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ISSN 1346-7565 Acta Phytotax. Geobot. 64 (1) 4:1-43 (20 31)
A PeloricFormof Cymbidiumnagifolium (Orchidaceae)
KENJISUETSUGU
Graduate Schooi ofHuma nandEnvironmental Studie sK,yot oUniversiij }lloshidd-Arihonmatsu-cho,
Salyo ,1<),ot o606-8501 ,mpan .kenjisuetsugu@g,nail.com
A new, pelori fcorm of dymbidi unamgijblium Masam,, discoveredwith aipnopulation in Miyazaki Pre-
fectur es,outhern Japan, is described .The pelori fcbrm can be categerized as TYpe B pelori wahere the
labellum is replaced by a third petal resembling the latera lpetals .The mutation may be widespread with-
in the populatio nsi,nce three individua flrsor nditl'er clnotcatio nhsad pelori fciowers.
Key words: dymbidi unamgijZ,liuni f copmrme, Orchidaceae, pelori vcariation
The Orchidacea eare one ofthe most species- meters away frem each other over an area of ap-
rich and morphologically divers eplant families proximately 3O m by 200 m to cultivate in the lab-
(Jersak oetv aal 2006, Ramirez et al 2007). Or- oratory. When the plant sbloomed, the lips were
chid fiower shave always fascinat ebdiologistsundifTerentiated periant hsegments. While the
(Cozzoli n&o Widmer 2e05), largel ybecause of fiora mlorphology of orchids sometimes differs,
their complex flor ailnnovation sO,rchids usually even within the same individua l(sPete &r John-
have zygomorphic flowers characterized by an son 2009), all of the flowers ofthe three individu-
outer whorl ofthree sepals and an inner whorl of als in cultivation were peloric .I could not precise-
three petals ,as in most monocots, The sepals are ly estimate the frequenc yof the mutant form
often differentia tiendt oa large ,showy dorsal o,r within the population ,but because 3 individuals
medial, sepal and two latera lsepals. TWe lateral collected from differen tlocation swere peloric,
petals flan kthe often extremely enlarged third the mutation may be w{despread within the popu-
petal ,known as a labellum. The labellu mserves latio nI, therefore describ ea new form of C. na-
as a landing platfbrm fbr pollinator s(Ruda l&l gij?)liu mas an additional case ofpeleric mutants
Bateman 2002). in Japanese erchids. The mutation can be catego-
While orchid flower sare usually zygomor- rized as TYpe B peloria ,where the labellu mis the
phic and bjlatera lslymymetrical, rare mutations same as the Iatera lpetal s(Ruda l&l Bateman
occur and variants with actinomorphic fiowers 2002),
may develop .The actinomorphic mutant flowers Pelori mcutants can recur, and may reproduce
are more commonly called pelori a(Ruda l&l via seeds in certain circumstances (Burns-Ba-
Bateman 2002). Pelori cvariants, such as in El- logh & Bernhardt 1988, Teppner & Klein 1998,
eorchisJ'aponica (A .Gray) F. Maek, var. conj?)r- Hedr6n et al 2000), which means that they can
mis (F M.aek.) F. Maek, ex H. Hara & M. Mizush. establish Iineages that are sufTlciently long-lived
and EPipae tthiusnbergii A. Gray fi subconjbrmis to be legitimate rleycognized as distin cstpecies
Sakata, have already been discovere din Japan. (Ruda l&l Bateman 2002). Unfbrtunately ,infbr-
During a recent fiel dsurvey, I found several mation on biologica ldifference s such as polli-
individua lofs (lymbicfium nagijblium Masam, in nation biolog ybetween normal and peloric
Miyazaki Prefecture ,southern Japan.Itook 3 of forms remains largel yunknown. It is worth
approximately 10 plants growing several dozen testing whether the frequency of pollinat ovirsits,
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TThhee JJaapapnaesneSeosciee tySociety ffoorr PPllanatnt SSyystsetmaetmicastics
42 A c ra Ph vtotax. Geobot. N･'o l6.4
v
species assemblage ofpollinators, and the ability July 2012. Kent' iSuet.s'tf 2g ･uOi2-1. (Holotyp KeY:O). The
to selffertilize difTe fri:o mthe normal fbrm of C type specimen was collected from a cultiN'ated plant that
had been transplanted to the laborato rony Februar y25.
tlagc'foiillm.
