A Taxonomic Note on Sinocrassula paoshingensis (S. H. Fu) H. Ohba et a1. and Sedum indicum (Decne.) Berger var. luteorubrum Praeger (Crassulaceae)

7 Pages·2000·1.2 MB·English

by  Hideaki Ohba

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A Taxonomic Note on Sinocrassula paoshingensis (S.H.Fu)
H.Ohba et al. and Sedum indicum (Decne.) Berger
var. luteorubrum Praeger (Crassulaceae)
Hideaki OHBAa，S hinobu AKIYAMAb and Su-kung Wuc
aDepartment of Botany，Un iversity Museum，Un iversity of Tokyo，Ho ngo 7-3-1，Bu nkyoku，To kyo，11 3-0033 JAPAN;
“
bDepartment of Botany，Na tional Science Museum，To kyo，Am akubo 4-1-1，Ts ukuba，30 5-0005 JAPAN;
CKunming Institute of Botany，Ac ademia Sinica，Ku nming，Yu nnan 650204，CH INA
(Received on June 7，2 000)
A new combination， Sinocrassula paoshingensis， is proposed. Sinocrassulα
paoshingensis is distinguishable from S. indica (Decne.) Berger by its oblong flowers，
straight petals with recurved apex and dorsally unswollen ovaries. Sedum indicum var.
luteorubrum Praeger is regarded as as ynonym of Sinocrassula paoshingensis.
Key words: Crassulaceae，fl ora of China，n ew combination，S edum paoshingensis，ta xon-
omy
Sinocrassula paoshingensis (S.H.Fu) H. stems from center of ar osette，s traight or
Ohba，S .Akiyama & S.K.Wu，c omb. nov. straight from a procumbent base，6 -20 cm
[Figs. 1，2 ，3 a，3 b，4] tall， terete， smooth， pale green. Cauline
Sedum 的indiαcuηm，1 (Decne.) Raym leaves altemate，s ucculent，e lliptic to linear，
v紅ar.luteorublumPraeger in Notes Bot. Gard. to 1.3 cm long，t o 3m mw ide，a pex spinu-
舟
Edinburgh 13: 84 (1921). lose，b ase cuneate to round; fallen leaves
Sinocrassula indicα(Decne.) Berger var. rooting at base. Inflorescences terminal，
luteorubra (Praeger) S.H.Fu in Fl. Reipubl. ne lyflat topped cymes，1 0-40-flowered，
訂
Popularis Sin. 34(1): 68 (1984). bracteate or ebracteate; bracts 1-6 mml ong，
Sedum paoshinense S.H.Fu in Acta Phyto- linear. Flowers in August， oblong，
tax. Sin. Add. 1: 114 (1965); in Fl. Reipubl. pedicellate; pedicels 0.7-3(-5) mm long.
Pop. Sin. 34(1): 74 (1984). K.T.Fu in Wang， Calyx tube ca. 1m ml ong; lobes 5，sp urless，
Vasc. Pl. Hengduan Mts. 1: 665 (1993). narrowly triangular to subulate，3 -4.2 mm
Sinocrassula indica auct. non (Decne.) long，b ase 1-1.7 mmw ide，a pex tapering，
Berger: H. Ohba in J. Jap. Bot. 67: 196 with obtuse tip，e rect through flowering.
(1992). Petals 5，li near to narrowly oblong or linear
Sinocrassula luteorubrum (Praeger) H. lanceolate，4 -5.4 mml ong，1 -1.5 mmw ide，
Chuang in Fl. Yunnan. 8: 142 (1997)，n om. apex apiculate，e rect throughout flowering，
invalid. with reflexed apex. Stamens 5，a ltemate pet-
Perennial glabrous herbs with rosettes. als，s lightly shorter than petals; filaments
Rosulate leaves succulent，w idely elliptic to erect，3 -4 mml ong; anthers basifixed，o b-
elliptic，t o 1c m long，t o 5m mw ide，a pex long， cream colored before dehiscence.
