全 文 ：热带亚热带植物学报　2009, 17(4):355 ～ 357
JournalofTropicalandSubtropicalBotany
收稿日期:2009-02-12　　　接受日期:2009-05-05
＊通讯作者 Correspondingauthor
中国眼树莲属(萝藦科)两新记录种
廖明芳 1, 3 , 王　洪 2 , 邓云飞 1＊
(1.中国科学院华南植物园 , 广州 510650;2.中国科学院研究生院, 北京 100049;3.中国科学院西双版纳植物园 , 云南 勐腊 666303)
摘要:对中国萝藦科眼树莲属两新记录种线叶眼树莲 DischidiasingularisCraib和倒卵叶眼树莲 Dischidiagrifithi
Hook.f.作了描述 ,并给出中国眼树莲属的分种检索表。
关键词:萝藦科;眼树莲属;新记录;中国
中图分类号:Q949.776.6　　　　　文献标识码:A　　　　　文章编号:1005-3395(2009)04-0355-03
TwoNewlyRecordedSpeciesofDischidia(Asclepiadaceae)fromChina
LIAOMing-fang1, 2 , WANGHong3 , DENGYun-fei1＊
(1.SouthChinaBotanicalGarden, ChineseAcademyofSciences, Guangzhou510650, China;2.GraduateUniversityofChineseAcademyof
Sciences, Beijing100049, China;3.XishuangbannaTropicalBotanicalGarden, ChineseAcademyofSciences, Mengla666303, China)
Abstract:TwonewlyrecordedspeciesofDischidiaR.Br.(Asclepiadiaceae)fromChina, D.singularisCraiband
D.grifithiHook.f., arereported.AkeytoChinesespeciesofDischidiaisprovided.
Keywords:Asclepiadacea;Dischidia;Newrecords;China
ThegenusDischidiaR.Br.(Asclepiadaceae)is
mainlydistributedintropicalandsubtropicalAsiaand
Oceaniaandconsistsofabout80 species[ 1] .Five
specieshave been reported in Chinabefore[ 2] .
DischidiaR.Br.belongstotribeMarsdenieae, andis
similartoHoyaR.Br[ 3] , inhabitat, butdifersfrom
the later in its ovoid-urceolate, minute and
inconspicuous(vs.rotateorreflexed, conspicuous)
corolaandnotveryfleshy, erect(vs.fleshy,
stelatelyspreading)corona[ 4] .Inthecourseofthe
recentfieldworkinYunnanProvinceandspecimens
examinationinsomeChineseherbaria, twospeciesof
DischidiawerefoundasnewrecordstoChinaandhere
reported.
1线叶眼树莲
DischidiasingularisCraib, Bul.Misc.Inform.
Kew1911:419.1911.TYPE:Thailand, Chieng
Mai, DoiSootep, 900 ～ 1 200 m, ontreesinopen
jungle, Ker1294(BM), 1294a(BM, P!).
Epiphyticlianas, glabrousexceptcorolalobesand
seeds.Stemsslender, hanging, toca.1 mlong, with
iregularpurplespots.Leavesopposite;petioles0.5 ～ 1
mm;blades2.5 ～ 6.5 cm ×0.3 ～ 2 cm, linearor
lanceolate, apexmucronate, marginrevolute, withapair
ofslightlyexpandedtriangularangleabovemiddle, base
cuneate, paperywhendry, veinsinconspicuousonboth
surfaces.Umbelextra-axilaryorterminal, few-flowered;
peduncleextremelyshort.Flowerbudcreamyyelow,
piriform.Pedicelsca.2mmlong.Sepalssmal, ovate
orlanceolate, 0.5 mm×1 mm, apexobtuse.Corola
urceolate, ca.3.5mmlong, throatconstricted, white
inside, creamyyelowoutside;tubesca.2mmlong;
lobes5, ca.1.5mm×0.5 mm, linear, apexacute,
outsideglabrous, insidedenselycoveredwithwhite
hairs, lobesandthroatslightlythickened.Corona
lobeserect, membranaceous, nearlyrounded, distinctly
separate.Folicleslinear[ 5-6] .
China.Yunnan(云南):MenglaXian, Menglun
356　 　热带亚热带植物学报 第 17卷
(勐仑), alt.1 000m, inrainforest, WangHong(王
洪)s.n.(HITBG).
Distribution:Thailand, Myanmar, Vietnamand
China.
Ecology:InChina, itisepiphyticontrunkoftrees
inevergreenforestataltitudeofabout800m.
Thespeciesiseasilydistinguishedfrom other
speciesinthegenusbyitslinearorlanceolateleaves
withapairofslightlyexpandedtringularanglesabove
middle.
