Table Of Content植物研究雑誌
J. Jpn. Bot.
77: 24-35 (2002)
Studies of Juncus (Juncaceae) in the Sino・HimalayaRegion 11.
Taxonomical Studies of the Juncus duthiei Group
Futoshi MIYAMOTOa and Hideaki OHBAb
aDepanment of Agriculture，T okyo University of Agriculture，
Funako 1737，K anagawa，2 43-0034 JAPAN;
Department of Botany，Un iversity Museum，Un iversity of Tokyo，
b
Hongo 7-3-1，B unkyo-ku，T okyo，1 13・0033JAPAN.
(Received on February 13，2 001)
The Juncus duthiei group，c omprising seven species，is distributed in the Sino-
Himalayan floristic region. The morphological features of this group have been insuffi-
ciently known. In白ispaper，fu ll descriptions and drawings of all the species of the J.
duthiei group induding: 1) Juncus biglumoides H.H訂a;2) J. bηophilus Noltie; 3)よ
duthiei (C.B.Clarke) Noltie; 4)よhαraeMiyam. & H.Ohba; 5)よrohtαngensisGoel &
Aswal; 6) J. uniflorus W.W.Sm. and 7)よlongiflorus(A.Camus) Noltie are provided.
(Continued from 1. Jpn. Bot. 74: 72-81，1 999)
Key words: description，Ju ncus，S ino-Himalaya，t axonomy.
The Juncus duthiei group，c omprising J. scription of the species due to the lack of
biglumoides H.Hara，J. bryophilus Noltie，よ reliable diagnostic characters. Another rea-
duthiei (C.B.Clarke) Noltie，よ harae恥1iyam. son is that some species are restricted in their
& H.Ohba，よ long~βorus (A.Camus) Noltie， distribution and the morphological features
J. rohtangensis Goel & Aswal and よ of those species紅einsufficiently known.
uniflorus W.W.Sm.，is characterized by hav- This paper provides full descriptions and
ing cylindricalleaves，th e sheathing bract on drawings of the seven species of the Juncus
the peduncle absent，th e lowest bract longer duthiei group.
than or as long as the flowers，t he flowers
clustered in heads，a nd stamens as long as or Key to the species of the Juncus duthiei
shorter (sometimes slightly longer) than the group
perianth. These species are distributed in the 1. Anthers shorter than filaments
Sino-Himalayan floristic region and grow in 2. Stamens as long as or slightly longer
grasslands，o n scree slopes and on mossy than perianth; stem multi grooved ..
banks. The group is thought to be closely re- ・…・ J.biglumoides
lated to the J. himalensis group (Miyamoto 2. Stamens shorter than perianth; stem with
and Ohba 1995)，b ut differs in lacking a as ingle groove or not grooved
sheathing bract on the peduncle. The species 3. Filaments three times longer than an-
of theよ duthieigroup紅emorphologically thers; perianth chestnut brown，s hining
similar to each other and the taxonomy of the ..J. duthiei
group has been confused. One of the reasons 3. Filaments twice as long as anthers;
for the confusion has been the poor circum- perianth brown......・・...・...J. bryophilus
H
-24-ー
February 2002 Journal of Japanese Botany Vo .l77 No. 1 25
1. Anthers longer than filaments mmw ide，s essile if solitary; peduncle 0.3-
2. Basal leaf 1( or 2); lowest bract longer 0.4 mml ong; perianth p lanceolate，inner
紅白
than flowers，l inear-lanceolate or fili- perianth p紅白 longerthan outer，3 .0-3.5 mm
form long，0 .9-1.1 mmw ide，o uter perianth p紅白
3. Inflorescence proliferous ・... ・.J. harae 2.5-2.8 mm long， 0.75-0.85 mm wide，
H
3. Inflorescence non-proliferous chestnut brown，s hining. Stamens 6，as long
4. Anthers twice as long as filaments. as inner perianth，s ometimes slightly longer
...・ ・.....・ ・.J. harae than outer perianth，3 .2-3.5 mml ong; fila-
H H
4. Anthers four times as long as fila- ment 2.0-2.5 mml ong; anther shorter than
ments filament，e llipsoid，l eather yellow，0 .8-1.0
5. Rhizome stoloniferous or short mml ong. Pistils 4.0-4.5 mml ong; stigmas
creeping...・・..…...・ ・-よ rohtangensis 1.2-1.4 mml ong; styles 0.5 mml ong; ova-
H H
5. Rhizomes densely branched，p lants ries ovoid-trigonous，3. 5-4.0 mml ong，1 .2-
caespitose.... ・. ・...・ ・-….J. longiflorus 1.5m mw ide. Seed fusiform，0 .8-1.0m m
H H
2. Basal leaves 2o r 3; lowest bract as long long，0 .20-0.26 mmw ide.
as or just exceeding flowers，l anceolate Distribution: Nepal and China (Yunnan).
