，intter Aone et Gaga (Kimura 3079 ，3 Ju l. 1950 ，TUS-K); Gaga cordate cordate to cuneate ，shortly attenuate or (Ki mura 2388-2392 ，9 Jun. 1935 ，TUS-K); ibid. ， ca. rounded rounded or all cordate ， lower surface 1200 m (Sakai 840020-840024 ，840026 ， 12 May 1984 ， glabrescent glabrescent or pubescent ， usually with TUS); Katta-gun ，Zao-machi ， M t. Zao ， near Fudo-no- inconspicuous inconspicuous veinlets when mature ， t紘 i ，ca. 700 m (Sakai 8840012-840016 ， 12 May 1984 ， 80 80 植物研究雑誌第81 巻第2号 平成18 年4月

b c d

Fig. Fig. 5. Male flowers of Salix shiraii va r. kenoensis from specimens collected on M t. Buko- san. san. a: Hara s. n. (TUS-K). b ，c: Hasegawa b (TUS). d: Hasegawa d (TUS). Scale bar: 1 mm.

TUS); Fudodaki in M t. Zao (Sugaya s. n. ， 15 Aug. 840082-840097 ， 18 May 1984 ，TUS; Sakai & Endo 1960 ，TUS); M t. Zao ，Fubo (Y. Momiyama s. n. ， 15 840101-840114 ， 3 Ju l. 1984 ， TUS); Umagaeshi ， l. Ju l. 1936 ，TUS-K). Fukushima Pref. Nishishirakawa- Daiichi-irohazaka (Hassegawa 14994 ，14996 ， 14999 & gun ，Nishigo-mura ，Shinkashi ，700-800 m (Fukuoka & 15006 ， 11 Jun. 1995 ，KYO; Hassegawa 15001 ， 15004 Kurosaki Kurosaki 4651 ， 13 May 1989 ，TUS); Shinkashi-onsen ， & 15005 ， 11 Jun. 1995 ，TUS; Hasegawa 14232 & along along Abukuma-gawa River (Y oshioka s. n. ，26 Jun. 14233 ，8 May 1993 ，KYO); Nikko ， to upper stream of 1967 ，TUS); Nishigo-mura ， Kasshi Gorge (S. Suzuki Daiya River from Umagaeshi (Furuse s. n. ， 14 May 1582 ， 15 Ju l. 1933 ，TUS; S. Suzuki 2667 ，5 Jun. 1949 ， 1957 ，KYO); Nikko ，on the bank of the Inari River ， TUS); M t. Asahi-dake (C. Suzuki s. n. ， 14 Aug. 1934 ， below Unryu Valley (Seto 28633 ， 13 Jun. 1982 ，KYO ， TUS); below Kasshi Spa (Hara s.n. ， 25 May 1957 ，TI); TUS); Kegon (Kimura 535 ， 11 Jun. 1926 ，TUS-K); Kasshi-onsen Kasshi-onsen (S. Suzuki 181 ， 23 Jun. 1931 ，KYO); M t. Misawabasi (Kimura 540-542 ， 13 Jun. 1926 ，TUS-K). Kasshi-zan Kasshi-zan (1m 泊 s. n. ， Jun. 1915 ，KYO; lmai 3060 ，3 Gunma Pref. M t. Myogisan (Mizushima 11645 ，6 Sep. Jun. Jun. 1924 ，TUS-K; Saito 22 ，3 Aug. 1931 ，TUS-K). 1953 ， TI); Kanra-gun ，島 1yogi-cho ，Mts. 乱1yogi-san ， Tochigi Tochigi Pref. M t. Nasu (S. Suzuki 157 ， 21 Jun. 1931 ， M t. Hakuun-zan and M t. Kondou-san ， ca. 1000 m KYO; Saito 32 ， 12 Jun. 1932 ，TUS-K); Nasu ， prope (Sakai 840050 ， 20 May 1984 ，TUS); M t. Hakuun in fontem fontem calidum Ki taonsen (Kimura 3546 ，29 Aug. Myogi (Hisauchi 3000 ，29 Sep. 1940 ，TUS-K); the 1961 ，TUS-K; Kimura 3548 ，3549 ， 16 May 1984 ， border between Gunma and Nagano Prefs. M t. TUS-K); M t. Takahara-yama (Num 吋iri 6， Apr. 1915 ， Hanamagari-yama (Satomi s. n. ，22 Ju l. 1957 ， TUS). TUS-K); Shioya-gun ，Kuriyama-mura ， Hinata (Sugaya Nagano Pref. Kitasaku-gun ， Karuizawa-machi ，be- 79 ，27 Ma r. 1936 ，TUS-K); Kuriyama-mura ，Setoai- tween Tomeoyama and Hanamagariyama (Hara s. n. ， kyo (Shimizu 8ι943 ，26 Jun. 1984 ，KYO ，TUS); 10 Jun. 1972 ，TUS fr. imma t.); M t. Hanamagari-yama ， Kuriyama-mura ，Nokado ，Ogotozawa (Shimizu 84- ca. 1500 m (Ikeda s. n. ，7 Jun. 1981 ，TUS); summit of 933 ， 25 Jun. 1984 ，KYO); Nikko-shi ，Misawa (Kubota M t. Hanamagari-yama ，ca. 1650 m (Hara & Kurosawa s. s. n. ， herb. NSM no. 515 ，24 May 1952 ，KYO ，TUS ， s. n. ， 15 Aug. 1975 ，TUS-K st r.; Ikeda s. n. ，26 Oc t. TUS-K); Umagaeshi (Furuse s. n. ， 14 May 1957 ， 2001 ，TUS); Komoro-shi ，M t. Asama-yama ，Hoenbo ， KYO ，TUS); lroha-zaka (Sakai & al. s. n. ， 19 May ca. 1900 m (Ikeda s .n. ， 22 Sep. 1980 ，TUS); Saku-shi ， 1984 ，TUS); ibid. ，1000-1100 m (Sakai & Endo 8401 M t. Kabutoiwa-yama ，Rosoku-iwa ， ca. 1300 m (Ikeda 56-58 ，3 Ju l. 1984 ，TUS; Sakai & Endo 840131 ，3 Ju l. s. n. ，9 Jun. 1982 ，TUS; Ikeda s. n. ，4 Jun. 1973 ，TUS ， 1984 ，KYO); ibid. ， near Sakae-bashi ，ca. 900 m (Sakai a right-hand branch only). April2006 April2006 Joumal of Japanese Botany Vo l. 81 No. 2 81

var. var. kenoensis (Koidz.) Sugim. ， New both surfaces brownish when young ， densely Keys Jap. Trees: 472 (1 961). pubescent ，when mature upper surface green ， SaUx kenoensis Koidz. in Bo t. Mag. glabrescent ， lower surface glaucous ，sparsely Tokyo 27: 265 (1 913); C. K. Schneid. in sericeous along costa ， often densely so ， Sarg. ， P l. Wilson. 3: 135 (1 916); Kimura in sometimes also sericeous along nerves ， Sci. Sci. Rep. Tohoku Univ. ser ，4 ，Bio l. 28: 37 lateral nerves 8-12 pairs ，veinlets usually (1962); (1962); Kitam. & Murata ，Co l. Illus t. Woody inconspicuous on lower surface. Flowers in l. Pl. Jap. 2: 310 (1 979). Type citation: late April to mid June. Male catkins 1.2-3.5 'Chitsibu 'Chitsibu (Musasi); Akagisan (Kodsuke)'. cm long ， 4-10 mm thick ， rachis densely Type: Type: JAPAN. Saitama Pref. (Prov. sericeous ，stipitate; stipe 2-7 mm long ， with Musashi) ，Chichibu ，[foot of] M t. Buko [by 1-3 leaves ， leaves often deciduous ， oblong

