Apex Established Established a Monotypic Section Sinosedum
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植物研究雑誌 J. J. Jpn. Bo t. 67: 67: 194-200 (1992) Notulae Crassulacearum Asiae Orientalis (1) Hideaki Hideaki OHBA Department Department of Botany ，University Museum ，University of Tokyo ， 7-3-1 7-3-1 Hongo ，Bunkyo ・ku ， Tokyo 113 JAPAN アジア産ベンケイソウ科植物の分類覚書 (1) 大場秀章 東京大学総合研究資料館生物系研究室 113 東京都文京区本郷 7-3-1 (Received (Received on November 2， 1991) 1) 1) Sedum section Sinosedum was regarded as a synonym of Sinocrassula. 2) The Chinese Hylotelephium Hylotelephium sieboldii was treated as a local variety with differences of inflorescences and flowers. 3) 3) Two new combinations of Orostachys malacophyllus (Pallas) Fischer were proposed. During preparation of a revision of the Asiatic As far as the description the species is quite species species of Sedum and its allied genera 1 have unique and greatly diversified from other species noticed noticed several noteworthy taxa as well as of Sedum. When 1 published a revisional system novelties. novelties. In this series of notes 1 want to publish of the subfamily Sedoideae (Ohba 1978) ，1 these. these. The abbreviation of herbaria follows suspended taxonomic evaluation of the species. Index Index Herbariorum ， Part 1: the Herbaria of the In 1987 1 had an opportunity to examine the World ， 8th edition ， edited by P. K. Holmgren et authentic specimen at Beijing (PE). Though 1 did l. al. (New York Botanical Garden ， 1990). not find the type and the cotype specimens ，1 could 1) 1) The idenuty of Sedum paoshingense Fu ，the 句'pe examine a single specimen which well agrees with species species of Sedum sect. Sinosedum Fu the description (Fig. 1). Then 1 have borrowed the Sedum paoshingense was described by Fu (1965) specimen from Beijing and observed floral based based on the collection from Baoxing (Paoshing) ， features. Sichuan Sichuan (Szechuan) ，S W China with several The plant can be described as follows: Leaves extraordinary extraordinary characters. By these characters Fu are oblanceolate ，flat ， extremely thick ， apex established established a monotypic section Sinosedum. acuminate with a prominent short point around 1 The section is characterized by having these such mm long ，sessile and spurless. as as extremely thick leaves ，compact corymbose Flowers (Fig. 2) always haplostemonous. C a1 yx inflorescences inflorescences similar to those of め1010 teleph ium ， thick ，basally ca. 1 mm connate ， lobes triangular and erect free carpels. Later Fu (1 984) added to subulate ， 2.8-3.5 mm long ，0.8- 1. 2 mm wide ， having having 5 stamens to the characteristics. apex obtuse or round ，suberec t. Petals free ， -194 一 August 1992 Journal of Japanese Botany Vo l. 67 No. 4 195 Fig. Fig. 1. Sedum paoshingense Fu (PE). 196 196 植物研究雑誌第67 巻第4 号 平成 4 年 8 月 subulate subulate or linear-lanceolate ， apex obtuse ，5-6 remains some doubt because 1 could not examine mm long ，1. 1- 1. 3 mm wide ，suberect at f1 ower- the type ， the section Sinosedum is regarded as a ing. ing. Stamens 5，alternipetalous ， always shorter synonym of Sinocrassula. And Sedum paoshin- than than peta 1. 4.5-5 mm long; filaments linear ， gense is treated reasonably as a synonym of erect; erect; anthers oblong-ovate with round apex ， ca. Sinocrassula indica ranging for west Himalaya 0.7 0.7 mm long ， deep red before dehiscence. Nectar- to C China and showing extremely wide range of scales scales rectangular-ovate ，5-6 mm long ， ca. 0.6 variation particularly in the vegetative features. mm wide. Ovaries free from base ，erect ， 4.8-5.5 Sinocrassula. A. Berger in Engler et Prantl ， mm long ，tapering toward apex ，stigmatic portion Nat. P f1.・ fam. 2 Au f1. 18a: 463 (1930) ， pro syn. located located at apex of ovaries ， ::!:: swollen; ovules exc 1. S. aliciae. Lectotype: Sinocrassul α， indica 14-18 14-18 in each locule. Seeds elliptic ， 0.7-0.9 mm (Decne.) Berger (Ohba 1978). long ，testa striate. Sedum sec t. Sinosedum Fu in Acta Phytotax. One of the noticeable external features is the Sin. Add. 1: 115 (1965) ， syn. nov. Type: Sedum leaves leaves with a prominent point at the apex ， though paoshingense Fu. Fu described the apex as acuminate. Besides the Sinocrassula indica (Decne) A. Berger ， op. cit. leaves ， the spread in f1 0rescences with conspicuous Sedum paoshinense Fu in Acta Phytotax. Sin. subulate subulate bracts and the haplostemonous f1 0wers Add. 1: 114 (1 965) ， syn. nov. with with subulate or linear-lanceolate petals agree with Specimen examined. SW China. Sichuan. those those of the species of Sinocrassula ，particularly Garlung Xian ，Puchang ， al t. 700 m (Unknown S. S. indic α. ， collector 14335 ， PE). The specimen examined agrees Fu's description and represents the species concerned. Though it 日 Fig. Fig. 2. Flowers of Sedum paoshingense Fu. a: flowe r. b: calyx-lobe. c: peta l. d: anthe r. e: ovaries. nectar-scale. f: nectar-scale. g: seed. X 10 ，except d，g X 20. August August 1992 Journal of Japanese Botany Vo l. 67 No. 4 197 2) 2) On the record of Hylotelephium sieboldii from this species has been known from a) cultivation China plants ， b) Shodoshima island ，Kagawa Prefecture One of the famous temperate Crassulaceae as in the Setonaikai Sea ，and c) some localities in ornamental ornamental plants ，Hylotell 句phium sieboldii (Sweet Toyama Prefecture ， the Japan Sea side of Honshu. ex ex Hook.) H. Ohba ， which has been known more The cultivated plants agree with the illustration commonly as Sedum siboldii ，was described from accompanied the original description (Curtis's Bo t. an introduced plant to Royal Botanic Gardens ， Mag. 89: t. 5358) ，and show a strong uniformity Kew ，from Japan by Messrs. Henderson (Hooker at least throughout J apan. 1863). 1863). This from Shodoshima shows also the uni- Fu (1984) reported the species to occur in China. formity and is hardly different from the cultivated This This is the first record of the native locality plants ， though Yuasa (1969) wrote the considerable outside outside of J apan. variability ，and the slight difference from the Recently Recently 1 have examined the voucher speci- cultivated plants. Yuasa also wrote the island mens deposited in PE. The specimens (Fig. 3) are is one of the native locality. Not only Yuasa several completely completely glabrous and nearly smooth ， having taxonomists assumed that the species spreaded out creeping creeping stems with branches of which the bases into cultivation from Shodoshima (Ohwi 1965a ， are are more or less bent. It is difficult whether 1965b ，Tomida 1973). the the terminal branch is a part of the main As regard the plant from Toyama Prefecture flowering flowering stem or one of the lateral branches ，and 1 have treated as the local variety (Ohba 1981) or also also whether all these lateral branches have arisen once a different species ， Hylotelephium ettyuense simultaneously simultaneously within the same year or no t. (Tomida) H. Ohba (Ohba 1977). As pointed out The leaves and flowers can be described as by Tomida (1 973) var. ettyuense has a tendency follows: follows: Leaves ternate ， broadly obovate or very to have subsidiary inflorescences from the axils of broadly broadly ovate ，1. 7-2 cm long ，1. 4-2 cm wide ， the upper leaves. The shape of the inflorescence round at apex ， broadly cunate at base ，and entire and leaves is different from that of var. sieboldii along along margins. Inflorescences terminal and also found in cultivation and Shodoshima. arising arising from axils of the uppermost ternate leaves ， The specimens collected from China more with with 30-40 ， semiglobose flowers. approach to var. ettyuense than var. sieboldii in Flowers Flowers 5・merous. Calyx is basally connate; having small semi-globose inflorescences and entire lobes lobes narrowly ovate or oblong-ovate with round leaves. However ， the Chinese plant differs from apex ， 1-1.3 mm long ，and suberect at flowering. both variaties in flowers; i. e. ， the petals large ， not Petals Petals broadly lanceolate or linear lanceolate well constricted versus small and constricted in var. with with round apex ，5-6 mm long ， 1.6-1.8 mm sieboldii and ettyuense ， ovaries attenuate versus wide ， margin entire. Stamens a little shorter than stipitate and nectar 開 scales oblong versus linear of petal-length ，anthers broad-elliptic. Nectar-scales them. The Chinese plant is reasonable to be re- oblong ， ca. 0.5 mm long ， ca. 0.3 mm wide. garded as a local variety and named var. chinense. Gynoecium attenuate; ovaries (including style) V ar. chinense was collected in Lichuan Xian ， 5.5-6 5.5-6 mm long ，tapering to styles attaining 1.5-2 Moudao near Shuanghe ， which is located near a mm long ， ovules about 26 in each locule. river joins the 加lodaoqi River ， the type tree of Before Before Fu reported H. sieboldii from China ， Metasequoia gかptostroboides H.H. Hu et Cheng 198 198 植物研究雑誌第67 巻第4 号 平成 4 年 8月 Fig. Fig. 3. Hylotelephium sieboldii var. chinense (type). August August 1992 Journal of Japanese Botany Vo l. 67 No. 4 199 / "-'-.._';'ー，ー、、-.- ノ 、、 。 d d 。。、 Fig. Fig. 4. Distribution of Hylotelephium sieboldii. Va r. chinense (China ，Hubei); va r. ettyuense (Japan ， Toyama Prefecture; the Japan Sea side); va r. sieboldii (J apan ，Shodoshima; the Setonaikai Sea). was found in Modaoqi ， a village near the river σig. Hylotelephium ettyuense (Tomida) H. Ohba in 4). 4). Bot. 恥1ag. Tokyo 90: 50 (1 977). Hylotelephium Hylotelephium sieboldii (Sweet ex Hook.) H. Specimens examined. Japan. Honshu. Toyama Ohba in Bo t. Mag. Tokyo 90: 52 (1 977); in J. Fac. Pre f. Zyoganjigawa (cul t. at Bo t. Gard. Univ. Sci. Sci. Univ. Tokyo ，Sec t. III ， 12: 165 (1978). Tokyo) (K. Enomoto in Oc t.