Far Eastern Species of Euonymus L. (Celastraceae): Additional Data on Diagnostic Characters and Distribution
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Botanica Pacifica. A journal of plant science and conservation. 2018. 7(2): 41–46 DOI: 10.17581/bp.2018.07209 Far Eastern species of Euonymus L. (Celastraceae): additional data on diagnostic characters and distribution Ivan A. Savinov1* & Nikolai A. Trusov2 Ivan A. Savinov1* ABSTRACT e-mail:[email protected] A critical analysis of morphological characters with special focus on degree of Nikolai A. Trusov2 va ria bility for closely related taxa allowed to justify the boundaries between re pre e-mail:[email protected] sen tatives of the Euonymus growing i the Russian Far East. Clear morphological charactersfor11specieswerefoundandakeyforspeciesidentificationinfield 1 con di tions is suggested. The species status for E. maximowiczianus, E. × miniatus, Moscow State University of Food Pro E. pau ciflorus, E. planipes, E. sacrosanctus and E. sieboldianus has been proved. duction, Moscow, 125080, Russia Keywords: Russian Far East, China, Korea, Japan, Euonymus, Celastraceae, morphological 2 Tsytsin Main Botanical Garden RAS, analysis, variability, hybridization, geographic distribution Moscow, 127276, Russia РЕЗЮМЕ Савинов И.А., Трусов Н.А. Дальневосточные виды рода Euonymus L. Manuscriptreceived:09.04.2018 (Celastraceae): дополнительные данные о диагностических признаках Reviewcompleted:10.10.2018 и рас про стра нении. Критический анализ морфологических признаков с Acceptedforpublication:30.10.2018 особым вниманиемкстепениихизменчивостипозволилобосноватьграницы Publishedonline:01.11.2018 между отдельными представителями рода Euonymus, распространенными на российскомДальнемВостоке.Выявленычеткиеморфологическиепризнаки для 11видовисозданключдляихполевогоопределения.Обоснованвидовой статус следующихтаксонов:E. maximowiczianus, E. × miniatus, E. pauciflorus, E. pla nipes, E. sac rosanctusиE. sieboldianus. Ключевые слова: российский Дальний Восток, Китай, Корея, Япония, Euonymus, Celastraceae, морфологический анализ, изменчивость, гибридизация, гео графическоераспространение From 15 to 16 species of Euonymus L. are known in the tedinMHA).Manyherbariumspecimenswereexamined flora of Russianow(Savinov2009,2011).Of them,11spe andre-identifiedthatallowedustospecifythedetailsof the ciese ar distributedintheRussianFarEast(Sakhalinisland, geographicaldistributionof species.Originaldatawereob- Amur region,PrimorskyiKrai,southernKurilIslands).In tainedduringfieldtripstoSakhalinislandandPrimorskyi the last taxonomical treatment of the genus Euo ny mus by Territory(SikhoteAlinmountain,southernpartof Khas- Ma (2001) who did not analyze speciments from Russian sanskydistrict)inJuly-August2007andSeptember-Octo- her ba ria, many species from Russia were treated as syno ber 2017. nyms to other species. As a result, Ma accep ted only 5 spe Taxonomy of species treated follows to International cies from the Russian Far East. According to Ma's opinion, plant name index (https://www.ipni.org/). Categories of E.a s cha linensis (F. Schmidt) Maxim. is polymorphic taxon types for all studied species are given according to the Leo that includes E. ma ximowicziana Prokh., E. planipes (Koehne) nova(1974). Koehne, E.a s cha linensis and E. × mini a ta Tolm.).Sameso- lutions wereappliedinthe"Floraof China"(Ma&Fun- RESULTS ston. 2008) Thus,thesearchforgooddiagnosticcharacters According to this treatment, we accept following 11 remains important for understan ding the diversity of the spe cies of Euo ny musintheRussianFarEast: genus Euonymus andforclarificationof geographicaldist- 1. Euonymus maackii Rupr. 1857, Bull. Phys.Math. Acad. ri bution of some taxa. Another prob lem discussed in this Sci. Petersb.15:358;Ma2001,Thaiszia–J.Bot.,11:182; paper is hybridization bet ween some species from Kalo ny Ka2006,NewFl.Korea(Lee)1:713;Ma,Funston2008, mus subgenus(E. macropterus, E.a s cha li nensis). Taxonomical Fl.China11:459. boundaries between closely re lated spe cies and status of Syntypi: "AmuraeflumenadostiiZeaeetBureae14VI hyb rid samples also remain questionable. 1855R.Maak","AmuraeflumenadostiumUssuriae4IX 1855R.Maak"(LE!). Ecology and distribution: In river valleys, on the slopes. MATERIALS AND METHODS Eastern Siberia(Dahuria);theRussianFarEast:AmurRiver The study is based on critical analysis of herbarium basin in Kha ba rovskyi Krai, western and southern parts of materialsfromLE,MW,MHA,MOSP,MW,KW,MSUD, Pri mors kyi Krai. Mongolia, northeastern re gions of China, VLA,NSandpersonalcollectionsfromtheregion(deposi- Korean Peninsula. ©Botanical Garden-Institute FEB RAS. 2018 41 Savinov & Trusov 2. Euonymus sieboldianus Blume 1827, Bijdr. Fl. Nederl. Typus et isotypus: "Prov. Ussuriae, Possjet, crescentes Ind.:1147;Ohwi1984,Fl.of Japan:604.