stream stream behind the mountain] (S. Matsuda or narrowly oblong 聞 ovate ， 2-20 mm long ，1- 104 ，[4] May 1901 ， TI fl. fem.) - Lectotype 7 mm wide ， subsessile ， upper surface designated designated by Kimura (in Sci. Rep. Tohoku glabrous or sparsely pubescent ， lower sur- Univ. Univ. ser ，4 ，Bio l. 28: 37 ， 1962). Gunma face densely sericeous; bract broadly elliptic- Pref. Pref. (Prov. Kotsuke) ， M t. Akagi-san (collec- ovate ， basal one often ovate ，0.5- 1. 1 mm tor tor unknown 52 ，6 May 1878 ， TI fl. masc. long ， densely sericeous ，ciliate ，cilia to 1.5 (syntype). - (syntype). mm long. Male flowers: nectary 1，adaxial ， SaUx rupifraga auc t. non Koidz.: Kimura ca. 0.5 mm long; stamens 2.2 -4 .0 mm long ， in in Satake & al.， Wild Flow. Jap. Woody Pl. free or often connate ， connate in various 1: 1: 46 (1 989) ， pro parte ，inc l. distr. Gunma; length from base. Female catkins 1.7 -4 .0 cm H. H. Ohashi in Sci. Rep. Tohoku Univ. ser. 4， long and 3.5-7.0 mm thick ，(2.0-)2.5-5.5 cm Bio l. 40(4): 326 (2001) ， pro parte ，inc l. long and 6-12 mm thick in fruit; rachis ， Gunma e distrib. et specim. e Gunma ， stipes ， basal leaves and bracts as male Saitama Saitama et Nagano ， Ikeda s. n. (TUS). catkins. Female flowers: ovary narrowly Japanese Japanese name: Chichibu-yanagi. ovoid ，0.5-1.2 mm long ， glabrous or rarely Y oung branches sparsely pubescent ， basal sparsely pilose ，stipitate ，stipe 0.5-0.8 mm portion portion densely sericeous; stipules usually long at anthesis ， style 0.2-0.5 mm long; absent absent but rarely present on vegetative shoot ， nectary 1，adaxial ，ca. 0.5 mm long. Capsules to to 6 mm long ，oblique ，entire or with an (excluding style and stipe) ovoid ， 2.8-3.6 obscure obscure tooth. Basalleaves on young branch: mm long ，stipitate ，stipe 0.8- 1. 8(-2.3) mm petiole petiole 0.5-6.0 mm long ，sericeous; blade long. ovate ，elliptic-obovate or oblong-ovate ， 1-5 Distribution: Japan. Honshu: Gunma ， cm long ，0 .4 -3.5 cm wide ， apex acute to Saitama ， Tokyo and Nagano Prefectures.

subacuminate ， base rounded or rounded 也 (the Kanto Mountains and NE. side of Mts. cordate ， margin serrulate or crenate-serrate ， Yatsugatake). Rocky cliffs or ledges of upper upper surface glabrescent ， lower surface upper montane to subalpine regions ， often densely densely to sparsely sericeous along nerves ， growing in limestone area ， al t. 600-1800 m. lateral lateral nerves 5-8(-10) pairs. Middle and Specimens examined: JAPAN. HONSH U. Gunma apical apical leaves: petiole 4-13 mm long ， Pref. Seta-gun ，F 吋imi-mura ， M t. Akagi (S. Suzuki sparsely sparsely sericeous or glabrescent; blade s. n. ， 23 May 1960 ，TUS-K); M t. Akagi-san ， around the the summit (Sakai 840467 ，840469 ，840472 ， 19 May oblong ， na 町 owly oblong or narrowly 1984 ，TUS); W. of M t. Kurobiyama in M t. Akagi oblong-ovate ， 4-11 cm long ，2.0-5.0(-5.5) (Hara s. n. ， 18 Sep. 1957 ， TI); M t. Haruna (Ikegami cm wide ， apex acuminate or acute ， base 500 ， 11 Aug. 1939 ，KYO); M t. Haruna ，Somadake rounded ， rounded-cuneate or shallowly (Mizushima 2353 & 2360 ， 15 Oc t. 1953 ， TI); M t. cordate ， margin regularly serrulate or serrate ， Haruna ， near Haruna Zinzya (Hisauchi 2120 ， 11 Ju l. 82 82 植物研究雑誌第81 巻第2号 平成 18 年4月