spinulose，b ase cuneate to round. Flowering Nectaries 5，o pposite petals，w idely oblong
司，』 LU
October 2000 Journal of Japanese Botany Vo .l75 No. 5 297
to squ訂e，ca. 0.7 mm long，0 .5-0.7 mm Lijiang Xian: Hutiaojian，1 900 m (Ohba et al. 664，9
wide. Ovaries 3.5-4.2 mml ong，ba se slightly Sept. 1987，K UN，T I); Lijiang-Ganhaizi，2 750-2800
connate on ventral side，n ot swollen on dor- m (Ohba et al. 829，1 5 Sept. 1987，K UN，T I); Shudi，
1550-1750 m (Iwatsuki et al. 1897，7O ct. 1987，K UN，
sal side，t apering; styles indistinguishable;
TI); Tuagshan，2 350-2600 m (Ohba et a .l1883，6 O ct.
stigma papillate; ovules ca. 50 in each
1987，K UN，TI );Y uhu，2 600-2650 m (Ohba et al. 823，
locule. Follicles not observed. 14 Sept. 1987，K UN，TI ).
Specimens examined.C hina. Sichuan.D aocheng Sinocrassula paoshingensis，d escribed (as
Xian: Gongling-Riwa-Gonnga Zhongu (Wu et al. 848， Sedum paoshingense) on the basis of as ingle
2A ug.1 997，K UN，TI ). Garlung Xian: Puchang，7 00 collection by S. H. Fu from Paoshing (=
m (Unknown collector 14335，P E). Yunnan.D eqin
Baoxing)，S ichuan Province，C hina in 1933
Xian: Meili Xueshan，S uola to Melishi，2 950 m (Wu
(Fu，1 965)，is the type species of section
et al. 103555，2 4 Aug. 1999，K UN，TI ).
Sinocrassula indica (Decne.) Berger in Sinosedum (Fu，1 965). Ohba (1992) studied
Engl. & Prant ，.l Nat. Pflanzenfam. 2 Auf. a second collection，w hich was found at
18a: 463 (1930). S.H.Fu in Fl. Reipubl. Pop. Puchang at an elevation of 700 m，G arlung
Sin. 34(1): 66 (1984); in Wang，V asc. Pl. Xian，S ichuan，b y an unknown collector (no.
14335 in PE) and，b ased on morphological
Hengduan Mts. 1: 657 (1993).
characters， treated the species as falling
Specimens examined. China. Yunnan.D ali Shi:・
Fongho stream on the eastern slope of Dianchang within the range of variation of Sinocrassula
Shan，2 000-2400 m (Kato & Akiyama 1921，9 A ug. indica (Decne.) Berger.
1988). Deqin Xian: Meili Xueshan，S uola to Melishi， In 1997 Akiyama and Wuf ound plants re-
2750 m (Wu et a .l103557，2 4 Aug. 1999，K UN，TI ). sembling Sinocrassula paoshingensis in
Fig.1. Sinocrassula paoshingensis H.Ohba，S .Akiyama & S.K.Wu.a: Sichuan Prov. in August 1997.b:
Yunnan Prov. in August 1999.
298 植物研究雑誌第75巻第5号 平成12年10月
Sichuan and in 1999 in Yunnan (Fig. 1). rosulate leaves at the base of flowering stem
Those plants have vegetative and floral fea- at flowering time，bu t they have af ew small
tures that exactly co'espondto those of rosettes in the leafaxils located near the
町
Sinocrassulαpαoshingensis. The plants lacks ground (Fig. 2). These axillary rosettes
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令告 主主要
Fig. 2. SinocTiωsula paoshingensis H.Ohba，S .Akiyama & S.K.Wu( Wu et al. 103555，TI ).