… ・・-…よ uniflorus Additional specimens examined: Yunnan: In tergi
H H
inter vicos Haba et Dugwan-twun ad austro-orient.
1) Ju ncus biglumoides H.Hara in J. Jpn . pagi Dschungdien regione， alt. 3850 m (Handel-
Mazzetti 6902，22 Jun. 1915，S) ; Weixi，K angpu，al t.
Bot. 49: 201 (1974); H.Hara & a ，.l Enum.
3500 m (Chi-Wu Wang 64538，2 2 Jul. 1935，K UN-
Flow. Pl. Nepal 1: 84 (1978). [Fig. 1]
paratype of Juncus kangpuensis K.F.Wu); Zhongdian，
Type: Nepal. Rambrong，L amjung Himal， Around Mt. Hongshan，al t. 4200 m (Wu et al. 103044，
12000 ft. (Stainton，S ykes & Williams 6029， 2A ug. 1999，K UN，TI ).
29 Jun. 1954，B M-holo!，G H，TI -iso!). Juncus biglumoides is similar to よ
Juncus kangpuensis K.F.Wu in Acta bηophilus Noltie andよ haraeMiyam. &
Phytotax. Sin. 32: 443，f. 1，1 -5 (1994)，sy n. H.Ohba，bu t differs in having the stamens as
nov. long as or slightly longer than the perianth.
Type: China. Yunnan，W eixi，K angpu，al t. Juncus kangpuensis K.F. Wu，d escribed
3500 m (Chi-Wu Wang 64511，2 2 Jul. 1935， from two specimens collected in Weixi in
PE-holo!，G H，K UN-iso!). Yunnan， China， is identical with よ
Juncus biglumis auct. non L.: Samuelsson biglumoides.
in Hand.-Mazz.，S ymb. Sin. 7: 1238 (1936).
Rhizomes very short. Flowering stems 2) Juncus bryophilus Noltie in Edinburgh J.
erect，mu lti grooved，1 0-20 cm long，0 .4-0.7 Bot. 51: 137，f. lF-K (1994); Fl. Bhutan 3
mmw ide，wi th lor 2b asal sheaths and 1-3 (1): 271 (1994). [Fig. 2]
basal leaves. Leaves terete，m ulti grooved， Type: Bhutan. Upper Mo Chu District，
auricles rounded，b asal leaves 3-9 cm long， ridge above Laya，o n wet rock ledge，a lt.
0.7-1.2 mmw ide; sheaths 2-3 cm long， 4450 m (Sinclair & Long 52717b，2 1 Sept.
acute; leaves on sterile shoots 2-5 cm long， 1984，E -holo，p hoto !).
0.3-0.6 mmw ide，s heaths 1-2 cm long. Juncus harae auct. non Miyam. &
Inflorescence solitary，ps eudolateral，fl owers H.Ohba: Miyam. in Contr. Fl. Ganesh Him.:
1-3，br acts 2，s heathing bract absent，l owest 67 (1999).
bract stem like，a ppeingas ac ontinuation Rhizomes very short. Flowering stems
紅
of the stem，1 -3 cm long. 0.8-1.1m mw ide， slender，as cending，te rete，si ngle grooved，2 -
grass green. Flowers 0.3-0.7cm long，2 -3 9c m long，0. 3-0.5 mmw ide，wi th one basal
平成14年2月
26 植物研究雑誌第77巻第l号
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Fig. 1. Juncus biglumoides H.H紅a.(Stainton et al. 6029). 1: Habit. 2: Inflorescence. 3:
Outer perianth and stamen. 4: Inner perianth and stamen. 5: Perianth with ova巧人 6:
Cross section of ovary. 7: Auricle of basal leaf. 8: Cross section of upper ptof
紅
stem. 9: Cross section of lower part of stem. 10: Cross section of basal leaf. 11:
Cross section of lowest bract. Scales: a( 2 cm) for 1; b( 4 mm) for 2; c( 2 mm) for
3，4 ，5 a nd 7; d( 1 mm) for 6; e( 0.5 mm) for 8，9 ，1 0 and 11.