1937 ，TUS-K); M t. Arafune-yama (Kato s. n. ，Oc t. 1934 ，TUS-K); Hara s. n. ，24 May 1953 ，TI ，TUS); M t. 1954 ， TI); Tano-gun ，Nakazato-mura ， M t. Kanosan ， Buko ，1000 m (Yamazaki 3770 ，2 May 1955 ， TI); M t. Maruiwa ，750 m (J. Murata & al. 7396 ，30 Ap r. 1979 ， Buko ，1200 m ， limestone crevices (Shimizu 2519 ， TUS); M t. Kanosan ，Nakaiwa ，850 m (J. Murata & al. 2591 ， 18 Oc t. 1957 ，KYO). 7256 ，30 Ap r. 1979 ，TUS); M t. Kanosan ，600-1000 m (J. (J. Murata & al. 105250 ，20 May 1983 ，TUS). Nagano Salix rupifraga Koidz. in Bo t. Mag. Pref. Pref. Saku-shi ，Iwamurata ， ca. 700 m (Ikeda s. n. ，3 Tokyo 33: 121 (1 919); H. Ohashi in J. Jpn. Aug. 1987 ，TUS); Iwamurata ， ca. 650 m (Ikeda 1，3，29 Ap r. 1987 ，TUS); Saku-shi ， M t. Kabutoiwa-yama 、 Bo t. 75: 18 (2000) ，exc l. Ounma e distrib. & 1000-1368 m (Ikeda s. n. ，29 May 1996 ，TUS); M t. in Sci. Rep. Tohoku Univ. ser. 4，Bio l. 40: Kabutoiwa-yama ，Rosokuiwa ， ca. 1300 m (Ikeda s. n. ， 326 (2001) ，exc l. Ounma e distrib. et specim. 4 Jun. 1973 ，TUS ， exc l. right-hand branch); M t. e Ounma ， Saitama et Ikeda s. n. e Nagano Arafuneyama ，1100-1300 m (Ikeda s. n. ， 14 Aug. 1987 (TUS). Type: JAPAN. Honshu. Yamanashi & 30 Aug. 2000 ，TUS); M t. Arafuneyama (Ikeda Pref. Pref. (Prov. Kai): Higashi-Komagatake (0. 840522 ，26 Jun. 1984 ，TUS; Sakai 840518 ，26 Jun. 1984 ，KYO); Uchiyama ， ca. 1300 m (I keda s. n. ， 18 Koidzumi s. n. ，TI-holotype ，KYO & TUS- May 1980 ，TUS); Kitasaku-gun ，Mochizuki-machi ， K -isotype). Kasuga ， foot of M t. Tadeshina-yama ， ca. 1600 m Japanese name: Koma-iwa-yanagi. (Ikeda (Ikeda s. n. ， 17 Jun. 1981 ，TUS); Kasuga Gorge (Ikeda Distribution: Japan. Central Honshu s. s. n. ，20 May & 15 Ju l. 1990 ， 17 Jun. 1991 ， 16 Jun. (Nagano and Yamanashi Prefectures). Rocky 1996 ，TUS); ibid. ，1300-1500 m (I keda 4045 ，22 Oc t. 2004 ， TUS); Minamisaku-gun ， Yachiho-mura ， cliffs or edges on subalpine regions ， al t. Yachiho Heights (Ikeda s. n. ，20 Jun. 1997 ，TUS); 1000-1800m. Minamisaku-gun ，Minamiaiki-mura ， M t. Ogura-san Specimens examined. JAPAN: Nagano Pre f. (Ikeda (Ikeda 35006 ，26 May 2003 ，TUS); the summit of M t. Ki taazumi-gun ， Azumi-mura ， inter Kamikoti et Ogura-san ， ca. 2100 m (Hara s. n. ， 12 Aug. 1958 ， TI); Sawando (Kimura 1761 ，9 Jun. 1928 ，TUS-K); inter Minamisaku-gun ，Kawakami-mura ， Jyumonji Pass - Nagawado et Sawando (Kimura 1719 ， 10 May 1928 ， Mikuni Pass (Ikeda s. n. ，25 May 1986 ，TUS); near TUS-K); Sawando ， between Kamikochi and Shiroiwa Shiroiwa (Ikeda s .n. ，8 Jun. 1986 ，TUS); Azusayama. Shimashima ，1000 m (Horikawa 315 ，330 ， 17 Oc t. Shiraiwa ， supra 1800 m (Ohi s. n. ，22 Jun. 1930 ，TUS- 1953 ，KYO); prope Nakanoyu (Kimura 2419 ，TUS-K); K); K); Azusayama - Jyumonji Pass - Azusashiroiwa prope fontem callidum Shirahone (Terashima s. n. ， in (Ikeda (Ikeda s .n. ，30 Ju l. 1986 ，TUS); Jumonji-tohge - 1950 ，TUS-K); middle stream of Azusagawa ，on rock Azusashiraiwa ， ca. 1800 m (Hotta 12283 ，26 May at pathside (Koidzumi s. n. ， May 1928 ， KYO); 1963 ， KYO); Jumonji-touge - Benkei-iwa (Hotta Azusagawa Valley (Koidzumi s. n. ，2 Jun. 1928 & 19 10250 ，8 Aug. 1958 ，KYO); near the summit of Jun. 1940 ，KYO); M t. Kiso-ontake (Takeda s. n. ， not Azusashiraiwa ，1950 m (Furuse 43192 ， 21 Jun. 1965 ， dated ， TUS-K); M t. Kiso-ontake ， near Takenoyu KYO). Saitama Pref. Chichibu ， Jumonji-toge (Okamoto s. n. ， 13 Sep. 1930 ，KYO); Suwa-gun ， (Inokuma 1038 ，6 Ju l. 1931 ，TUS-K); on the way to F可imi-machi ，Kamanashidani ，Dogasawa (I keda s. n. ， Jumonji-toge Jumonji-toge (Momiyama 3055 ，6 Ju l. 1937 ，TUS-K); 9 Sep. 1990 ，TUS); Kamiina-gun ，Miwamura ，Todai ， Chichibu-gun ， Ryogami-mura ， M t. Ryogami-yama ， Makuiwa ， 1400 m (G. Murata 8028 ，6 Sep. 1954 ， 600-1724 m (Iketsu & al. 1768 ，1769 ，25 May 1989 ， KYO); Miwa-mura ， Todai - Shiraiwa (Makuiwa) 一 TUS); M t. Ryogamiyama 一 Hatcho Pass ， ca. 1600 m Hatchozaka - Kitazawagoya (Mizushima s. n. ，5 Aug. (Hara (Hara s. n. ， 19 May 1956 ， TI); Chichibu-gun ， Mts. 1958 ，TUS); Kamiina-gun ，Hase-mura ，Todai ，below Mitsumine ， limestone crevices (Shimizu 02657 ， 19 Shiraiwa ， ca. 1150 m (Hassegawa 14948 & 14949 ，6 Oc t. 1957 ，KYO); Mitsumine ，Maeshiroiwa ， ca. 1600 May 1995 ，KYO); Hase-mura ，Todai ，Shiraiwa ，1200 m (Hara s. n. ， 14 May 1955 ， TI); M t. Buko (S. m (Shimizu 5516 ， 21 Sep. 1959 ，KYO); M t. Shiraiwa ， Matsuda 104 ，May 1901 ，TI ， Lectotype of Salix 1800 m (Shimizu 5640 ，20 Sep. 1959 ，KYO); M t. kenoensis kenoensis Koidz. selected by Kimura 1962); M t. Buko Senjo ，by Todai-gawa River (Koidzumi s. n. ， 10 Aug. (Furuse (Furuse TSM. no. 1163 ，22 Apr. 1955 ，KYO ，TUS); 1918 ，KYO); Kosetozawa (Koidzumi s. n. ， 16 Aug. t. M t. Buko-san (Koidzumi s. n. ，9 Ju l. 1930 ，KYO; 1918 ，KYO); Shimoina-gun ，Osika-mura ，Ogawara ， Hisauchi Hisauchi 90 ，91 ，29 Apr. 1934 ，KYO; Hisauchi 92 ，93 ， Tsubakuroiwa (Katumata 29 ，2 Aug. 1955 ，TUS-K). 29 Apr. 1934 ，KYO ，TUS-K; Hisauchi 531 ，1 Ju l. Yamanashi Pref. Ki takoma-gun ， Komaki-mura ， 1934 ，TI ，TUS-K; Hasegawa aーd，1 May 1980 ，TUS); Omugawa Gorge (Huno s. n. ，7 Jun. 1936 ，TUS-K - NW. middle slope of M t. Buko-san (Hara s. n. ，29 Ap r. holotype of Salix rup 許'G ga Koidz. var. eriocarpa Apri12006 Apri12006 Journal of Japanese Botany Vo l. 81 No. 2 83