October 2000 Journal of Japanese Botany Vo .l75 No. 5 299
undoubtedly remain after the f10wering stem leaves are easily detached when touched，s o
disappears. This seems to be ac ommon fea- the pressed plants have almost no leaves
ture in Sinoc，rαssula paoshingensis because (Fig. 2). In contrast，Si nocrassula indica has
the specimen deposited in PE (no. 14335) ap rominent rosette of leaves at the base of
also has no rosulate leaves at the base of the the f10wering stem，e ven in fruit，a nd bears
f10wering stems. Moreover， the cauline cauline leaves when dried (Fig. 3c).
Fig. 3. Inflorescences of Sinocrassula paoshingensis (a，b: Wue t al. 103555) and S. indica (c-e: Wu
et al. 103557).
300 植物研究雑誌第75巻第5号 平成12年10月
Although Ohba (1992) wrote that the flo- S. paoshingensis，S. paoshingensis is appar-
ral and vegetative features were not useful to ently different from S. indica. It became ap-
distinguish between Sinocrassula indica and p entthrough our field observations in the
訂
mO
-
E -
/
f
l

Fig. 4. Sinocrassula paoshingensis H.Ohba，S .Akiyama &S .K.Wu( a-f: Wue t al. 848. g-m: Wu
et a .l103555). a，g: Flowers. b，h: Ovaries. c，i: Sepals. d，j ，k: Petals G: lateral view). e， :1
Stamens. f，m : Nectaries. Bar indicates 1m m.
October 2000 Journal of Japanese Botany Vo .l75 No. 5 301
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Fig. 5. Sinocrassula indica (Decne.) Berger (Wu et al. 103557). a: Flower. b，c: Ovaries. d: Sepal.
e: Petal. f: Stamen. g: Nectary. Bar indicates 1r nrn.
Sino-Himalayan region that the extemal ap- those of S. indicα eessentially dull red
紅
pearance and floral features illustrated in with some variation. A plant collected in
Ohba's paper (1992) ebeyond the varia- Deqin Xian，Y unnan，in 1999 (same locality
訂
tion ranges of Sinocrassula indica. In S. of Sinocrassula paoshingensis) has petals
paoshingensis the flowers are disposed in a that are green outside and dull reddish inside.
compact almost flat topped cymose inflores- The ovaries of Sinocrassula paoshingensis
cence and have pedicels 0.7-3(-5) mml ong are slender (Figs. 4b，h) but dorsally rounded
and bracts 1-6 mm long， or are often in Sinocrassula indica (Figs. 5b，c ). The
ebractate (Figs. 3a，b) . The inflorescences of haplostemonous flowers place Sinocrassula
Sinocrassula indica are more or less paoshingensis in the genus Sinocrassula，a s
paniculate with leafy bracts (to 1.5 cm long) pointed out by Ohba (1992). Within
and pedicels 3-5 mm long (Figs. 3d，e ). Sinocrassula S. paoshingensis is distinguish-
Sinocrassula paoshingensis has straight， able from all other species. Sinocrassula
erect petals reflexed at the apex and paoshingensis resembles Sinocrassula
unswollen nrowovaries which make the ambigua (Praeger) Berger，b ut differs by
紅
outline of the flower oblong (Figs. 1，4 a，g) . having sepals shorter than the petals，
Sinocrassulα indicαdiffers in having acuminate leaves 3.5-5 mm long， and
，
globose-urceolate flowers (Fig. 5a). The pet- oblanceolate to linear basal leaves.
als of Sinocrassula paoshingensis elinear- Sinocrαssula indica (Decne.) Berger var.
紅 ，
subulate to narrowly oblong (Figs. 4d，j， k) luteorubra (Praeger) S.H.Fu，w hich was col-
but not lanceolate to ovate as in Sinocrassula lected on the Mekong-Salwin divide (in Lat.
