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A New Species of the Genus Clematis (Ranunculaceae) from Yunnan, China

马关铁线莲,云南毛茛科一新种



全 文 :马关铁线莲ꎬ 云南毛茛科一新种
王文采
(中国科学院植物研究所系统与进化植物学国家重点实验室ꎬ 北京  100093)
摘要: 描述了自云南发现的毛茛科铁线莲属一新种———马关铁线莲ꎬ 并给出其与近缘种的区别特征ꎮ
关键词: 毛茛科ꎻ 铁线莲属ꎻ 新种ꎻ 云南
中图分类号: Q 949              文献标志码: A              文章编号: 2095-0845(2015)02-139-02
A New Species of the Genus Clematis (Ranunculaceae)
from Yunnanꎬ China
WANG Wen ̄tsai
(State Key Laboratory of Systematic and Evolutionary Botanyꎬ Chinese Academy of Sciencesꎬ Beijing 100093ꎬ China)
Abstract: A species of the genus Clematis (Ranunculaceae)ꎬ C􀆰 maguanensisꎬ is described as new from Yunnan
Provinceꎬ Chinaꎬ and the diagnostic differences between it and its putative close ally are given.
Key words: Ranunculaceaeꎻ Clematisꎻ New speciesꎻ Yunnan
  Clematis maguanensis W􀆰 T. Wangꎬ sp. nov.
Fig􀆰 1
( Sect. Clematis subsect. Rectae Prantl ser.
Meyenianae Tamura)
Ob sepala patentiaꎬ stamina glabraꎬ antheras
lineares apice apiculatas et achenia margine haud tu ̄
mida species nova haec ad sect. Clamatidem subsect.
Rectas Prantl ser. Meyenianas Tamura pertinetꎬ et in
serie hac ea est affinis C􀆰 finetianae Lévl. & Vaniotꎬ
quae foliolis majoribus usque ad 10 (-15) cm longisꎬ
cymis 1-5 (-9) ̄florisꎬ acheniis fusiformibusꎬ et sty ̄
lis persistentibus fulvo ̄villosis facile differt.
Woody vines. Branches of the current year greenꎬ
subtereteꎬ ca. 3 mm in diam.ꎬ glabrousꎬ smoothꎬ in ̄
conspicuously longitudinally 6 ̄sulcate. Leaves oppo ̄
siteꎬ ternateꎬ glabrousꎻ leaflets coriaceousꎬ narrowly
ovate or ovateꎬ 2-7 cm longꎬ 0􀆰 7-2􀆰 8 cm broadꎬ at a ̄
pex acuminateꎬ at base roundedꎬ margin entireꎬ tri ̄
nervedꎬ with basal nerves adaxially flatꎬ inconspicu ̄
ousꎬ abaixally slightly prominentꎬ and with petiolules
0􀆰 4-2􀆰 4 cm longꎻ petioles 2-6􀆰 5 cm long. Cymes sin ̄
gly axillaryꎬ racemiformꎬ 8-15 cm longꎬ 7-15 ̄flow ̄
eredꎬ glabrousꎻ peduncles 3-6 cm longꎻ bracts narrow ̄
ly ovateꎬ lanceolate or linearꎬ 2􀆰 5-8 mm longꎬ 1-1􀆰 2
mm broadꎻ pedicels slenderꎬ 4-16 mm long. Flower
1􀆰 2 - 1􀆰 8 cm in diam. Sepals 4ꎬ spreadingꎬ whiteꎬ
lanceolate ̄linearꎬ 8 - 11􀆰 5 mm longꎬ 2 - 2􀆰 8 mm
broadꎬ apex slightly acuteꎬ adaxially glabrousꎬ abaxi ̄
ally on margin white ̄velutinousꎬ trinerved. Stamens
20-22ꎬ 5-8 mm longꎬ glabrousꎻ filaments narrowly
linearꎬ 1 - 3􀆰 5 mm longꎻ anthers linearꎬ 3 - 4 mm
longꎬ apex shortly apiculate. Carpels 6-7ꎬ ca. 5 mm
longꎻ ovaries broadly ellipsoidal ca. 1 mm longꎬ pu ̄
berulousꎻ styles ca. 4 mm longꎬ very densely white ̄
villous. Achenes dark ̄brownꎬ strongly compressedꎬ
ovate or broadly ellipticꎬ 4 - 5 mm longꎬ ca. 3 mm
broadꎬ margin rimmedꎬ not tumidꎻ persistent styles
slenderꎬ ca. 2􀆰 6 cm longꎬ spreading white ̄villous.
植 物 分 类 与 资 源 学 报  2015ꎬ 37 (2): 139~140
Plant Diversity and Resources                                    DOI: 10.7677 / ynzwyj201514081
Received date: 2014-05-22ꎬ Accepted date: 2014-09-15
作者简介: 王文采 (1926-) 男ꎬ 研究员ꎬ 中国科学院院士ꎬ 从事有花植物分类学研究ꎮ E ̄mail: xiaobao@ibcas􀆰 ac􀆰 cn
Fig􀆰 1  Clematis maguanensis  A. part of flowering stemꎻ B. sepalꎬ abaxial viewꎻ C. the same as Bꎬ adaxial viewꎻ D. stamensꎻ E. carpelꎻ
F. achene with persistent styleꎻ G. achene with its persistent style removed. (A-E from holotypeꎻ F-G from paratype)
    China: Yunnan Province: Maguan Xianꎬ Gu ̄
linqingꎬ Laofangziꎬ alt. 1 600 mꎬ on limestone sum ̄
mitꎬ vineꎬ fls. whiteꎬ 2003-06-20ꎬ Y􀆰 M. Shui et
al. 32178 ( holotypeꎬ PE)ꎻ same localityꎬ Qin ̄
glong Mt.ꎬ in the forest at the middle of limestone
hillꎬ 2002-10-15ꎬ Y􀆰 M. Shuiꎬ W􀆰 H. Chen & J􀆰 S.
Sheng 31477 (fr.ꎬ PE).
In having spreading sepalsꎬ glabrous stamensꎬ
linear anthers with apiculate apexesꎬ and achenes
without tumid margins this species should belong to
sect. Clematis subsect. Rectae ser. Meyenianae. In
this seriesꎬ it is related to C􀆰 finetianaꎬ but differs in
its smaller leafletsꎬ 7-15 ̄flowered cymesꎬ ovate or
broadly elliptic achenesꎬ and white ̄villous persistent
styles. In C􀆰 finetianaꎬ the leaflets are largerꎬ up to
10 (-15) cm longꎬ the cymes are 1-5 (-9) ̄flow ̄
eredꎬ the achenes are fusiform in outlineꎬ and the
persistent styles are tawny ̄villous (Wangꎬ 2003).
Acknowledgement: I am grateful to Mr. Sun Ying ̄Bao for
kindly making the line drawing.
Reference:
Wang WTꎬ 2003. A revision of Clematis sect. Clematis (Ranunculaceae)
[J] . Acta Phytotaxonomica Sinicaꎬ 41: 1—62ꎻ 97—172
041                                  植 物 分 类 与 资 源 学 报                            第 37卷