February 2002 Journal of Japanese Botany Vo .l77 No. 1 27
Fig. 2. Juncus bryophilus Noltie. (Miyamoto et al. 9410195). 1: Habit. 2: Inflorescence. 3:
Outer perianth and stamen. 4: Inner perianth and stamen. 5: Ovary. 6: Cross section of
ovary. 7: Cross section of middle part of stem. 8: Cross section of basal leaf. 9: Cross
section of lowest bract. 10. Seed. Scales: a(2 cm) for 1; b(4 mm) for 2; c(2 mm) for
3，4 a nd 5; d(l mm) for 6; e(0 .5 mm) for 7，8 a nd 9; f(0 .5 mm) for 10.
sheath and one basal leaf or sometimes ab- 1.4 mml ong; styles 0.3-0.4 mml ong; ova-
sen .t Leave~ terete， complanate， auricles ries ovoid-trigonous，3. 5-4.0 mml ong，1 .2-
rounded，ba sal leaves 0.5-4.0 cm long，0 .4- 1.6 mmw ide. Seeds fusiform，0 .8-1.0 mm
0.5 mmw ide，g rass green; sheaths 2-3 mm long，0 .20-0.26 mmw ide.
long，b rown; leaves on sterile shoots，1 -10 Distribution: Nepal，S ikkim and Bhutan.
cml ong，0. 3-0.6 mmw ide，s heaths 4-6 mm. Additional specimens examined: Nepal: Bagmati
Inflorescence solitary，ps eudolateral; flowers Zone，R asuwa Dist ，.raK harka-Pati Kharka，2 80 15'
1o r 2(-3); bracts 2，s heathing bract absent， N，85 0 lO'E，al .t3650 m( Miyamoto et al. 9410195，4
Aug. 1994，TI ). Sikkim: Dzongri，al t. 4000 m (ESIK
lowest bract stem like，a ppearing as ac on-
698，2 5 Jul. 1992，E ，T I-paratype ofよ bryophilus
tinuation of the stem，0 .5-2.5 cm long. 0.6- Noltie). Bhutan: Wangdi Phodrang Dist ，.rMaorothang-
0.8 mmw ide，g rass green. Flowers 2.5-5.0 Tintatso，2 70 39'N，9 00 31 'E，al t. 3700 m( Miyamoto
mml ong，1 .6-2.0 mmw ide; flower sessile if 9361571，20 Sept. 1993，TI ).
solitary，pe duncle 0.4-0.5 mml ong; perianth Juncus bryophilus is similar to J. harae
parts lanceolate，ou ter perianth parts slightly Miyam. & H.Ohba and J. uniflorus
longer than inner，3 .2-3.7 mml ong，0 .9-1.0 W.W.Sm.，bu t differs in having the filaments
mmw ide，i nner perianth parts 3.0-3.5 mm longer than the anthers. This species is dis-
long，0 .7-1.0m mw ide，b rown. Stamens 6， tributed disjunctly in central Nepal，S ikkim
shorter than perianth，2 .2-2.5 mml ong; fila and Bhutan.
幽
ment 1.4-1.6 mml ong; anther shorter than
filament，e llipsoid，l eather yellow，0 .6-0.7 3) Juncus duthiei (C.B.Clarke) Noltie in
mml ong. Pistils 4-5 mml ong; stigmas 1.2- Edinburgh 1. Bo .t51: 134 (1994). Simpson
28 植物研究雑誌第77巻第1号 平成14年2月
&N oltie in Kew Bull. 50: 169-170 (1995). 20 Jul. 1882，K -holo!).
[Fig. 3] Rhizomes very short. Flowering stems
Microschoenus duthiei C.B.Clarke in erect，t erete，0 .7-5.0 cm long，0 .5-0.7 mm
Hooker，F l. Brit. lndia 6: 675 (1894). wide，w ith 1o r 2b asal sheaths and 2b asal
Type: lndia. Uttar Pradesh，R hudughera， leaves. Leaves terete，au ricles rounded，ba sal
Tihri Garhwal，al t. 15-16000 ft. (Duthie 132， leaves 1-6 cm long，0 .4-0.7 mmw ide，gr ass
d f
ab ce
~]
13
Fig. 3. Juncus duthiei (C.B.Clarke) Noltie. (Takayama et al. 9220322). 1: Habit. 2:
Inflorescence. 3: Outer perianth and stamen. 4: Inner perianth and stamen. 5:
Flower. 6: Ovaη. 7: Capsule. 8: Cross section of ova巧r.9: Auricle of basalleaf.