1O12.
fa.vonomt eti'eatment .lapanese name. Hoshigata-nagi-ran .nov.
Disn'ibifti onand notes. Currentl yC.Ii'nibidi-
C},mbidium nagifolium Masam. f iconforme um nagijZ)titon fi eonfoivne is kno-,n only in the
Suetsugu ,forma nov. Fig .IA-E. type locali tTyh,e site is a dense fores dtominated
by Castanopsi ssiebordii (Makino )Hatus. ex T,
Cisiiuim oinlbyid ii n tnaitgtmi sfpoet]ioitrnit ctf llcooiwlefori s'w.mheer edif tfhee rt[s'arboem tl Llnua gmiisj rZe}-- Yamaz. & Mashiba with sparse herbaceou sun-
derstory,
placed by a third petal rcscmb[ing thc Latera [pctals,
41)i tj.apsa.n .Miyazaki Pref. Koyu-gun. Mera, IS
FIG. 1. Cvmbidiu nmagtfb/ium )viasam .f .coirlbrme Suetsugu (,n fLi)ewerin gindividual (.B) sepal and peta[ ,(C} dorsa Nl'ie" of
column. CD) side yiew ofcolumn and CE) ventral yie" ofcolumn. Photegraphs taken c)n July 15, 2012.
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June2013 SuETsuGu-Peloric Form inCymbidium 43
nation and pseudo-fru isett in South African species
References ofEulophia (Orchidac eS. aAefr)i.can J .Bot. 75: 791-
797.Ramirez,
S.R.,B.Gravendeel,R.B. Singer,C.R.Mar-
B ur naasen:-dB Napelhooytgtlhi,oo giPed. ne& yai enP) .t. PhBLee rStnryihsbater .TEdhtve,ol yl1m .9i18t5r8e9, a :Fe1I9o- r(4alO 7e,rvolcuthioindace - NsOahratclulhr ie&d 4 aN4c.8 e: E a 1.e f0 Pr4io2e-i 1rna0c 4fe S2o..0s0s 7i o, ]rDcah itdi nwig tthhe iotr sipgio nl l oif ntahetor.
CozzolinoS,.& A, Widmer, 2005.0rchid diversity:An
evolutio nar y con sequence of de ceptio n T?rends E col, R u dasaltil oPn,,. J z.&ygo mRor.p hMy, Bat eanmda nh, e20t0e2r.o Rtoolp eyis n off lsyonrora gaelnvio-lu-
H e d rEpevonol,ly .pM l2.o0,i] dE4s ,8 i7Kn-l 4et9hie4n . E&u rHo.p efaenp ponrcehrid. 2 0g0e0nu. sE vNoilgurtiito enotfla: t4oi4toh1ne.:r Tlhiel igoy inmoconlsoctoetms.iu m Baindol loagbiecl alRluemv oife owrsc hi7d7s: 4 0an3d-
Je r sEtavrkiiodav e)4an,0c: Je2. 3f9Sr-o.m2D 7.a5l.lJozoyrhnneso nda&ta.P .PhKyitnodnl m(aHnonr.n 2,A0u0s6-. T e p pNnie'rg, riHt.e l &iav erEsu. s K le(ilny. mn1a9d9e8n.i aE:t iNaemu kaotmqubein aettiiaomne n-
Mechan ism s and evolution of dec eptiv peollin atio nin cuenade: ( lOyrmcnhaicdieeanei)a , dPohlytoomni t(eHnso isrsp encA,.u snotvari a ()3O8r: c22h0i-cla-
orchids. Biological Reviews 81: 219-235, 224,
Peter ,C. L & S. D, Johnson 2009. Autonomous selfpolli-
ReceivedOctobe rJ3 ,2012: acceptedJbnuanyy 20, 2013
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