Kimura); Kimura); Kitakoma-gun ， Hakushu-cho ， along pubescent ， with white ， and ovaries are Nakagawa ， upper tributary of the Kamanashi River ， pubescent with crisped hairs (Kitamura and 1500-1600 m (Shimizu 19983 ，26 Jun. 1970 ，KYO); Murata Murata 1979 ， Kimura 1989 ， Sakai 1995 ， Hakushu-cho ， Omu-gawa valley (Furuse 43069- 43071 ， 16 May 1965 ， KYO); Kitakoma-gun ， Ohashi 2000 ， 2001). Sugawara-mura ，ad ripas fl. Oziragawa (Huno 39 ，40 ， After examining many living and dried 4 Ju l. 1937 ，TUS-K); Nakakoma-gun ，M t. Higashi- specimens we noted that plants in koma-ga-take koma-ga-take (Ii shiba s. n. ， 11 Aug. 1926 ，TUS-K); Kagoshima and southem Miyazaki Prefec- Minamikoma-gun ，Misato-mura ，between Niikura and tures in southern K yushu are characterized Yushima (Koidzumi s. n. ，7 May 1939 ，KYO). by having narrower leaves of which the lower lower surface is not so s住ongly glaucous and 5. 5. Salix sieboldiana Blume male male flowers predominantly with one stamen Salix Salix sieboldiana Blume was described on (Figs. (Figs. 6 ，7). The plants 紅 e referable to Salix the the basis of a plant originally collected by tsukushiana tsukushiana Koidz. and S. doiana Koidz. Siebold Siebold in Japan and cultivated at Bogor Sakai Sakai (1 995) recognized three types of Botanic Botanic Garden in Java. The species was female female flowers in Salix sieboldiana of which originally originally characterized in having glabrous those those wi th the “Satsuma-yanagi" type are oblong oblong leaves with acuminate apex ， rounded common in lowlands of Kagoshima base ， se 町 ate margin ， a glaucous lower Prefecture Prefecture southward to Is 1. Tanegashima. surface surface and foliaceous stipules. Unfortu- Plants Plants intermediate between S. sieboldiana nately nately these characters hardly distinguish the and and S. doiana or S. tsukushiana are ，how- species species from many J apanese Salix. Many ever ， found frequently in the northeastern taxa taxa similar to S. sieboldiana had been added part part of Kagoshima and adjacent Miyazaki by Miquel (1867) and Seemen (1903) from Prefectures. Prefectures. There remains a problem Japan ， although Koidzumi (1913) considered whether whether they constitute a hybrid swarm the the species in a broad sense including those between between the two species or they show a geo- described described by Miquel and Seemen and graphical graphical cline in the regions. We recognize circumscribed circumscribed the typical form as S. S. S. doiana as a variety of S. sieboldiana. sieboldiana sieboldiana var. typica with “ stamina 2 raro The other taxa recognized by Ohwi (1953 ， 1 ，filamentis liberis vel alte connatis". Later 1965a ， 1965b) and Sugimoto (1 962 ， 1972) Koidzumi (1 919 ，1932 ， 1939) added some mentioned mentioned above are difficult to discriminate species species similar to S. sieboldiana. These taxa clearly. clearly. However ，there is a remarkable form have have been revised in later works. Ohwi of of Sα lix sieboldian αin Shikoku that is a tree (1 953 ，1965a ， 1965b) revised S. sieboldiana attaining attaining up to 8m tall. Salix sieboldiana is and and its relatives into three species: S. known to be shrubs or small trees at most up sieboldiana. sieboldiana. S. hα rmsiana Seemen and S. to to 4 m tall. Salix propitia Koidz. and S. buergeriana buergeriana Miq. Sugimoto (1961 ， 1972) sieboldiana sieboldiana var. shikokiana Koidz. were recognized recognized seven species: S. aridaensis found found in Shikoku ， but both were described as Koidz. ， S. doiana Koidz. ， S. tsukushiana shrubs. shrubs. Such characteristic habit of the Koidz. ， and probably S. propitia Koidz. (as Shikoku Shikoku population of S. sieboldiana is not his his e町oneous name) in addition to those rec- always always recognizable on herbarium specimens ognized ognized by Ohw i. However ， most recent or or even in field in Shikoku ， although some authors authors recognized S. sieboldiana as one specimens specimens collected in Shikoku are clearly single single polymo 中hic species characterized by recorded recorded as they were tall trees (4-5 m tall). male male flowers with one or two stamens of Flowers Flowers of such tree S. sieboldiana from which the filaments are connate to v紅 ying Shikoku Shikoku are ， however ， indistinguishable degrees degrees in one catkin and ovaries are from from those of S. sieboldiana in northern 84 植物研究雑誌第81 巻第2号 平成18 年4月

a g d e

Fig. Fig. 6. Fl ower mo 中hology of Salix sieboldiana var. doiana (a- f) and v訂 . sieboldiana (g-j). a -c: Male flower (Kimura 392 ，TUS-K 10005). d-f: Female flower (Kimura 263 ，TUS-K 10048). a， d: d: lateral view of a flowe r. b ，e: adaxial view of a ventral nectary. c ，f: abaxial view of a brac t. g， h: adaxial view of male flowers from a catkin (Kimura 471 ，TUS-K 10435). i ，j: Female flower flower (Kimura 276 ，TUS-K 10157). i: adaxial view of a flowe r. J: adaxial view of a bract show- ing ing dorsal nectary. Scale bar: 1 mm. Drawn from original sketches by H. Sakai on each specimen cited cited above.

Kyushu. Kyushu. Further studies seem to be needed Salix sieboldiana Blume ，B 討dr. Fl. Ned. to to clarify the form of tree S. sieboldiana and Ind. 10: 517 (1 825); Koidz. in Bo 1. Mag. also also mo 中hological variation and distinctness Tokyo 27: 93 (1 913) ，utη pica; H. Ohashi in within within S. sieboldiana complex. J. Jpn. Bo 1. 75: 19 (2000) & in Sci. Rep. Tohoku Univ. sec 1. 4，Bio l. 40 仕: 327 (2001). Key to the varieties of Salix sieboldiana: Typeι: v. v. Siebold ex J aponia missa et nunc in horto A. A. Stamens predominantly 1 per flower; botanico Buitenzorgii culta" (syntypes in L ， bracts bracts 1.5-2.0 mm long; mature leaf non vidi; photographs of syntypes in KYO). blade blade cuneate or shortly attenuate at V 紅. sieboldiana. base ， undersurface pale or slightly SaUx buergeriana Miq. in Ann. Mus. Bo 1.

glaucous glaucous ...・ H ・H ・H ・.....・ H ・.....・... var. doiana Lugduno-Batavi 3: 28 (1 867).

A. A. Stamens predominantly 2 per flower ， Salix said α， eana Seemen ，Salic. Jap.: 68 ，1. filaments filaments connate into 1 in various de- 17 (1 903) ， p. p. grees; grees; bracts 1. 0- 1. 5 mm long; mature Salix daiseniensis Seemen ，Salic. Jap.: 65 ， leaf leaf blade usually truncate or truncate- 1. 15 (1 903). cordate cordate at base ， undersurface promi- SaUx harmsiana Seemen ，Salic. Jap.: 73 ，1.

nently nently glaucous .…...・ H ・.. v征 . sieboldiana 18 (1 903). Apri12006 Joumal of Japanese Botany Vo l. 81 No. 2 85

Fig. Fig. 7. Salix sieboldiana Bl ume v紅 . doiana (Koidz.) H. Ohashi & Yonek. (Ijyuin. Doi s. n. ，TUS-K 2476). 86 86 植物研究雑誌第81 巻第2号 平成18 年4月