10: Cross section of stem. 11: Cross section of lowest bract. 12: Cross section of
basalleaf. 13: Seed. Scales: a( 2 cm) for 1; b( 4 mm) for 2a nd 9; c( 2 mm) for
3，4 ，5 ，6 a nd 7; d( 1 mm) for 8; e( 0.5 mm) for 10，11 and 12; f( 0.5 mm) for
13.
February 2002 Journal of Japanese Botany Vol. 77 No. 1 29
green; sheaths 3-5 mml ong，b rown; leaves Type: Nepal. Koshi Zone， Sankhuwa
on sterile shoots，1 -4 cm long，0 .3-0.6 mm Sabha Dist ，.r Sano Pokhari-Khongma，a lt.
wide，s heaths 3-4 mml ong. Inflorescence 3850 m (M. Minaki，C . Yonebayashi，F .
solitary，ps eudolateral; flowers 1-3; bracts 2， Miyamoto，H . Takayama， H. Sugita， H.
longer than flowers，s heathing bract absent; Yagi，N . Subedi & H. Ikeda 9020853，1 2
lowest bract 0.8-2.3 cm long. 0.6-0.8 mm Aug. 1990，TI -holo!).
wide，gr ass green. Flowers 0.5-0.9 cm long， Rhizomes very short. Flowering stems
1.5-2.0 mm wide; peduncle 0.6-3.5 mm slender， ascending， complanate， multi
long; perianth p tovate-lanceolate，o uter grooved，3 -25 cm long，0 .3-0.5 mmw ide，
紅
perianth parts cuspidate，2 .8-3.0 mml ong， with one basal sheaths and one basal leaf on
0.9-1.3 mmw ide，c hestnut brown. Stamens stems with normal flowers，ba sal leaf absent
6，s horter than perianth，2 .0-2.3 mml ong; on stems with viviparous flowers. Leaves
filament 1.5-1.7 mml ong; anther shorter complanate，a uricles rounded，b asal leaves
than filament，el lipsoid，le ather yellow，0 .4- 2-3 cm long， 0.2-0.4 mm wide， multi
0.5 mml ong. Pistils 3.8-4.2 mml ong; stig- grooved，g rass green; sheaths 1.0-1.5 mm
mas 1.2-1.4 mml ong; styles 0.2-0.3 mm long，s traw yellow; leaves on sterile shoots，
long; ovaries ovoid-trigonous，2 .8-3.4 mm 2-10 cm long，0 .2-0.4 mmw ide，s heaths
long， 1.2-1.3 mm wide. Seeds fusiform， 0.8-1.8 cm long. Inflorescences with normal
0.77-0.83 mml ong，0 .30-0.36 mmw ide. flowers solitary，p seudolateral; flowers 1，
Distribution: India and Nepal. bracts 2; inflorescences with viviparous
Additional specimen examined: Nepal: Bagmati flowers with 3-7 flowers. Sheathing bract
Zone，Ra suwa Distr.，ar ound base camp，28 0 13'09"N， absent on peduncle; lowest bracts longer
85037' 17"E，al t. 4920 m (Takayama et al. 9220322，21 than flowers，0 .5-3.0 cm long，0 .2-0.3 mm
July 1992，TI ).
wide，gr ass green. Flowers viviparous or non
Juncus duthiei was originally described
viviparous，s ometimes mixed. Normal flow-
under the monotypic genus Microschoenus，
ers 0.5-0.8 cm long，1 .2-1.5 mm wide;
Cyperaceae (Clarke 1894)，a nd was moved
peduncle 0.3-0.5 mml ong; perianth parts
to Juncus by Noltie (1994). Noltie (1994)
ovate-lanceolate，2 .8-4.0 mml ong，1. 0-1.3
noted that this species has the anthers longer
mmw ide，b rown. Stamens 6，s horter than
than the filaments，a l ong style (1.5-4.0 mm
perianth，2. 5-2.8 mml ong; filaments 0.8-0.9
long) and red stigma. However，w e checked
mml ong; anthers longer than filament，li n-
the type specimen and samples collected in
ear-ellipsoid，l eather yellow， 1.6-1.8 mm
central Nepal and found the anthers to be
long. Pistils 0.5-0.8 cm long; stigmas 2.8-
shorter than the filaments，t he styles very
3.0 mml ong，pa le yellow; styles 1.5-2.0 mm
short (0.2-0.3 mml ong) and the stigmas pale
long; ovaries ovoidtrigonous，2.8-3.0 mm
yellow. Wee xamined the specimens cited by 同
long，1 .2-1.5 mmw ide. Seeds 0.3-0.32 mm
No ltie (1994) and found that he identified
long，0. 9-1.1 mmw ide. Viviparous flowers
bothよ duthieiand J. rohtangensis as J.