2倒卵叶眼树莲
DischidiagrifithiHook.f., Fl.Brit.India4:51,
1883.DischidiaobovataGrifith, Not.Pl.Asiat.4:51.
1854, non Decne. 1844. TYPE: Myanmar,
Tenasserim;atMergui, on trees, Grifiths.n.
(holotype, K).
Epiphyticshrubs, glabrousexceptcorolathroat
andseeds.Stemsterete, 3 ～ 5 mmdiam., branches
greyishgreen.Leavesopposite;petioles0.8 ～ 1.2cm;
blades4 ～ 7 cm×2 ～ 3 cm, obovate, basecuneate,
marginentire, apexacute, lateralveins3 ～ 5 pairs,
inconspicuousonbothsurfaces.Umbelsextra-axilary
orterminal, few-flowered;pedunclesveryshort, stout,
asthickasthebranch.Flowerssmal, white.Pedicels
veryshort, ca.1 ～ 2 mmlong.Sepalsminute, ca.
0.5 mm×1mm, triangular, apexrounded.Corola
Fig.1 DischidiasingularisCraibandDischidiagrifithiHook.f.
1.FruitbranchesandleavesofD.singularisCraib(PhotoedbyWANGHong);2 ～ 3.D.grifithiHook.f.,
2.Floweringbranch;3.Flowers(PhotoedbyLIAOMing-fang)
第 4期 廖明芳等:中国眼树莲属(萝藦科)两新记录种 357　
urceolate, ca.4.5 mmlong, throatconstrictedwith
hairs, whiteinside, creamyyelowoutside, glabrous
exceptlobes;tubesca.3 mm, lobes5, triangular-
ovate, ca.1.5 mm×1 mm, apexacute, outside
glabrous, insidedenselycoveredwithwhitehairs,
lobesandthroatslightlythickened.Coronalobes
white, fleshy, angular, base2-fid.Polinatumid,
obovoid.Folicleslinear, ca.6.5 cm×0.8 cm.
Seedsovate, ca.3mm×1mm.Fl.Aug.～ Oct.[ 7] .
China.Yunnan(云南):Mengla(勐腊), Menglun
(勐仑), alt.1 000 m, inopenforest, LiaoMingfang
(廖明芳)0919 (IBSC);Mengla(勐腊), alt.500 m,
inrainforest, PeiShengji(裴盛基)5910702 (KUN);
Jinghong(景洪), Mansa(曼萨), alt.560m, inopen
forest, K.M.Feng(冯国楣)20181 (IBSC, KUN);
Mengla(勐腊), Manting(曼亭), alt.650 m, Zhang
Guicai(张桂才)5958(IBSC).
Distribution:Thailand, Laos, Vietnam and
China.
Ecology: In China, itis found only in
Xishuangbanna, SYunnan.Itisepiphyticontree
trunksinevergreenforestataltitudeof500 ～ 1 000m.
ThespeciesresemblesHoyaplantsinitsfleshy
andcomparativelylarge-sizedleaves.Sinceitsflowers
easilydropoffrom peduncleswhendried, some
specimensweremisidentifiedas“ Hoyasp.” in
Chineseherbariabefore.In2008, thefloweringplants
werefoundinthefield(Liao0919)andindicatedthat
itisamemberofDischidiaR.Br.andquitediferent
fromHoyainitsovoid-urceolate, minutecorolaand
erectcorona.
　　 KeytothespeciesofDischidiainChina
1.Leafbladelinear, marginslightlyexpandedtoapairoftriangularanglesabovemiddle D.singularis⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
1.Leafbladeovatetoorbicular, orobovate, marginentire.
2.Leafbladeapexretuse D.formosana⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
2.Leafbladeapexacuteorobtuse, ornearlyrounded.
　　3.Leafbladeobovate, obovate-eliptic, widestabovemiddle D.grifithi⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
　　3.Leafbladeovate, ovate-elliptic, obovateororbicular, widestbelowmiddle.
　　　　4.Leafbladeeliptic, narrowlyelliptic, acuminateonbothends D.australis⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
　　　　4.Leafbladeovate, ovate-elliptic, obovateororbicular, basecuneatetorounded, apexacutetoobtuse.
　　　　　　5.Corollalobeswith3-angledtips, corollausuallyglabrous, occasionalythroatsoftlyhairy D.tonkinensis⋯⋯
　　　　　　5.Corollalobesflatoronlyslightlythickened, corollathroatorlobesobviouslyhairy.
　　　　　　　　6.Leafbladeorbicularorovate D.nummularia⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
　　　　　　　　6.Leafbladeeliptic, narrowlyelliptic, orovate-elliptic D.chinensis⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯
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