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TThhee JJaapapnaesneSeosciee tySociety ffoorr PPllanatnt SSyystsetmaetmicastics ISSN 1346-7S6S Acta Phytotax. Geobot. 56 (3) :261-263 (2005) ShortCommunication A New Locality inJapan ofAdonismultij7ora(Ranunculaceae) SHINGO KANEKO, YUJI ISAGI NOBUKAZU NAKAGOSHI and Graduate Sehootfor international Development and Cooperation, Hiroshima Uhivengi411-5-1 Kingamlyama, Higashi-ILlirosh i73mPa-8529, .tmpan The large populatio onfAdonis has been known from Hiroshim aPrefectur ew,estern Honshu, Japan. The Adonis species was fbrmerl ryegarded as A. ramosa. However ,based on the detailed examinations of fiowers and fi;ui ttsh,i sspecies is here identifi aesd A. multij7ora. This is the firs rteport ofA. multij7bra from western Honshu, Japan. Key words: Adonis multij7ora, Hiroshima Prefecture ,Honshu, Japan ,new locality The larg eAdonis population around [[laishaku-kyo aggregate frui atnd the number of achenes pcr aggre- Gorge, northeast ofHiroshima Prefecture w,as pre- gate ftui twere also examined in the six popula- viously considered to be A. ramosa Franch. (Yama- tions, including fbur Adonis species from other shita 1987, Kaneko et al, 2002, Hiroshim aPrefecturelocalit iien sJapan (Fi g1.) .Vbucher specimens are 2004), and this was becaus eA, ramosa was believed deposite dat Hiwa Museum of Natural History, to be the only Adonis species native to Japan (Ohwi Shobara, Hiroshima Prefecture. 1983). However, recent studies (Nishik a&w aIto Adonis multij7bra is morphologically similar to 1978, 1979, 2001, Nishikawa 1988, 1989a, 1989b) A. ramosa in having several branches with one have shown that the Japanes eAdonis consists of fiowe rper stern, with alternate leaf arrangement the fo11owin gfbur species; A. amurensis Regel & and leave swhich are glabrou sbut rarely hairy Radde, A. namosa, A. multij7bra Nishikawa & Ko. underneath (Nlshik a2r00v1v).a The two species dif: Ito (Nishikaw 1a989a) and A. shikokuensis fer from each other in terms of the ratio of sepal Nishikawa & Ko. Ito (Nishika &w alto 2001) .In lengt tho peta 1lengt thh,e shape of aggregate fimits, this report morphological characters offlowers and and particular ltyhe lengh ofaggregate imit sand the ftuit wsere examined to enable the exact deterrni-number of achenes per aggregate ffui tAdbnis mul- nation of the Adonis species in this area. tij7bra has sepals lf2-2f 3shorter than petal sw,ith To confirm the identificat iofo nthe Adonis spherical aggregate fruit sh,aving 35 achenes on species in Hiroshima Prefectur eth,e ratio of the average. On the other hand, A. numosa has sepals sepal lengt hto petal ]ength t,he ratio of aggregate nearly equal to petal sa,nd prolat espheroid aggre- frui tlength to width, the length ofaggregate fruit, gate fruit with 55 achenes (Nishika w1a988, and the number of achenes per aggregate frui wtere Nishikawa & Ito 2001). measured in the three populations ,The lengt hof The ratio of sepal lengt hto petal lengt hof NII-Electronic Library Service TThhee JJaapapnaesneSeosciee tySociety ffoorr PPllanatnt SSyystsetmaetmicastics 262 APG Vbl,56 Lengt hof aggegatefruit (mm) Number of echenes per aggregae fruit Popu[aio(nSpeciesi 5 10 15 rc ro 40 oo 80 100 1ro Hl (Hiros hpiopm.a) HaH2H3MlmeRlMAIsi H2 ( Hiroshi mpaop .) H3 ( Hiroshi mpaop ,) Ml( A,murciib)ra M2( A,mu"ifitu)e Rl( A.ramasa ) mp( A.ramosa ) Al( A. amurensie ) Sl(A. shJftokuensis) FIG ,1. A. Length ofaggregate fltii otfsAdonis spp. B. Number ofachenes pcr aggrcgatc ftui Atb.breviati oofnnisne poputation (sH1- H3: Taishaku-ky oGorge, Hiroshima Pre£, Ml: Ina ,Nagano Pref, M2: Katsuyama, Fukui Pref. ,Rl: Hachinohe, Aomori Pref, R2: Ina ,Nagano Pref. A,1: Nemuro, Hokkaido Pref. S,1 / Oteyo K,6chi Prefi )T,hirt yaggregate frui twesre examined in each pepulati oBno.x plets show median (lin e25)t,h and 75th pcrcentil c(sbox )10,th and 90th percentil e(swhiske arnds) outliers (point