2.5-3.8 mml ong，o ne inner perianth part
duthiei.
transformed into ap ropagule，in ner perianth
This species is most similar to よ
parts lanceolate，ar istatae，1 .8-2.5 mml ong，
bηlophilus，b ut differs in having the fila-
0.5-0.6 mmw ide，s tamens and ovyre-
ぽ
ments three times longer than the anthers and
duced.
ac hestnut brown perianth.
Distribution: Nepal，B hutan and China
(Yunnan).
4) Juncus harae Miyam. & H.Ohba in J.
Additional specimens examined: Nepal: Koshi
Jpn. Bot. 68: 27，f. 1( 1993). [Fig. 4]
Zone， Sankhuwa Sabha Distr.，K hongma-ChaDing
30 植物研究雑誌第77巻第1号 平成14年2月
10
8Whdv
~7 d
--- ab ce
Fig. 4. Juncus harae Miyam. & H.Ohba. (Minaki et al. 9020853). 1: Habi .t2:
Proliferous Inflorescence. 3: Proliferous flower. 4: Normal inflorescence. 5: Outer
perianth and stamen. 6: Inner perianth and stamen. 7: Ovary. 8: Cross section of
ovary. 9: Sheathing leaf. 10: Cross section of middle part of stem. Scales: a( 2 cm)
for 1; b( 4 mm) for 2，4 a nd 9; c( 2 mm) for 3，5，6a nd 7; d( 1 mm) for 8; e( 0.5 mm)
for 10.
Khark~， 270 40'N，8 70 lO'E，al t. 3570 m (Minaki et al. 9580051，2 2 Jul. 1995 TI). Bhutan: Wangdi Phodrang
9020629，5 A ug. 1990，T I); Bagmati Zone，Ra suwa Distr.，Ta mpetso-Tsonsothang，27 0 48'N，9 00 29'E，al .t
Dist ，.rYure Kharka-Tinbu Kharka，2 80 lO'N，8 50 13' 3900 m (Miyamoto 9361642，2 2 Sep .t1993，TI ); loc.
E，al t. 3700 m (Miyamoto et al. 9410057，2 6 Jul. 1994， ci ，.tTsonsothang-Tampetso，2 70 46'N，9 00 31 'E，al .t
TI); Sagarmatha Zone，S olukhumbu Dist ，.r Gnaula- 4000 m (Miyamoto 9361680，2 4 Sep .t1993，T I).
Pike，2 70 33'N，8 60 27'E，al .t3600 m (Miyamoto et al. China: Yunnan，Z hongdian，A round Beihai (M .tHaba
February 2002 Journal of Japanese Botany Vol. 77 No. 1 31
Xueshan)，al t. 4100 rn (Wu et al. 103082，9A ug. 1999， perianth parts ovate-lanceolate，1 .8-3.9 mm
KUN). long，0 .5-1.2 mmw ide，c hestnut brown.
This species is similar to J. rohtangensis， Stamens 6，s horter than perianth，1 .0-3.1
but differs in having the anthers twice as
mml ong; filaments 0.17-0.5 mml ong; an-
long as the filament and a pale yellow
ther longer than filament，l inear-ellipsoid，
st1gma. leather yellow，0 .83-:2.6 mml ong. Pistils
0.28-1.20 cm long; stigmas 0.9-4.0 mm，
5) Juncus rohtangensis Goel & Aswal in
red; styles 0.8-4.0 mml ong; ovaries ovoid-
Indian J. Forest. 10: 262，f. 1-8 (1987). trigonous，0 .9-4.5 mml ong，0 .4-2.0 mm
[Fig. 5]
wide. Seed fusiform，0. 5-1.0m ml ong，0. 13-
Type: India. Lahaul Spiti Distr.，R hotang
0.4 mmw ide.
Pass，a lt. 4000 m (Aswal 10554，2 7 Jul. Distribution: Nepal，I ndia，S ikkim，B hutan
1970，C DRI-holo n.v.，C AL-iso!).
and China (Tibet).
Juncus nigroviolaceus K.F.Wu in Acta
Additional specirnens exarnined: Nepal: Hong
Phytotax. Sin. 32: 448，f. 2，1 0-12 (1994).
Khola，27 0 30'N，8 60 45'E，al t. 14000 ft. (McCosh 353，
syn. nov. 2J ul. 1964，B M，T I); Lari，2 80 14'N，8 50 11 'E，al t.