indica (Fig. 5e). The petals of Sinocrassula 280 10' N) by G. Forrest (no. 13377). in
paoshingensis is whitish inside with ar ose 1914，is considered to be identical with Sino
・
carmine apex and rose carmine outside (pale crassula paoshingensis. Praeger (1921) char-
greenish cream when dried) (Fig. 1) while acterized the varietv by itse umbellate
302 植物研究雑誌第75巻第5号 平成12年10月
inflorescence and the oblong，s traight，e rect members of the botanical research teams of
petals. Compared with type and the second the University of Tokyo and the Kunming
collection illustrated by Ohba (1992) of Institute of Botany in 1997 and 1999 for
Sinocrassula paoshingensis， Sinocrassula their help in the field. This study was sup-
indica v紅.luteorubra has more branched ported by Grants-in-Aid for Monbusho
compact inflorescences，b ut the density of International Scientific Research Program:
the flowers and braching seems to be vari- Field Research from the Ministry of
able. Akiyama and Wu collected Education， Science， Sports， and Culture，
Sinocrassula paoshingensis in Yunnan very Japan in 1997 (to H. 0.)，a nd for Scientific
near the type locality of the variety. Research (A) from Japan Society for the
Zhuang (Chuang) (1997) used the name Promotion of Science，no . 11691178 in 1999
Sinocrassula luteorubrα(Prager) H. Chuang and 2000 (to H. 0ふ
without direct reference to the basionym.
This combination is unfortunately invalid References
under Article 33.1 of the International Code Fu S. H. 1965. Species et combinationes novae
of Botanical Nomenclature (Tokyo Code Crassulacearum Sinicarum. Acta. Phytotax. Sin.
1994). Addit. 1: 111-128.
Ohba H. 1992. Notulae Crassulacearum Asiae
Orientalis (1). J. Jap. Bot. 67: 194-200.
We eindebted to Dr. David E. Boufford，
訂 Praeger R. L. 1921. Some Asiatic sedums in the
the Harvard University Herbaria，fo r reading Edinburgh herbarium，w ith supplement訂ynotes
the manuscript. Wet hank the curator of the from Kew and the British Museum. Notes Roy.
Herbarium，L aboratory of Systβmatic and Bot. Gard. Edinburgh 13: 67-101，pl s. 170-179.
Zhuang X. (Chuang H.) 1997. 45. Crassulaceae. In:
Evolutionary Botany，I nstitute of Botany，
Chen S. (edよ FloraYunnanica 8: 134-209.
Academia Sinica，B eijing for allowing us to
Science Press，Be ijing.
study their specimens. We thank also the
大場秀章 ，秋山忍 武素功 Sinocrassula
a b C:
paoshingensis (S.H.Fu) H.Ohba et al.とSedum
indicum (Decne.) Berger var. luteorubrum Praeger indicaから区別する上でのよい特徴となる.この
についての分類学的考察 種について先に雲南大学の庄司定は，雲南植物誌8
中国四川省から報告された Sedumpaoshingense 巻 (1997)で， Praegerが1921年に発表したSedum
S.H.Fuについての最初の研究で， Ohba (1992)は indicum var. luteorubrumを独立種と考察し
Sinocrassula indica (Decne.) Bergerの異名とした. Sinocrassula luteorubraという学名を提唱したが，
1997年に四川省稲城県， 1999年に雲南省徳欽県で basionymの出典が明示されておらず，これは有効
この植物を見出し その生育状況及び形態につい 発表とは認められない.また，庄礎は，この種が
て観察を行った.これらと採集した標本にもとづ Sedum paoshingenseと同種であることには気付か
いて考察した結果，Sedum paoshingense S.H.Fuは， なかった.この種について種のランクで最も早く
Sinocrassula indica (Decne.) Bergerの変異には含 有効に発表された種名である Sedumpaoshingense
まれない固有の特徴をもち，後者とは別種である にもとづいて，Sinocrassula paoshingensisを提唱
ことが明らかとなった.中でも，専筒部が短く， した (a東京大学総合研究博物館，
かっ花弁が長いため花が長楕円体状となること， 国立科学博物館植物研究部，
b
花弁は先端のみが外曲し，子房は背側が膨らまな c中国科学院見明植物研究所)
いこと，根生葉は花時には見られず，茎葉は接触
すると脱落しやすい点は この種を Sinocrassula