Theropogon pallidus, New to the Flora of Thailand

5 Pages·1996·1.5 MB·English

by  Noriyuki Tanaka

植物研究雑誌
J､Jpn､Bot.
Originals 71:305-309(1996)
Therqpogonpallidus)NewtotheFloraofThailand
NoriyukiTANAKA
DepartmentofEducation,SchoolofLiberalArts,TeikyoUniverslty,
3590tsuka,Haci句i-Shi,Tokyo,192-03JAPAN
(ReceivedonMay7,1996)
771erqPOgOn,amOnOtyPICgenuSOfIliliaceaeknown丘omtheHimalayanrangeanditsadjacentreglOnS,
wasconfirmedtoexistalsoinnorthernThailand.ThisnewThailocalitybecomesthenewsoutheastemmost
localityinthegeographicalrangeofthegenus･ThespecimenfromThailandhassomedifferencesfrom
Therqpogon(T.pallidus)aspresentlyknown,buttheoveralldiffbrenceseemsnotsogreat,andtherefbreIassign
thisspecimentothesamespecies･ThisreportcontainsmorphologlCalandotherdataonthisspecimen･
InhisNumericalList,Wal1ich(1832)listedthe 丘omOクゐg呼OgO托.
nameOphippogon?pallidusWall.fbraplantfrom However,thisspecimenhassomedifferencesfrom
Nepalwithoutanydescription.Kunth(1850)studied Therqpogon(T.pallidus),aSPreSentlyknown.First,
thisplantandgaveitadetaileddescrlPtlOnunderthe itisrelativelysmallinsizeasawhole･Forexample,
Same name.Later,having studied this species, itspedicelsareOnly3to4mmlong,equalingthe
Maximowicz(1871)established the new genus Shortestlengtheverrecordedinthisspecies(Noltie
T%erqpogon.ThisgenushasbeenmonotypICSinceits 1994),anditsstyles2.1to2.6mmlong,beingnearly
establishmentcomprlSlngOnlyonespecies,T･Pal- halfoftheshortestlength(4.3mm:Noltie1994)ever
1idus(Wall.exKunth)Maxim. reported.Second,there exists a differencein the
ForthepurposeofstudyingthegenusOphi甲OgOn flowercolour,aSfollows.Flowersofthisspecimen
taxonomically,Ihavehadaloanofsomespecimens arewhite,andtepalshaveapaleyellowcentralline
Ofthatgenus丘･OmtheNaturalHistoryMuseumin andyellowtlP,aCCOrdingtothecollector'srecord
Paris,andIfoundthatitincludedaspecimenwhich (citedbelow),WhiletheflowersofT.pallidussofar
CanbeidentifiedasTherppogon(Figs.1&2).This reportedarewhiteortingedpinkishorpurplish(Baker
1875,Hooker1875,1894,Krause1930,Hara1971,
SPeCimenwasformerlyidenti丘edasOphiqpogonby
theorlglnalcollectors.However,inmanyrespectsthe Liang1978,Utech1979,PoluninandStainton1984,
SPeCimenaccordswellwiththeknowncharacteristics Chen1987,Noltie1994).Intheserespects,theplants
Of771erqPOgOn･Forexample,thisspecimenhasa Ofthisspecimenappeartobedifferentiatedtosome
SuPeriorovarywith9to120Vulesineachloculus degreefromT･Pallidussofarknownl)･However,the
(Fig.2B),filamentsofnearlythesamelengthasthe OVeralldeviationofthisspecimenseemsnotsogreat
anthers(Fig.2A),andleaveswithaprominentmidrib astowarrantestablishinganewspecies.Therefbre,I
beneath(Fig.2A).ManyofthesecharaCterSdiffer asslgnthisspecimentoT.pallidus,andthespeciesis
ー305-
306 植物研究雑誌 第71巻 第6号 平成8年12月
henceregardedashavingabroaderrangeOfvariation thatitwascollectedfromalimestonepeak･However,
thanbefore. ageneralftatureofthehabitatandthealtitudewhere
Asforthehabitatofthisspecimen,itisnoteworthy thisspecimenwascollectedalsocoincidewiththe
Fig･1･AspecimenidentifiedasT･PallidusfromThailand･
December1996 JournalofJapaneseBotanyVol.71No.6 307
isolated,andsouthernmOStinitstotalrange･Thereis
PreViousrecordsforT.pallidus(Forexample,Noltie
(1994)reportsthatitshabitatisdryrockyhillsides, agoodpossibilitythatinfuturethisspeciswillalso
anditisfoundataltitudesbetween1830-3970m). beR)undinthereglOnSbetweenthisnewlocalityand
Therppogonpallidusis known to existin the thefbrmerlyknownlocalities(Forexample,itmay
HimalayanrangeandreglOnSadjacenttoit,including be丘)undinMyanmar,etC.).