Type: China. Xizang， Cona， 4300 m， 4650 rn (Yon 107，7 J ul. 1974，B M); Above Sauwala
Cheng-yih Wu & Shu-kun Chen 75-612 Khola，al t. 13000乱 (Staintonet al. 3582，22 Jul. 1954，
BM，C AL，G H，U PS); Mukutinath， alt. 3962 rn
(HNWP-holo，n. v.，K UN-iso!).
(Stainton & Williarns 1451，2 6 Jun. 1954，B M，U PS);
Juncus sikkimensis v紅 mηwnocephαalωuS Shiar Khola，w est of Churnje，al t. 12500 ft. (G紅白er
Hook.工， Fl. Brit. India 6: 399 (1892) syn. 1016，2 9 Jun. 1953，B M); Dhdkund，6 rniles E. of
nov. Tirnure，al t. 15500 ft. (Polunin 810，5 J ul. 1949，B M);
Type: Sikkim. Lachen; alt.11000-12000ft. 5r niles E. Tirnure，al t. 13500 ft. (Polunin 801，3 J ul.
1949，B M); Langtang Valley，al t. 15000 ft. (Polunin
(Hooker s.n.，2 0 Jun. 1849，K -holo!，B ，G H-
626，Ju n. 1949，B M); Rock shelter II-Gadje，al t. 3220-
iso!).
3950 rn (Kan泊&Malla 174837，2 5 Aug. 1969，
Juncus duthiei (C.B.Clarke) Noltie in
KATH，TI ); Mul Kharka，C hikirne Khola，al t. 3800-
Edinburgh J. Bot. 51: 134 (1994)，pr o. part. 4100 rn (Kanai et Shakya 676208，3 J ul. 1970，K ATH，
Juncus uniflorus Miyam. & H.Ohba in TI); Th訂epati，N. of Kathrnandu，al t. 3200 rn (Wilson
Alp. Fl. Jaljale Him.: 73 (1992)，pr o. part. & Phillips 163，2 7 Jun. 1973，K ); Janakpur Zone，
Rarnechhap Distr.，D ubikharka-Baula Pokhari，a lt.
Juncus uniflorus auct. non W.W.Sm.:
3720-4000 rn (Ohba et al. 8570328，9 J ul. 1985，T I);
Miyamoto in Contr. F .lGanesh Hima.: 69
Janakpur Zone，R arnechhap Distr.，C hhu-Ningrna-Jata
(1999). Pokhari，al t. 4040-4220 rn (Ohba et al. 8570426，1 2
Rhizomes stoloniferous or short creeping. Jul. 1985，TI ); Janakpur Zone，R arnechhap Dist ，.rJata
Flowering stems erect，t erete，1 -28 cml ong， Pokhari-a peak-a peak on northwest of Panch Pok-
0.3-0.8 mmw ide，ba sal sheaths 1o r 2，ba sal hari-Jata Pokhari，2 70 43'N，8 60 25'E，al t. 4220-4893
rn，( Suzuki et al. 8580308，1 6 Jul. 1985，TI ); Janakpur
leaf 1( or 2). Leaves terete，au ricles rounded，
Zone，R arnechhap Dist ，.rKoshing Kharka-Thare Og，
basalleaves 0.8-9.0 cm long，0 .4-0.75 mm
alt. 4000-4150 rn (Ohba et al. 8570732，2 2 Jul. 1985，
wide，g rass-green; sheaths 2-10 mml ong， TI); Koshi Zone，S ankhuwa Sabha Dis江， Khongrna-
brown; leaves on sterile shoots，1 -18 cm Cha Ding Kharka，2 70 40'N，8 70 10'E，al t. 4100 rn
long，0. 25-0.70 mmw ide，sh eaths 2-10 mm. (Minaki et al. 9020636，5 A ug. 1990，TI ); Koshi Zone，
Sankhuwa Sabha Distr.，A round Cha Ding Kharka，
Inflorescence solitary，ps eudolateral，fl owers
270 40'N， 870 10'E， alt. 3400 rn (Min北iet al.
1-3; bracts 2，l onger than flowers，s heathing
9020746，9 020822，9 Aug. 1990，T I); Koshi Zone，
bract absent; lowest bract 0.4-2.8 cm long， Sankhuwa Sabha Distr.，Ar ound Cha Ding Kharka .，alt.
