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Pellionia laibinensis, a new species of Urticaceae from Guangxi

来宾赤车, 广西荨麻科一新种



全 文 :  Guihaia  Jun. 2016ꎬ 36 (增刊 1): 209-210
http: / / journal.gxzw.gxib.cn
http: / / www.guihaia-journal.com
【原文刊载】 “来宾赤车ꎬ 广西荨麻科一新种” 已于 “中国知网 (CNKI)” 单篇优先数字出版ꎬ «广西植物»待刊ꎮ
来宾赤车ꎬ 广西荨麻科一新种
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: 描述了自广西发现的荨麻科赤车属一新种ꎬ来宾赤车ꎮ 此种与特产云南东南部的富宁赤车相近缘ꎬ
与后者的区别在于本种茎的毛开展或向上弯曲ꎬ叶片长椭圆形ꎬ基部斜楔形ꎬ雌花具 3~ 4 枚花被片ꎬ其中 1~ 2
枚较大花被片在背面顶端具一长筒状突起ꎮ
关键词: 荨麻科ꎬ 赤车属ꎬ 新种ꎬ 广西
中图分类号: Q949     文献标识码: A    文章编号: 1000 ̄3142(2016)增刊 1 ̄0209 ̄02
Pellionia laibinensisꎬ a new species of
Urticaceae from Guangxi
WANG Wen ̄Tsai
( State Key Laboratory of Systematic and Evolutionary Botanyꎬ Institute of Botanyꎬ
Chinese Academy of Sciencesꎬ Beijing 100093ꎬ China )
Abstract: A species of the genus Pellionia (Urticaceae)ꎬ P. laibinensisꎬ is described as new from Guangxi Zhuang Autono ̄
mous Region. It is related to P. funingensis W. T. Wangꎬ endemic to Southeast Yunnan Provinceꎬ and from the latter differs
in its stemꎬ which is covered with spreading or antrorsely curved hairsꎬ its long elliptic leaf blade with obliquely cuneate
baseꎬ its pistillate flower with 5 tepalsꎬ and the 1 or 2 larger tepals of them abaxially from apex with one tubular
projection.
Key words: Urticaceaeꎬ Pellioniaꎬ new speciesꎬ Guangxi
    来宾楼梯草  图 1
Pellionia laibinensis W. T. Wangꎬ sp. nov.
Fig. 1.
(Sect.Pellionia subsect. Radicantes W. T. Wang
ser. Redicantes W. T. Wang)
Ob foliorum laminas apice longe acuminatas semi ̄
triplinervesꎬ folia reducta nullaꎬ stipulas subulatasꎬ te ̄
pala pistillata valde inaequimagna 1 vel 2 majora apice
projecturis longis praeditaꎬ achenia tuberculata species
nova haec est affinis P. funingensi W. T. Wangꎬ a qua
caule pilis patentibus vel antrorse curvatis obtectoꎬ foli ̄
orum laminis longe ellipticis basi oblique cuneatisꎬ flore
pistillato tepalis 3 vel 4 praeditoꎬ eis 1 vel 2 majoribus
dorso apice longe 1 ̄tubulari ̄projectis differt. In P. fun ̄
ingensiꎬ caules pilis retrorse curvatis obtectiꎬ foliorum
laminae ellipticae basi latere latiore auriculataeꎬ flos
pistillatus tepalis 5 praeditusꎬ et tepela 2 majora dorso
apice longe tenuiter 1 ̄corniculata sunt.
Perennial herb. Stem ca. 25 cm tallꎬ near base
ca. 2 mm in diam.ꎬ above densely below sparsely hirtel ̄
收稿日期: 2016 ̄05 ̄25     修回日期: 2016 ̄06 ̄14
作者简介: 王文采(1926 ̄)ꎬ男ꎬ研究员ꎬ中国科学院院士ꎬ著名植物分类学家ꎬ长期从事有花植物分类学研究ꎮ
图 1  来宾赤车  A. 开花雌茎上部ꎻ B. 雌聚伞花序(下面观)ꎻ CꎬD. 雌花ꎻ E. 瘦果ꎮ
Fig. 1  Pellionia laibinensis  A. Upper part of flowering pistillate stemꎻ B. Pistillate cymeꎬ seen
from beneathꎻ Cꎬ D. Pistillate flowersꎻ E. Achene. (from holotype)
lous (hairs spreading or antrorsely curvedꎬ 0.1-0.2 mm
long)ꎬ with a few short branches. Leaves alternateꎬ
shortly petiolate or sessileꎻ blades paperyꎬ long elliptic
or oblanceolateꎬ 3-10.5 × 1.2-2.8 cmꎬ apex long acu ̄
minateꎬ base obliquely cuneateꎬ margin denticulateꎻ
surfaces adaxially glabrousꎬ abaxially on nerves densely
strigilloseꎻ nervation semi ̄triplinervedꎬ with secondary
nerves 2-3 at leaf narrow side and 4 at broad sideꎻ cys ̄
toliths sparseꎬ not conspicuousꎬ bacilliformꎬ 0. 2 - 0. 4
mm longꎻ petioles 0-2.5 mm longꎻ stipules linear ̄trian ̄
gular or subulateꎬ 1 - 2. 5 × 0. 2 - 0. 3 mmꎬ glabrous.
Staminate cymes and staminate flowers unknown.
Pistillate cymes singly axillaryꎬ 3-5 mm in diam.ꎬ shortly
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012 广  西  植  物                                      36卷