Uttar Pradesh(Kumaon),Nepal,Sikkim,Bhutan, ThehabitatofthisverylntereStlngSPeCiesinthe
Assam,Khasia,Tibet,andN.andN.W.ofYunnan SOuthernmOSt,isolatedlocalityinThailandisimpor-
(Maximowicz1871,Baker1875,Hooker1875,1894, tantinvariousrespects,andIhopeitwillnotbelost
Engler1888,Krause1930,Kitamura1955,Haraetal. infutureduetohumanactivities.
1978,Liang1978,PoluninandStainton1984,Wu
1984,Chen1987,Noltie1994).Whereas,aSPeCimen Theropogonpallidus(Wall.exKunth)Maxim.,
hereconcernedwas collectedinnorthernThailand. Bull.Acad.Imp.Sci.St.-P6tersb.15:90(1871).
AsfarasIamaware,thisreportisthefirsttorecord qphiqpogon?pallidus[Wa11.,Numer.List:179,
theoccurrenceofT.pallidusinThailand.Thisnew n.5138(1832),nOm.nud.】exKunth,Enum.Pl.5:300
localityinThailandisfarawayeven丘■Omthenearest (1850).
knownlocality(N.W.Yunnan)ofT.pallidus,hence DescrlPtionbasedonthespecimenfromThailand:
Fig･2･Close-uPSOfsomepartsofthespecimeninFig･1･A･Aninflorescenceandleaves･Stamen,PIStil,and
midribareindicatedbyus",りpり,and=m‖,reSPeCtively･B･Lowerpartofapistil,Showinganalignmentofovules
inaloculus･Theupperpartofthestylehasbeenlost.Scaleinmm.
308 植物研究雑誌 第71巻 第6号 平成8年12月
Tuftedherb.Totallyglabrous.Rootstockthickand habitat.Accordingly,athoroughexaminationofaset
Very Short with many thick fibrous roots.Leaves Ofthesespecimensmayhelpconsiderablyourunder-
linear,attenuatedtotheapex,Sheathedatbase,uPtO
Standingofthevariationofthisspeciesatthelocality.
27cmlong,2.5-5.7mmwide,midribelevatedbe- 2)specimenswiththesameCO11ectionnumberkeptat
neathandprominent.Scapeslender,COmPreSSedes- AAH,BKF,C,andLwereidentiBedbyCharoenphol
PeCiallyinupperpart,angledandnarrowlywlnged, (1974)asOphiqpogonmalcolmsoniiRoyleexHook.f.
14･5-17cmlong.Inflorescenceraceme,1.7-1.8cm Accordingtohispaper,thesespecimenswerecol-
long,4-flowered.FlowersborneSlngly,Subtendedby 1ectedin the samelocality as the specimen here
bothabractandabracteole.Pedicelscurveddown- examined,butatadifferentaltitude,1200m.
Ward,3-lmmlong.Bractslanceolatetonarrowly
Retもrences
lanceolate,WithmembranousmarglnS,0･35-2cm
BakerJ.G.1875.Revision ofthe Genera and Species of
long･Flowerscampanulate,drooplng.Tepals6,free Asparagaceae.(771erqPOgOn:P,562･)Journ･Linn･Soc.,Bot.
14:508-632,pl.17-20.
tobase,imbricated,OVate,5-6mmlong,2.5-3mm
CharoenphoIC.C.1974.StudiesinThaiLiliaceae.ThaiFor.
Wide,1-Veined,Slightlyrecurvedoutwardinupper Bull.,Bot.$:88-94.
ChenS.-C.1987.TherqpogonMaxim.p.562,Pl.304(ト2).In:
Part･Stamens6.AntherslanCeOlate,minutelyapICulate
WuC.-Y.(ed.),FloraXizangica.Vol.5.SciencePress,
at apex,2mmlong,1ntrOrSe.Pollen grains pale Be毎1ng.
EnglerA･1888･Liliaceae･P･10-9-1･(77wqpogon:P･81)･In:A･
yellow･Filamentsc.1.5mmlong,broadandflat-
EnglerundK.Prantl(ed.),DieNattirlichenPflanZenfamilien
tened,C･0.9mmwide,basevery shortlyconnate II(5).Verlagv.WilhelmEngelmann,Leipzig.
HaraH.1971.Liliaceae,P.165-175.(771erPPOgOn:P･174).In:
laterally betweenneighbourlng丘1aments.Ovaries
HaraH.(ed.),FloraofEasternHimalaya.2ndReport.Univ.
SuPerior,Subglobose with3longitudinalshallow OfTokyoPress,Tokyo.
grooves(i･e･,trilobedincross-SeCtion),2mmlong,3- +,SternW.T.andWi11iamsL.H.J.1978.AnEnumera-
tionoftheFloweringPlantsofNepal.Vol.1.(771erPPOgOn
locular.Ovules9-12ineachlochlus,arrangedin2 Maxim,P.80.).BritishMuseum,London.
HookerJ.D.1875.771erqPOgOnPallidus･Curtis'Bot･Mag.101:
rowslongitudinally on centralmarglnalplacenta･
t.6154.
Styleveryslender,Slightlyattenuated,2.1-2.6mm
+1894.FloraofBritishIndia.Vol･6.77wqpogon:P･
324.L.Reeve,London.
long･Stigmaveryminute.