0.4-0.8 mmw ide，gr ass green. Flowers 0.3- 4150 rn (Min北iet al. 9020824，9 Aug. 1990，T I);
1.4 cm long，1 .2-2.5 mmw ide; flower ses- Koshi Zone，S ankhuwa Sabha Distr.，J aljale Hirnal，
sile if solitary，p eduncle 0.6-2.5 mml ong; around Banduke，2 70 30'N，8 70 30'E，a lt. 4150 rn
32 植物研究雑誌第77巻第1号 平成14年2月
de
a bc
Fig. 5. Juncus rohtangensis Goel & Aswal. (Takayama et al. 9220175). 1: Habit. 2:
Inflorescence. 3: Outer perianth and stamen. 4: Inner perianth and stamen. 5: Perianth.
6: Pistil. 7: Cross section of ovary. 8: Auricle of basalleaf. 9: Cross section of lower part
of stem. 10: Cross section of upper part of stem. 11: Cross section of lower part of basal
leaf. 12: Cross section of upper ptof basal leaf. Scales: a( 2 cm) for 1; b( 4 mm) for
訂
2; c( 2 mm) for 3，4 ，5 a nd 6; d( l mm) for 7，9 ，1 0，11 ，1 2; e( 0.5 mm) for 8.
(Ohba et al. 9110215，9 110232，9 120193，2 5 July-3 (Takayama et al. 9220175，1 4 Jul. 1992，TI ); Bagm瓜i
Aug. 1991，TI ); Koshi Zone，S ankhuwa Sabha Dist ，.r Zone， Rasuwa Dist ，.r Around Base Camp，
Makalu Base Camp，2 70 48'N，8 70 06'E，al t. 4728 m 280 13'09"N，8 50 37'17"E，al t. 4920 m (Takayama
(Emery CH25，8 J ul. 1974，K) ; Bagmati Zone，R asuwa et al. 9220319，2 1，J ul. 1992，T I); Bagmati Zone，
Dist ，.r Kyangjin Kharka-Yala阻larka，alt. 4580 m Rasuwa Dist ，.rYala Kharka-Langtrang，al t. 4700 m
February 2002 Journal of Japanese Botany Vo .l77 No. 1 33
(Takayama et a .19220359，2 2 Ju .11992，TI ); Bagmati cal with J. rohtangensis.
Zone，R asuwa Dist ，.raround Tinbu Kharka，2 80 11 'N，
850 13'E，al t. 3750 m (Miyamoto et a .19410080，2 7
6) Juncus uniflorus W.W.Sm. in Rec. Bot.
Ju .11994，T I); Bagmati Zone，R asuwa Dist ，.r Tinbu
Surv. lndia 6: 104 (1914). Hara & a ，.lEnum.
Kharka-Tulo Bhera Kharka，2 80 12'N，8 50 14'E，al t.
4100 m (Miyamoto et al. 9410098，2 8 Ju1. 1994，TI ); Flow. Pl. Nepa1 1: 85 (1978). Noltie in
Bagmati Zone，R asuwa Dist ，.rTulo Bhera Kharka-Jai- Edinburgh 1. Bot. 51: 136 (1994); Fl. Bhutan
suli Kund，2 80 12'N，8 50 13'E，al .t4300 m (Miyamoto 3( 1): 270，f. 251 (1994). [Fig. 6]
et a1. 9410118，9 410119，3 0 Ju .11994，T I); Bagmati Type: Sikkim. Se-moo-do-ne about 2500
Zone，R asuwa Dist ，.r around Jaisuli Kund，2 80 11 'N，
ft. below the Je1ep La (i.e.，a bout 12000 ft.)，
850 l1'E，al t. 4500 m (Miyamoto et a .19410129，3 1
(King s.n.，2 2 Jun. 1882，K -1ecto! selected
Ju .11994，TI ); Bagmati Zone，R asuwa Distr.，G anesh
Base Camp-a Kharka，2 80 15'N，8 50 06'E，al t. 3860 m by Noltie in 1994，CA L-isolecto!).
(Miyamoto et a .1 9410250， 10 Aug. 1994 TI); Distribution: East Hima1aya (Nepal，
Sagarmatha Zone， Solukhumbu Dist ，.r around Sikkim and Bhutan).