–E. hamiltonianus fruticosisadclivosaxoso7VII1860K.Maximowicz"(LE!). Wall.sensuMa2001,Thaiszia–J.Bot.,11:165;Ka2006, Ecology and distribution: In the forests, forest edges. New Fl.Korea(Lee)1:715;Ma,Funston2008,Fl.China The Russian Far East: Southern Primorye (south of the 11:457,proparte. Bolshaya Ussurka River). Adjacent areas of China and Typus: "Japonia,P.F.Siebold"(L).Note: in the opi nion North Korea.Inthe"Newfloraof Korea"(KainLeeYong of Blakelock (1951), type specimen at Leiden belong to No: 2006 715)thephotographof E. ma xi mowicziana Prokh. E. ha mil to nianus Wall. s.l. (with opened capsules and 5-merous flowers with white Ecology and distribution: At the edge of the forests petals) is placed and entitled "E. sachalinensis (Fr. Schm.) in rivervalleys.TheRussianFarEast:SouthernSakhalin, Maxim.(incl.E. planipes(Koehne)Koehne)"! Moneron island, Iturup, Kuna shir. Japan, Korean Peninsula. Notes: The species has good morphological characters, Notes: Euonymus maackii and E. sieboldianus have Himala namely:theleavesarerhomboid-ellipticalorovate,along yan links and closely related to E. hamiltonianus Wall., with the margin are finely or doubly serrate; flowering shoots which theyareoftenunited.Forexample,Ma(2001)included 4–7.5cmlong;acapsule8–10mmindiameter,withroun- E. siebol dia nus Blume in the synonyms of E. hamiltonianus. ded-triangularwings2–4mminlength.FromE. sachalinen sis it differs habitually, having the appearance of a large 3. Euonymus pauciflorus Maxim.1859,Mém.Prés.Acad. sprawling shrub or a small tree. This species differs well Sci. Pétersb.Div.Sav.9:74(Prim.Fl.Amur.);Ka2006,New from E. planipes also by shape of wings on the capsule. Vo Fl. Korea(Lee)1:714.–E. verrucosus Scop. sensu Ma 2001, roshilov(1982)consideredE. maximowicziana a synonym of Thaiszia. –J Bot.,11:221;Ma,Funston2008,Fl.China11: E. planipes. 462,proparte. Syntypi: "Amurae, Poddale, silvarum frondosarum hu 7. Euonymus planipes (Koehne) Koehne 1906, Mitt. mido 19 V 1855 K. Maximowicz", "Amurae, Dzifuae, in Deutsch.Dendr.Ges.15:62;Ohwi1984,Fl.Jap.,revised cres centes fruticosis um solum arenosum VII 1855 K. Ma ed.: 605. – E. sachalinensis. (F Schmidt) Maxim. sensu Ma ximowicz"(LE!).Note: Both specimens are arranged on 2001,Thaiszia–J.Bot.,11:34. the same herbarium sheet. The species was described from cultivated specimens in Ecology and distribution: In the forest undergrowth, Ber lin, grown from seeds which were collected in Japan. usuallyonthewethabitats.TheRussianFarEast:valleyof Ecology and distribution: on the river valleys, on forest Amur RiverinKhabarovskiiKrai,PrimorskyiKrai(espe edges,ontheslopes.TheRussianFarEast:South-Western ciallyincentralandsoutherndistricts).North-easternre Sakhalin,southernKurilislands(Iturup,Kunashir).Japan gions of China, northern part of Korean Peninsula. (Hokkaido,Honshu),KoreanPeninsula. Notes: The species closely related to European taxon, Notes: The species is well distinguished by the follo wing E. veru r cosus Scop., from which it differs by densely pubes diagnostic characters: the leaves are oblong-obovate and cent leaves on both sides and the length of the pedicels of broad ly elliptic, along the margin they are large and sharply lateral flowersintheinflorescences.Bothtaxaarevicarious double-serrated;floweringshoots6–13.5cmlong;capsule spe cies, one in Europe and another in the Far East. 10–15 mm in diameter, with very short rounded wings 2–3mminlength(thefruitontheside,especiallyonthe 4. Euonymus alatus (Thunb.) Siebold 1827, Syn. Fl. herbariummaterial,usuallyhasaheart-shapedshape!).All Oecon. Jap.:49;Ohwi1984,Fl.Jap.,reviseded.:603;Ma studied samples collected in the south and west of Sakhalin, 2001, Thaiszia–J.Bot.,11:75,proparte,excl.sp.E. sac as wellasinthesouthernKurilislands(Iturup,Kunashir) rosancta aKoidz.;K 2006,NewFl.Korea(Lee)1:711;Ma, and defined by many collectors as E. yesoensis Koidz. (= Funston2008,Fl.China11:448. E. oxyphyllaMiq.)belongtoE. planipes. This mistake, appa Typus: "Japonia,nonproculNagasaki,Satsumae"(UPS). rent ly, is due to the fact that the E. planipes lobed capsule, Ecology and distribution: On the slopes and on the which has very short but noticeable wings, was considered rocks along the rivers, near sea coast, bushes, bamboo, asawinglessnon-lobed(sometimesslightlyangular,with nearhotsprings.TheRussianFarEast:SouthernPrimorye, anglesof 1mmwide)sphericalonesofE.