KrauseK･1930.Liliaceae,P.227-386･(771erPPOgOn:P.370-
Specimenexamined:Thailand,ChiangMai,Doi 371).In:A.EnglerundK.Prantl(ed.),DieNatむ1ichen
Pflanzenfamilien.15a.Verlagv.WilhelmEngelmann,Leip-
Chiengdao.Limestonepeak.Alt.c.2075m.Between
Zig.
rocks.FIs.white,butlobeswithapaleyellowcentral KitamuraS.1955.FlowerlngPlants andFernS.P.73-290.
(771erqPOgOn:P.96).In:KiharaH.(ed.),FaunaandFloraof
lineandye1lowtip･20June1968･C･F･VanBeusekom
NepalHimalaya.Vol.I.FaunaandFloraResearchSociety.
&C.Phengkhlai,n.13522)(P,eXHerb.Lugd.Batav.). KyotoUniv.,Kyoto.
KunthC.S.1850.Enumerati6plantarum.Tomus5.Qphiqpogon
?pallidusWall･:P.300-301.StutgardiaeetTubingae.
Ithank the curator ofthe NationalMuseum of LiangS･-Y･1978.771erqPOgOnMaxim.:P.2&pl.1.In:Wang
F･-T･etTangT.(ed.),Liliaceae(2).FloraReipublicae
NaturalHistoryin Paris(P)fbr theloan ofthis
PopularisSinicae15.SciencePress,Beijing.
SPeCimen. Maximowicz C.187l.Ophiopogonis speciesin herbariis
Petropolitanis.(771erqPOgOnMaxim.p.89-90.)Bu11.Acad.
Imp.Sci.St.-Pitersb.15:83-90.
Endnotes NoltieH･J･1994･FloraofBhutan･Vol･3(1)･771erPPOgOn:P･
l)Aspecimenhereexaminedisoneofthosedistrib- 192.RoyalBotanicGardenEdinburgh,Edinburgh.
PoluninO･andStaintonA.1984･FlowersoftheHimalaya.
utedfromtheherbariuminLeiden(L),Netherlands. 771erqPOgOn:P.428,Pl.123.OxfbrdUniv.Press,Oxford.
UtechF.H.1978.FloralvascularanatomyoftheHimalayan
Thismeansthatpluralnumberofspecimenswiththe
T71erqPOgOnPallidusMaxim.(Liliaceae-Conva11arieae).An-
Same COllection number were madefromthe same nalsofCamegieMuseum48:25-41.
December1996 JournalofJapaneseBotanyVol.71No.6 309
WallichN.1832.AnumericallistofdriedspecimensintheEast Wu.C.-Y.1984.Index Florae Yunnanensis.TomusII.
IndiaCompany'sMuseum.Ophiqpogon?pallidusWall･:P･ (Therqpogon:P.1939).ThePeople'sPublishingHouse,
170,n.5138.London. Yunnan,China.
田中教之:撒e叩聯〝pαJJf血ざタイに産す
ジャノヒゲ属((わゐ∫呼曙0乃)の研究のためにパ の多くの個体についてさらに詳しく研究する必要
リの自然誌博物館から標本を借用していたが,そ もあるが,現時点においては,この標本は,r
pα招血∫であると同定する.
｡の中の一点に,採集者によって(わ鋸呼曙0乃と同
定されているが同属とは明らかに異なるものがあっ rpαJ〃血∫はこれまでヒマラヤとそれに続く山
た.この標本は,多くの性質において乃eJ叩曙0乃 地,ないしはその近傍の山地に分布することが知
られていたが,この標本の採集地はタイの北部で
pαJJ励ぶ(ユリ科)と一致する.しかし,全体的
に小形であり,花梗は長さ3-4mmで,花柱も あり,これまで知られているもっともそこに近い
長さ2.ト2.6mmしかない.また,採集者の記録に 生育地(中国雲両省北西部)からもかなり離れて
よれば,花は白色であり,花被片の端部は黄色で, いる.タイにおける本種の分布はこれまで知られ
花被片の中央には淡黄色の筋があるという.これ ていないと思われるので,ここに報告することに
まで知られているrクα肪血ぶの花色は,白色か, した.この地が同種の分布域の南限となる.
ピンクないし紫色を帯びる.このような点におい 乃eJ叩卿乃属はrpαJJ誠一∫一種からなる単型属で
てこの標本の個体は,これまで知られているr ある.その分類学的位置づけについては,今後の
研究に委ねられるところが多い.この極めて興味
pαJJ肋ぶとは僅かながら分化しているのかもしれ
ない.しかし,仮にこれらの性質が原産地におい 深い種の,しかもその分布域の最東南部の隔離的
て安定しているものだとしても,その差異は種を 分布地であるこのタイの生育地が,いっまでも無
分かっはど大きいものではないと判断する.生育 事であることを望みたい.
地や海抜も既知のものとあまり変わりはない(た (帝京大学文学部教育学科)
だし,この標本の産地は石灰岩地である).現地