Salix Salix sieboldiana Blume var. sikokiana Kagamiganaru ， the entrance of mountain path to M t. Koidz. Koidz. in Bo t. Mag. Tokyo 27: 93 (1 913). K 訂 asugasen ，920-930 m (M. Suzuki & al. 45003 ，9 Salix Salix propitia Koidz. in Bo t. Mag. Tokyo May 2004 ，TUS); Kagamiganaru Moor ，ca. 920 m (M. Suzuki Suzuki & al. 45047 ，9 May 2004 ，TUS). Yamaguchi 27: 27: 266 (1 913). Pref. Abu-gun ，Atoo-machi ， M t. Nomichi-yama - Salix Salix aridaensis Koidz. in Acta Phytotax. Nomichi-tooge ，500-700 m (J. Murata 10867 ，1 May Geobo t. 8: 111 (1 939). 1981 ，TUS); Toyoura-gun ， Toyota-cho ， Takanoko

Salix Salix daiseniensis Seemen v紅. (Imada 7490 ， 7 Aug. 1984 ， TUS); Toyoura 田 cho ， rotundifolia rotundifolia Kimura in Bo t. Mag. Tokyo 59: Onigajo (Imada 4542 ，20 Ju l. 1980 ，TUS); Asa-gun ， Onoda-cho ， M t. Ryuo-zan (Nagatomi s. n. ， 16 Nov. 80 (1 946). 1935 ，TUS); Yamaguchi-shi ，Araya (Miyake s. n. ，4 For For other homotypic synonyms and fur- Jun. 1980 ，TUS). SHIKOKU. Ehime Pre f. Uma-gun ， ther ther bibliography see Ohashi (2000 ， 2001). Besshiyama-mura ， M t. Higashi-Akaishi ， in serpentine Japanese Japanese name: Yama-yanagi. area ， 1600-1700 m (M. Takahashi 2031 ，2032 ，2044 ， Distribution: Distribution: Endemic to Japan. W. 21 Jun. 1985 ，TUS); M t. Ishizuchi (M. Yamanaka s. n. ， Honshu (Kinki Dis t. and westward) ， Shikoku 7 Aug. 1966 ，TUS); Kamiukena-gun ， Saragamine (S. Yamamoto 12113 ， 21 Sep. 1966 ，TUS); Uma-gun ， and and Kyushu except most of Kagoshima Shingu-mura ， M t. Sanboshi-yama (S. Yamamoto Prefecture. Prefecture. Hillsides and montane grass- 12178 ， 29 Ju l. 1966 ， TUS); Yuzuhara-machi - lands ， forest margins from low lands to Hiyoshi-mura; around M t. Kokenzan ，300-500 m (J. montane reglons. Murata 15022 ， 11 Apr. 1983 ， TUS); Onsen-gun ， Representative Representative specimens examined. JAPAN. Kawauchi-cho ，Shirai Pass (Yamamoto 12489 ，5 May HONSHU. Wakayama Pref. Arita-gun ，Yawatamura 1966 ， TUS); Ochi-gun ， Tamagawa-cho ， Nibukawa (Okamoto 19213 ， 28 Apr. & 22 Sep. 1938 ，TUS-K fl. (Yamamoto 12279 ， 19 May 1963 ，TUS; Yamamoto masc. masc. & st r. - isosyntypes of Salix aridaensis Koidz.). 12409 ，5 Jun. 1960 ，TUS); Kamiukena-gun ，Kuma- Kyoto Pref. Takeno-gun ， Amino-cho ， Kobama - cho ，Saraga-mine ， 1030 m (Takahashi 2013 ，2015 ，4 Kakedzu ， 15 m (Tsugaru & al. 27099 ，2 Oc t. 1998 ， Jun. 1985 ， TUS). Kochi Pref. Kanbara-machi ， TUS). TUS). Hyogo Pref. Kawanishi City ， M t. Myoken-san ， Nakakawauchi (1. Murata 15001 ， 11 Ap r. 1983 ，TUS); 500 m (Kurosaki 12487 & 12488 ，1 May 1982 ，TUS); Takaoka-gun ，Kubokawa-machi ， above Morigauchi ， Shisou-gun ，Chigusa-cho ， S. foot of M t. Mimuro- 370 m (Tateishi & al. 16076 ，30 乱1ar. 1992 ，TUS); yama ，700-1000 m (Kurosaki & Imai 2175 ，2176 ， 27 Takaoka-gun ，Yusuhara-machi ， above Kubotani ，670 Ap r. 1997 ， TUS); Kanzaki-gun ， Ic hikawa-cho ， m (Tateishi & al. 15840 ，30 Mar. 1992 ，TUS); Kasagata-jinja Kasagata-jinja - summit of M t. Kasagata-yama ，600- Takaoka-gun ，Hidaka-mura ， Oritsuki (T. Yamanaka 940 m (Kurosaki 13229 ， 15 May 1983 ，TUS); Sayou- 52193 ， 14 Apr. 1968 ，TUS); Susaki-shi ，Hyora (T. gun ，Sayou-cho ， M t. Hinakura-san ，Onemidawa - the Yamanaka 36661 ， 10 Ap r. 1963 ，TUS); Kami-gun ， summit ，800-1000 m (Kurosaki 16354 ，16355 ，8 May Kahoku-machi ，Gozaishoyama (T. Yamanaka 42359 ， 1988 ，TUS); Yabu-gun ，Ooya-cho ，Sugigasawa ，700 m 29 Ap r. 1965 ， TUS); Muroto-si ， Kawachi (T. (Kurosaki (Kurosaki & Imai 1516 ，3 May 1993 ，TUS); ibid. ， Yamanaka 42212 ， 16 Apr. 1965 ，TUS); Aki-gun ， Um 司i-mura ，Naka River ， confluence of Ase-dani ，560 700 ー750 m (Hashimoto & al. 1351 ，2 May 1998 ， TUS); Kobe-shi ，Nada-ku ， around Gokuraku-chaya ， m (Noshiro & al. TWTw-20224 ，27 Apr. 2003 ，TUS); 700-800 m (Miyake 4562 ， 18 May 1996 ，TUS); M t. valley of Naka-gawa River ，SE foot of M t. Jinkichi- Rokko-san Rokko-san (Ui s. n. ， 23 Jun. 1929 ， TUS). Okayama mori ，870-880 m (Y onekura 10086 ， 27 Apr. 2003 ， TUS); SE slope of M t. Jinkichi-mori ，870 m (Noshiro Pre f. Atetsu ・gun ，Oosa-cho ， Furuya National Forest ， 709 stand ，780 m (Noshiro & al. TWTw-] 8438 ，2 Jun. & al. TWTw-20227 ，27 Ap r. 2003 ，TUS); Um 司i-mura ， 2000 ，TUS). Shimane Pref. ，Ooda-shi ， M t. Sanbe-san valley of Yasuda-gawa River ， near the gate of (Midorikawa (Midorikawa 2275 ， 16 May 1981 ，TUS); Oda-shi ， Tochidani Forest Road ， ca. 450 m (Y onekura 10038 ， Shigaku ， ca. 400 m (Oka 49926 ，3 Aug. 1986 ，TUS); 26 Apr. 2003 ， TUS). Kagawa Pref. Takamatsu-shi - Kanoashi-gun ， M t. Suzuno-ootani-yama (along the Sakaide-shi; Goshiki-dai (Shimamura & al. s. n. ， 11 Iriegawa Iriegawa stream) ，650-750 m (J. Murata 10985 ，2 May Ap r. 1973 ，TUS); Kagawa-gun ，Shionoe-machi ， M t. 1981 ，TUS). Tottori Pref. Seihaku-gun ，Daisen-cho ， Ohtaki-san (Hoshi 508 ， 29 Ju l. 1982 ， TUS). summit of M t. Daisen (Furuse s. n. ， 17 Ju l. 1966 ， Tokushima Pref. Miyoshi-gun ，Higashiiyayama-mura ， TUS); SW. slope of M t. Daisen ， along the Prefectural M t. Tsurugi-san (T. Yamanaka 52742 & 52753 ，20 Route Route #45 ， along Ichinosawa ，910-920 m (M. Suzuki Jun. 1968 ，TUS); M t. Tsurugisan ，Minokoshi ー the & al. 45026 ，9 May 2004 ，TUS); Hino-gun ，Kofu-cho ， summit ， 1500-1900 m (J. Murata 11233 ，11234 ，24 Apri12006 Apri12006 Joumal of Japanese Botany Vo l. 81 No. 2 87