Dsi)ff.t;re nltettc r(sa- ci)ndicat esignrncant disparit iyn the mean values efboth groups (P < e.05, Scheffe' stest). Adonis species around Taishaku-kyo Gorge in (Environme Angteanc1y 2000, Hiroshima Prefecture Hiroshima Prefectur ewas 0,71 ± O,1O (rang Oe.:49 2004, Shimane Prefectur e2004), and not A, multi- - O.94 ,N - 90) ,and their lengt hwere 10,7 ± 2,16 .f7bra ,The presenc eofA. multij7bra in Hiroshima mm (rang e5.:2 - 16. Imm, N = 90) and 15.7 ± 3,43 Prefectur eshowed that thi sspecies is distribu tiend mm (rang 8e.:5 - 26.4mm, N = 90) .These plants western Honshu. Hence there is a possibili ttyhat in had sepals clearly shorter than their petals .The western Honshu, Hiroshim aPrefectu rAe. ,multijlbra ratio of aggregate frui ltengt hto width was O.98 ± is found also at other localit iiens the yicinity of rfaishaku-kyo O,06 (rang Oe.:85 - 1.05 ,N - 90) ,and these plants Gorge. had spherical aggregate fuit sF.igure 1 shows the The populatio nofAdonis inultij7ora located length of aggregate frui tand the number of achenes around the faishaku-ky Goorge ,Hiroshima Prefec- per aggregate ftui tT.he presen Atdonis species was ture, is also worthy of special mention for conser- not significantly dificir fernotm A. multij7bnx, but sig- vation of this species, and at leas tten thousand nificantly diffbr efnrtom the other three species of individua alrse fbund in this area. According to the Adonis (A ,ramosa, A. amuiensis, and A, shikokuen- Environmenta lAgency of Japan (200 0t)he, esti- sis). Based on these results, the Adonis species mated number ofindividuals ofA. multij7bra in fbund around Taishaku-kyo Gorge in Hiroshima Japan was approximately ten thousands. Therefbre Prefectur eshould be ascribed to A. multij7bra, and the population ofA. multij7bra in Hiroshima could not A. ramosa. be one ofthe 1arge ssttocks ofthis threatene dspecies Nishikawa & Ito (200 1rep)erted the distribu-in Japan. tion ofAdonis multijlora in northern Honshu and Kyushu. However, the Adonis species reported in Honshu A, western was regarded as ramosa NII-Electronic Library Service TThhee JJaapapnaesneSeosciee tySociety ffoorPrl anPtlSyastnetma tSicysstematics December2005 KANEKO et aL : A Ncw Localit yofAdonis muttij7ora (Ranunculac ien aJaep)an 263 Reference Univ.Ed,(SecItIB)39(2):1-25. & Ko, Ito .1978. New chromosomc numbers of Environmen tAgency. 2000. Threatened Wildlif oefJapan- Adonis amurensis Regel et Radde of Hokkaido. J. Red Data Book, 2nd,, Vbl. 8. 495 p. Vascula rPlants. Jpn. Bot. 53: 33-43. Japan Wildlife Reserch Center ,Tokyo .(i nJapanese) & .1979, The chromosome numbers ofAdbnis Hiroshima Prefecture. 2004. Threatened Wildlif eof amurensis Regel et Radde (scns luate )of northem Hirohima-Red Data BoQk, 2nd, 309 p. Hiroshima Honshu. J. Jpn .Bot. 54: 353-362. Prefectur Weild lif eSpcciali s(t[}rou pH,iroshima, & .2001. A New species ofAdbnis (Ranuncula- (i nJapanese) ceac) from Shikoku ,Wt stern Japan .Bull. Natn. Sci. Kaneko,S.,N,Nakagoshi,& YLIsagi2.002.Endangered Mus, Tbkyo, Ser .B, 27: 79-83. plant sin flor aof [[aishaku-k yGoorge, Japan .Sci. Ohwi, J. & Kitagawa ,M. 1983. Flora ofJapan. 697p. Rep, Hiroshima Univ. 28:85-10 7(.i nJapanese) Shibundo ,Tokyo. (i nJapanese) Nishikawa ,T. 1 988, Botanical Studies on Adonis aniuren- Shimane Prefectur 2e0.04. Shimane red data book 2004. sis Regel and Radde in Japan (Pa r1t) .J. Hokkaido 270 p. Shimane Prefectu rWeild lif eSpecialis Gtroup, Matsue.(iJnapanese) Univ, Ed. (Sec ItI B) 39 (]):1-35. .1989a, A new species ofAdonis in Japan .J. Jpn, Yamashita ,T. 1987. Flora of Taishaku-ky egorge .In Bot, 64:50-52. Oda, K. (ed N.a)tural I-Iisto refy Tlaishaku- kGyoorge. 1989b ,Botanica lStudie son Adonis amt;rensis pp. 147-188 .Natural Histor yof Taishaku-ky Goorge R,egel and Radde in Japan (Par t2>. J. Hokkaido Speciali sGtroup, Shobara .(i nJapanese) Reeeived ,VLtrch 22, 2005; acceptedAugust 23, 2005 NII-Electronic Library Service