Dudhkund，2 70 42'N，8 60 36'E，al t. 4500 m (Ohba et
Rhizomes very short. Flowering stems
a .18581207，2 7 Aug. 1985，T I); Sagarmatha Zone，
erect，t erete，1 -3 cm long，0 .2-0.3 mmw ide，
Solukhumbu Dist ，.r Rato Odara-Chhomalang Base
Camp，2 70 43'N，8 60 54'E，al t. 4600 m (Miyamoto et basal sheaths 1o r 2，b asal leaves 2o r 3.
a1. 9580282，1 1 Aug. 1995，T I); Sagarmatha Zone， Leaves terete，a uricles oblique，b asa1 1eaves
Solukhumbu Dist ，.r Chhomalang Base Camp-Seto 0.8-2.5 cm 10ng，0 .25-0.32 mmw ide，gr ass
Pokhari，2 70 47'N，8 60 55'E，al .t4400 m (Miyamoto green; sheaths 2-5 mm1 0ng，b rown; 1eaves
et a .19580304，1 2 Aug. 1995，T I); Sagarmatha Zone，
on steri1e shoots，1 -4 cm 10ng，0 .25-0.35
Solukhumbu Dist ，.r Chhomalang Base Camp-Rato
mm wide， sheaths 2-5 mm 10ng.
Odara，2 70 47'N，8 60 55'E，al t. 4600 m (Miyamoto et
a .19580347，1 8 Aug. 1995 TI); Bhalukhop，al t. 13400 lnflorescence solitary，p seudolateral，f lower
ft. (Shrestha et Joshi 292，2 4 Ju1. 1971，B M). Sikkim: solitary or sometimes 2，br acts 2，as long as
Chakung Chu，al t. 13000白.(Smith 3854，2 6 Ju .11910， or just exceeding flowers，s heathing bract
K-syntype of Juncus uniflorus); Choktse (King s.n.，
absent; 10west bract 0.25-0.45c m long. 0.4-
Jun. 1887，C AL，K ); Zumu Valley (Smith & Cave
0.8 mmw ide，b rown. F10wers 0.30-0.55 cm
2808，2 0 Ju .11909，C AL); Dzongri，a lt. 4000 m
(Starling et a .1AGSES268，2 J u .11983，K ). Bhutan: 10ng， 1.0-1.5 mm wide; sessi1e; perianth
Chesha La，al t. 14000 ft. (Ludlow et a .116647，2 7 Jun. parts lanceolate，1 .8-3.0 mml ong，0 .4-0.6
1949，B M); Wangdi Phodrang Dist ，.r Maorothang- mmw ide，b rown. Stamens 6，s horter than
Tintatso，2 70 39'N，9 00 31 'E，al .t4000 m (Miyamoto perianth，1. 0- 1.7m ml ong; fi1aments 0.24-
9361566，2 0 Sept. 1993，TI ); Wangdi Phodrang Dist ，.r
0.70 mml ong; anther longer than fi1ament，
Tintatso-Tampe La，2 70 43 'N，9 00 31 'E，al .t4200 m
linear-ellipsoid，le ather yellow，0. 36-1.0 mm
(Miyamoto 9361592，2 1 Sept. 1993，T I); Wangdi
Phodrang Dist ，.rTampe La，2 70 44'N，9 00 31 'E，al .t long. Pistils 0.28-0.52 cm 10ng; stigmas 0.8-
4500 m (Miyamoto 9361607，9 361611，9 361612，2 1 1.2 mm; sty1es 0.8-1.0 mm1 0ng; ovaries
Sept. 1993，T I). Tibet: Chumbi，D otha，al t. 13000 ft. ovoid-trigonous，1 .2-3.5 mml ong，0 .5-1.5
(Bor & Ram 20510，2 0 Jun. 1945，K ). mmw ide. Seeds fusiform，0. 5-0.6 mml ong，
This species is very variable in size.
0.30-0.33 mmw ide.
Dwarf individua1s are simi1ar toよuniflorus，
Additional specimens examined: Nepal: Koshi
but differ from them in having the anthers
zone， Sankhuwa Sabha Distr.， Around Cha Ding
five times 10nger than the fi1aments，th e 10w- Kharka，2 70 40'N，8 70 10'E，al t. 4150 m (Minaki et a .1
est bract grass green and exceeding the flow- 9020823，9 A ug. 1990，TI ); Arun-Tarnur watershed，S.
ers and the perianth chestnut brown. Larger of Topke Gola，1 3000 ft. (Stainton 872，7 J u .11956，
plants are similar to Juncus sikkimensis BM，TI ). Sikkim: Above Changu，al t. 12000 ft. (Smith
3202，8 J u .11910，K ); Sherad Mang，al t. 12000-l3000
Hook.f.， but differ in 1acking sheath-1ike
ft. (Cooper 307， 18 Ju .1 1913，B M， S). Bhutan:
bracts. Juncus sikkimensis var. monocepha-
Shingbe，M eL a，al t. 12000 ft. (Ludlow et a1. 20693，3
lus Hook.f，d escribed from Sikkim，is identi- Jun. 1949，B M，G H，U PS); Pajoding，a bove Thirnphu，