Jun. Jun. 1981 ， TUS); M t. Tsurugi-san ， Minokoshi - 21 (1 932). Type: JAPAN: Kyushu. Nishijirnajinja Nishijirnajinja (Hoshi 421 ，Ju l. 1982 ，TUS); Miyoshi- Kagoshima Pref. (Prov. Satsuma) ，町 uin (Y. gun ， Yarnashiro-machi ， North side of M t. Doi 9， 12 Oct. 1928 ，KYO -lectotype desig- Noganoikeyama ，700-1000 m (J. Murata 11261 ，24 Jun. Jun. 1981 ，TUS); Kyobashira-toge (M. Yamanaka s. n. ， nated by Kimura 1981; TUS- K -isolecto- 5 May 1961 ，TUS); Oe-gun ，Misato-son ，M t. Okunono ， type). ca. ca. 1000 m (Ibaragi 51202009 ， 12 May 2002 ， TUS); Salix tsukushiana Koidz. in Bo t. Mag. Naka-gun ，Kizawa-son ， 1200 m (Deguchi & Tanabe Tokyo 33: 220 (1 919). Type: Japan. Kyushu. 7825 ， 27 Ju l. 1992 ， TUS). KYUSHU. Nagasaki Pref. G. Koidzumi s. n. (日. fem.). Ma r. 1918. (TI- Kitamatsuura-gun ， Sechibaru-cho ， Uenobaru-men ， holotype). holotype). Hiragawara ， ca. 510 m (Y onekura 92083 ， 27 Ma r. Leaves Leaves at middle or apical portion of cur- 1992 ， TUS); Sasebo-shi ， Tsutsui 四 cho ， ca. 260 rn (Yonekura (Yonekura 96266 ，8 May 1996 ，TUS); Eboshi-cho ， M t. rent branch: blade oblong or narrowly ob- Eboshi-dake ， ca. 560 rn (Yonekura 96189 ，5 May long ，m 紅 gin crenate-serrate ， upper surface 1996 ，TUS); Nishisonogi-gun ，Kinkai-cho ，Katagarni- green ，brownish- 0 1' white-pubescent when go ，M t. Katagarnidake ，250-260 rn (Yonekura 94109 ， young ，glabrescent when mature ， lower sur 同 25 25 Ma r. 1994 ，TUS); Nagasaki-shi ，surnrnit of M t. Iwaya-yama (Yonekura 95890 ， 17 Aug. 1995 ， TUS); face pale or weakly glaucous ‘ brownish or Koebara-machi ， sumrnit of M t. Iwaya-san (Yonekura whitish pubescent when young ，hairs persis- 95204 ，95205 ，5 Apr. 1995 ， TUS). Saga Pref. F吋It su- tent at least along costa ，lateral nerves 8-13 gun ， Tara-cho ， Tara ， Nakayarnagoe - Nakayarna p泊rs. Male flowers: bract elliptic ， 1.0-1.5 Carnpground ，700-710 rn (Y onekura & Hirano 98734 ， mm long ， pale brown throughout or dark 21 21 May 1998 ， TUS). Fukuoka Pre f. Fukuoka-shi ， M t. brownish brownish apically; stamen usually 1 ，rarely Sefuri-yarna ， ca. 950 rn (Oka 47233 ，8 Aug. 1982 ， TUS); Fukuoka-shi ， Hakozaki (Ic hikawa 201034 ， 14 flowers with 2 stamens mixed in basal pぽ t May 1928 ，TUS); Saikawa-rnachi ，M t. Kurarnochi- of catkin. Female flowers: bracts oblong or yarna yarna (Oka 46244 ，4 May 1981 ， TUS). Kumamoto oblong-ovate ， 1. 5-2.0(-2.5) mm long ，d 担~k Pref. Pref. Tamana-shi ， Yarnada (Harnada T-1219 ，5 Ap r. brown at apex; fruit stipe 0.5-1.2 mm long. 1967 ，TUS); Kikuchi-shi ， Horai (Yarnashiro 4380 ， 12 Japanese name: Satsuma-yanagi. May 1963 ，TUS); Aso-gun ，Oguni-rnachi ，M t. Waita- san san (Yarnashiro 1217-1219 ，6 May 1962 ，TUS); Aso- Distribution: Endemic to Japan. S. Kyushu rnachi ， Matoishi ， Matoishi-gen'ya ， 860-880 rn (Miyazaki and Kagoshima Prefectures). (Yonekura (Yonekura 95913 ， 18 Aug. 1995 ，TUS); Aso-rnachi ， Hillside slopes at low elevations. Futae Futae Pass (Yamashiro 4398 ， 27 Ap r. 1958 ，TUS; Specirnens exarnined: KYUSH U. Kagoshima Pref. Yarnashiro Yarnashiro 4371 ， 29 Ap r. 1960 ，TUS); Takarnori- Aira-gun ，Hayato-cho ， Hyokiyarna (Kirnura 398 ，413 ， rnachi ， Yarnanokuchi (Oka 45327 ， l7 Ju l. 1980 ， TUS). 414 & 1066 ，20 Ma r. 1926 ，TUS-K); inter Kareigawa Oita Oita Pree f.， M t. Haneyarna ， 1100 rn (Meyer & al. et Hyokiyarna (Kirnura 408 ，409 ，20 M 訂. 1926 ，TUS- 17366 ， 21 Nov. 1978 ， TUS). Miyazaki Pre f.， K); Kagoshima-shi ， prope Kagoshima (Kimura 1025- Nishiusuki-gun ，Hinokage-cho ， confluence of Mitate 1030 ，1032-1037 ， 15 Mar. 1926 ，TUS-K); Ijyuin (Y. Valley Valley and Kasarnatsu Valley ，980 rn (Noshiro & al. Doi s. n. Folia 12 Oc t. 1928 & Flores 24 Ma r. 1929 TWTw-21110 ， 29 May 2004 ，TUS); Higashiusuki-gun ， TUS-K); in colle Muregaoka (Murakami s. n. ， Mar. Shiiba-son ， Miyazaki Experirnental Forest of Kyushu 1926 ，TUS-K); Sakurazima (Masamune s. n. ，24 Ap r. Univ. ，990 rn (Noshiro & al. TWTw-17043 ，2 Oc t. 1925 ，TUS-K; Kimura 426 ，1086 ， 31 Mar. 1926 ，TUS- 1997 ，TUS); Kitagawa-son ，Hourigawa -M t. Okue- K); Ibusuki-gun ， Ei-cho ， near M t. Yahazu-dake ， yarna ，400-800 rn (1. Murata 9759 ，29 May 1980 ， Nigarachi-pass ，240 m (Maruyama s. n. ，2 Apr. 1981 ，

TUS). TUS). Kagoshima Pre f.， M t. Kirishirna ， near TUS); Kimotsuki-gun ，Uchinoura ・.cho ， E. slope of Hayashida-onsen Hayashida-onsen (Sugaya & Sohrna s. n. ，22 May Kano-dake H i11， ca. 160 m (Y onekura 10962 ，26 Mar. 1960 ， TUS). 2004 ， TUS); Uchinoura Town ， S. face of M t. Kunimi ， 650-680 650-680 m (Noshiro & al. TWTw-21014 ，29 Ma r. va r. doiana (Koidz.) H. Ohashi & Yonek. ， 2004 ， TUS); ibid. ， ca. 660 m (Noshiro & al. TWTw- comb. nov. 21005 ，29 Ma r. 2004 ，TUS); Sata-machi (Nishida s. n. ，

13 13 Dec. 1951 ，TUS); Sata 田 mati ， inter Izasiki et Salix Salix doiana Koidz. [in Doi ，Flo r. Satsum. Simadomari Simadomari (Sugaya & Sohma s. n. ， 23 May 1960 ， 2: 2: 103 (1 93 1)] in Acta Phytotax. Geobo t. 1: TUS); Is l. Tanegashima ， Nishinoomote City ， between 88 88 植物研究雑誌第81 巻第2号 平成 18 年4 月

Urada and Kunigami ，60-90 m (Maruyama & Nemoto Tokyo 40: 9 (1926) ， pro sp.; H. Ohashi in J. 22296 ， 221 M 町. 1982 ，TUS). Cultivated in Tokyo. In Jpn. Bo t. 75: 33 (2000) & in Sci. Rep. horto horto Koisikawensi culta. A. Ki mura 39 (TUS- K) & A. Tohoku Univ. se r. 4，Bio l. 40: 370 (200 1). Kimura s. n. 7 May 1924 (TUS-K) [probably from the authentic authentic living plant determined by Koidzumi as Salix Japanese name: Hirao-yanagi. tsukushiana tsukushiana Koidz.]. nothosubsp. tsugaluensis (Koidz.) H. Ohashi Ohashi & Yone k.， comb. et sta t. nov. 6. 6. Hybrids of Salix vulpina Andersson Salix xtsugaluensis Koidz. ， F l. Symb. Or.- Six Six hybrids are known between Salix Asia.: 33 (1 930) ， pro sp. [Type: Japan. vu かina and other species (Ohashi 2001). A Honshu. Aomori Pref.: Hirosaki. Faurie subspecies of subspecies S. 聞か ina ， subsp. alopochroa ， 2154. May 1898 (P-holo.)] = Salix integra is is recognized as distinct (Ohashi and Thunb. x S. vulj フina Andersson subsp. Y onekura 2006). Three of the hybrids are vulpina. presumed to be derived from S. vulpina Sα li. χ xtsug αluensis v征 . 1αt ザbliαKimura subsp. subsp. alopochroa as one paren t. They need in Sci. Rep. Tohoku Univ. ser. 4，Bio l. 19: to to be separated to distinct nothosubspecies. 189 ，fig. 2 (1952) [Type: Japan. Honshu. i. i. A hybrid between Salix caprea L. and S. Miyagi Pref. (Prov. Rikuzen): Sendai. A. vulpina vulpina Andersson Kimura 3078 (fol ふ 14 Oc t. 1949. (TUS-K- Salix Salix xsendaica Kimura is the name for a holo.)]. hybrid hybrid between S. caprea L. and S. vulj フina Japanese name: Tsugaru うranagi. Andersson Andersson subsp.ν ulpina. Salix xultima Koidz. Koidz. is considered to be a hybrid between iii. Hybrids between Salix udensis Trautv. Salix Salix caprea and S. vu 争ina subsp. & Mey. and S. vulpina Andersson alopochroa. alopochroa. A new combination becomes Salix xampherista C. K. Schneid. is pre- necess 紅 y for S. xultima Koidz. under S. sumed to be a hybrid between S. udensis xsend αica: Trautv. & Mey. and S. vulpina Andersson Salix Salix xsendaica Kimura in Sci. Rep. subsp. vulpina ， while Salix xyamatoensis Tohoku Imp. Univ. se r. 4，Bio l. 6: 196 Koidz. and S. xishikawae Kimura are re- (1 931); H. Ohashi in Sci. Rep. Tohoku Univ. garded as hybrids between S. udensis and S. r. se r. 4，Bio l. 40: 377 (2001). vu かina Andersson subsp. alopochroa J apanese name: Sendai ぅranag i. (Kimura) H. Ohashi & Y one k. A new nothosubsp. nothosubsp. ultima (Koidz.) H. Ohashi & nothosubspecific name is needed for the lat- Yone k.， comb. et sta t. nov. ter two hybrids. Salix Salix xultima Koidz. in Acta Phytotax. Salix xampherista C. K. Schneid. in Geobo t. 8: 111 (1 939) = Salix caprea x S. Sarg. ， P l. Wilson. 3: 175 (1 916) ， pro sp.; H. 聞か ina subsp. alopochroa. Ohashi in J. Jpn. Bo t. 75: 31 (2000) & in Sci. Japanese Japanese name: Kongo 七akko-yanagi. Rep. Tohoku Univ. se r. 4，Bio l. 40: 365 (200 1). ii. ii. Hybrids between Salix integra Thunb. Japanese name: Hakodate-yanagi. and S.ν ulpina Andersson nothosubsp. yamatoensis (Koidz.) H. Salix Salix xhiraoana Kimura is presumed to be iI Ohashi & Yone k.， comb. et sta t. nov. a hybrid between S. integra Thunb. and S. Salix xyamatoensis Koidz. in Bo t. Mag. vulj フina subsp. alopochroa. A hybrid be- Tokyo 39: 2 (1 925) [Type: Japan. Honshu. tween S. integra Thunb. and S. vulpina Nara Pre f. (Prov. Yamato): M t. subsp. subsp. vulj フina needs a new nothosubspecific Butsuryujigoye (sphalm. Butsuyujigoye) ， name. Kongosan. G. Koidzumi s. n. (fo l.). [cul t. in Salix Salix xhiraoana Kimura in Bo t. Mag. Horto Bo t. Kyoto Univ. ，Ju l. 20 ， 1928]. Apri12006 Apri12006 Journal of Japanese Botany Vo l. 81 No. 2 89

(KYO-lectotype (KYO-lectotype designated by Ki mura Bo t. Mag. Tokyo 33: 217-223. 1981)] ， pro sp. = S. udensis Trautv. & 一一 1932. Contributiones ad cognitionem florae Asiae Asiae Orientalis. Acta Phy t. Geob. 1: 11-33. Mey. x S.ν ul) フina Andersson subsp. 一一一 1939. Contributiones ad cognitionem florae alopochroa alopochroa (Kimura) H. Ohashi & Y onek. Asiae Orientalis. Acta Phy t. Geob. 8: 108-117. Salix Salix ωxishik vae Kimura in Sci. Rep. Miquel F. A. W. 1867. “Salicineae" in Prolusio florae Tohoku Imp. Univ. se r. 4，Bio l. 12: 100 iaponicae. Ann. Mus. Bo t. Lugd. ーBa t. 3: 24-30. (1937) (1937) [Type: Japan. Honshu. Hyogo. Prov. Ohashi H. 2000. A systematic enumeration of Japanese Settu: Settu: monte Rokkosan. E. Isikawa 2 (fl.). 23 Salix (Salicaceae). 1. Jpn. Bo t. 75: 1 -41. 一一一 200 1. Salicaceae of Japan. Sci. Rep. Tohoku Apr. Apr. 1935 (TUS-K-holo.)] S. udensis = Univ. ，4 ser. ，Bio l. 40(4): 269-396. Trautv. Trautv. & Mey. x S. vulpina Andersson 一一- and Y onekura K. 2006. Additions and subsp. subsp. alopochroa (Kimura) H. Ohashi & Corrections in Salicaceae of Japan 1. J. Jpn. Bo t. Yonek. 81: 35 -4 0. Japanese Japanese name: Yamato-yanagi. Ohwi 1. 1953. Salicaceae. Flora of Japan. pp. 395 -4 08. Shibundo ，Tokyo (in Japanese). 一一一 1965a. Salicaceae. Fl ora of Japan ， ed. English. References References pp. 361-369. Smithsonian Institution ，Washington Kimura A. 1962. Symbolae It eologicae XIX. Sci. Rep. D. C. Tohoku Univ. 4 se r. Bio l. 28: 37 -4 5 ，pls. 1-5. 一一一 1965b. Salicaceae. Flora of Japan ，revised ed. pp. 一一一 1989. Salicaceae. In: Satake Y. ，Hara H. ， Watari 462 -4 76. Shibundo ，Tokyo (in Japanese).

S. S. and Tominari T. (eds.): Wild Fl owers of Japan Sakai H. 1995. Notes on Sα， lix. 1. Sec t. Sieboldianae Woody Plants 1: 31-51 ， pls. 39-58. Heibonsha (1). Miyagi-no-shokubutsu (1 9 ・20): 1-1 1. (in Lt d. ，Publishe r. Tokyo (in Japanese). Japanese). Kitamura Kitamura S. and Murata G. 1979. Salicaceae. Coloured Seemen O. von 1903. Salices Japonicae. Gebruder ustrations I1l ustrations of Woody Plants of Japan 2: 303-340. Borntraeger ，Leipzig. Hoikusha Publishing Co. ，Lt d. Osaka (in Japanese). Sugimoto 1. 196 1. New Keys of Japanese Trees. 552 Koidzuini Koidzuini G. 1913. Spiciligium Salicum Japonensium pp. Rokugatsusha Pub. Co. Lt d. ， Osaka (in Novarum aut Imperfecte Cognitarum. I. Bo t. Mag. Japanese). Tokyo 27: 87-97. II. Bo t. Mag. Tokyo 27: 26 4- 一一一 1972. New Keys to the Woody Plants of Japan. 267. 267. 583 pp. Inoue-shoten ，Tokyo (in Japanese). 一一 1919. Contributiones ad floram Asiae Orientalis.

大橋広好，米倉浩司:日本産ヤナギ科植物の追加 と訂正 2 4. シライヤナギとコマイワヤナギ:シライヤ これもチチブヤナギに訂正する. ナギとコマイワヤナギは葉の形と毛の状態，壱の 5 .ヤマヤナギ:ヤマヤナギは北村・村田 大きさ，子房柄の長さで区別できるが，両種の中 (1979) の扱い以来本州和歌山県以西，四国，九 間的な形があり，チチブヤナギと呼ばれる. 州に広く分布する多形の 1 種と見られている.し Ohashi Ohashi (2000 ， 2001) はチチブヤナギをシライヤ かし，鹿児島県と宮崎県南部のヤマヤナギは 1 個 ナギに含めたが，これをシライヤナギの変種とし の雄蕊をもっ雄花が多く，やや大きな萄をもち， た杉本(1961) 説を受けいれたい.チチブヤナギ 成葉の葉身は基部が鈍形から鋭形で下面は淡緑色 については長谷川義人氏が Makino 牧野植物同好 からわずかに白色で基部には軟毛がある.この形 会誌第 3 号 (1983) i植物雑記 (2) 毛野国のヤナ は Koidzumi が Salix tsukushiana Koidz. ホソバヤマ ギ」に記述しておられ，大変参考になった.チチ ヤナギ (1919) および S. doniana Koidz. サツマヤ ブヤナギは関東山地と八ヶ岳の北東側に分布する. ナギ (1931 )と命名したものに相当する.地域的 Ohashi Ohashi (2000 ，2001) はコマイワヤナギが群馬， なまとまりのある変種として区別できると考える. 長野，山梨に分布するとしたが，群馬からの記録 6. 前報でサイコクキツネヤナギをキツネヤナ はチチブヤナギに訂正する.また， Ohashi (2001) ギの亜種として区別した (Ohashi and Y onekura で埼玉県 M t. Ryogami-san. Iketsu & al. 1768 (TUS) 2006). これに伴い Ohashi (2000 ， 2001) がキツ のものはコマイワヤナギとして引用されているが， ネヤナギを片親とする雑種として整理した 6 雑種 90 90 植物研究雑誌第81 巻第2号 平成18 年4月

種のうち 3 雑種種でサイコクキツネヤナギを片親 H. Ohashi & Y one k. ，および (iii) ヒラオヤナギ とする新雑種亜種を区別することが必要となった. (イヌコリヤナギ×サイコクキツネヤナギ)の雑 (i) ハコダテヤナギ(オノエヤナギ×キツネヤナ 種亜種にツガルヤナギ(イヌコリヤナギ×キツネ ギ)の l 雑種亜種としてヤマトヤナギ(オノエヤ ヤナギ) Salix x hiraoana Kimura nothosubsp. ナギ×サイコクキツネヤナギ) Sa !i x x ampherista tsugaluensis (Koidz.) H. Ohashi & Yonek. を認めた. C. C. K. Schneid. nothosubsp. yamatoensis (Koidz.) B. 終わりに，チチブヤナギとコマイワヤナギにつ Ohashi Ohashi & Y one k.， (ii) センダイヤナギ(パッコ いて深い関心をもって多数の標本を提供して下さっ ヤナギ×キツネヤナギ)の雑種亜種にコンゴウパッ た池田登志男氏(長野県佐久市)にお礼申し上げ コヤナギ(パッコヤナギ×サイコクキツネヤナギ) ます. Sa !i x xsendaica Kimura nothosubsp. ultima (Koidz.) (東北大学植物園)