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Thalictrum yuexiense, a New Species of Ranunculaceae from Anhui Province, China

岳西唐松草, 安徽毛茛科一新种



全 文 :植物科学学报  2014ꎬ 32(6): 567~569
Plant Science Journal
    DOI:10􀆰 11913 / PSJ􀆰 2095-0837􀆰 2014􀆰 60567
岳西唐松草ꎬ安徽毛茛科一新种
王文采
(中国科学院植物研究所ꎬ 系统与进化植物学国家重点实验室ꎬ 北京 100093)
摘  要: 描述了自中国安徽省发现的毛茛科唐松草属一新种ꎬ 岳西唐松草 Thalictrum yuexienseꎬ 并给出了其与
近缘种尖叶唐松草的区别特征ꎮ
关键词: 毛茛科ꎻ 唐松草属ꎻ 新种ꎻ 安徽
中图分类号: Q949􀆰746􀆰5    文献标识码: A          文章编号: 2095 ̄0837(2014)06 ̄0567 ̄03
      收稿日期: 2014 ̄02 ̄12ꎬ 退修日期: 2014 ̄02 ̄25ꎮ
  作者简介: 王文采(1926-)ꎬ 男ꎬ 山东掖县人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
Thalictrum yuexienseꎬ a New Species of
Ranunculaceae from Anhui Provinceꎬ China
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 Thalictrum (Ranunculaceae)ꎬ T. yuexienseꎬ is described as
new from Anhui Provinceꎬ China. The diagnostic differences between the new species and its
closest allyꎬ T. acutifoliumꎬ are given.
Key words: Ranunculaceaeꎻ Thalictrumꎻ New speciesꎻ Anhui Province
岳西唐松草(图 1)
Thalictrum yuoxiense W􀆰T. Wangꎬ sp. nov.
Fig􀆰1(Sect. Leptostigma Boivin ser. Clavata W􀆰T.
Wang & S􀆰H. Wang) .
Species nova haec est affinis T. acutifolio
(Hand􀆰 ̄Mazz.) Boivinꎬ quod caulibus 25 - 65 cm
altisꎬ foliis basalibus 2 ̄ternatisꎬ foliolis majoribus
plerumque ovatis 2􀆰 3 -5 cm longis 1 -3 cm latisꎬ
staminum filamentis oblanceolatis antheris latiori ̄
busꎬ gynoecio ex carpellis 6 - 12 constanteꎬ ache ̄
niis plerumque anguste oblongis statim differt.
Small perennial herbs. Stems ca. 20 cm tallꎬ
above base ca. 1 mm acrossꎬ glabrousꎬ 1- 3 ̄
branched. Basal leaves ca. 2ꎬ 3 ̄ternateꎬ long
petiolateꎬ glabrousꎻ blades subpentagonal or
broadly rhombic in outlineꎬ 2􀆰 5 -5 × 4􀆰 5 -7 cmꎻ
leaflets shortly petiolulateꎬ paperyꎬ obovate or
narrowly obovateꎬ rarely broadly obovate or
ovateꎬ 0􀆰 6 - 1􀆰 3 × 0􀆰 4 - 0􀆰 9 cmꎬ base broadly
cuneateꎬ rarely roundedꎬ apex 3 ̄lobulateꎬ 3 ̄
dentate or 3 ̄lobed and few ̄dentateꎻ nervation 3 ̄
nervedꎬ with nerves adaxially flatꎬ abaxially in ̄
conspicuously prominentꎻ petioles 3 - 3􀆰 8 cm
longꎬ 0􀆰 8 - 1􀆰 2 mm across. Cauline leaves ca.
3ꎬ subsessileꎬ glabrousꎬ the uppermost one ter ̄
nateꎬ the other two 2 ̄ternateꎬ 1- 2􀆰 5 cm long.
Compound monochasia terminal to stem and bran ̄
chesꎬ subcorymbiformꎬ 5 - 8 ̄floweredꎻ bracts ter ̄
nateꎬ subsessileꎬ glabrousꎬ with leaflets obovate
or ovateꎬ 2􀆰 5 - 5 mm longꎬ 3 ̄denticulate or en ̄
tireꎻ bracteoles very shortly petiolateꎬ narrowly el ̄
lipticꎬ 1-2􀆰 5 mm longꎬ entireꎬ glabrousꎻ pedi ̄
cels 4-7 mm longꎬ glabrous. Flowers ca. 3􀆰 2 mm
in diam.: Sepals 4ꎬ caducousꎬ purple ̄redꎬ oblong ̄
A. 植株全形ꎻ B. 花(具未成熟心皮)ꎻ C. 萼片ꎻ D. 雄蕊ꎻ E. 雌蕊群ꎻ F. 瘦果ꎮ
A. Habitꎻ B. Flower with premature carpelsꎻ C. Sepalꎻ D. Stamenꎻ E. Gynoeciumꎻ F. Achene. (All from the holotype)
图 1  岳西唐松草
Fig􀆰 1  Thalictrum yuexiense
865 植 物 科 学 学 报 第 32卷 
ellipticꎬ ca. 1􀆰 6 × 0􀆰 4 mmꎬ glabrousꎬ apex
roundedꎬ base broadly cuneateꎬ basal nerves 3ꎬ
claws ca. 0􀆰 3 mm long. Stamens 20 - 24ꎬ gla ̄
brousꎻ filaments whiteꎬ narrowly oblanceolateꎬ
below filiformꎬ ca. 3 mm longꎬ nearly as broad as
anthersꎻ anthers yellowishꎬ oblongꎬ 0􀆰 6 - 1 mm
long. Carpels (2-)3- 5ꎬ glabrousꎻ carpophores
0􀆰 5 - 0􀆰 8 mm longꎻ ovaries sublunateꎬ 1􀆰 2 -
2 mm longꎻ styles 0􀆰 2 - 0􀆰 3 mm longꎬ at apex
with depressed ̄capitate stigmas. Achenes pur ̄
ple ̄redꎬ strongly bilaterally compressedꎬ broadly
lunateꎬ ca. 3 × 1􀆰 1 mmꎬ glabrousꎬ on each side
longitudinally and thinly 3 ̄ribbed.
中国安徽省(Anhui Province): 岳西县(Yuexi
County)ꎬ alt. 1670 mꎬ 石缝( in fissures of rocks)ꎬ
花紫红色( fls. purple ̄red)ꎬ 1997 ̄08 ̄13ꎬ 谢中稳ꎬ
郑鹿邻(Z􀆰W. Xie & L􀆰L. Zheng) 97021(holotypeꎬ
PE)ꎮ
本种在亲缘关系方面接近尖叶唐松草 Thalic ̄
trum acutifolium (Hand􀆰 ̄Mazz.) Boivinꎬ 与后者
的区别在于: 本种的茎较低矮ꎬ 高约 20 cmꎬ 基生
叶为三回三出复叶ꎬ 小叶较小ꎬ 多为倒卵形ꎬ 长
0􀆰 6 ~ 1􀆰 3 cmꎬ 宽 4 ~ 9 mmꎬ 雄蕊花丝狭倒披针
形ꎬ 与花药等宽ꎬ 雌蕊群由 (2~) 3 ~ 5 枚心皮组
成ꎬ 瘦果宽新月形ꎻ 尖叶唐松草的茎高 25 ~ 65 cmꎬ
基生叶为二回三出复叶ꎬ 小叶较大ꎬ 多呈卵形ꎬ 长
2􀆰 3 ~ 5 cmꎬ 宽 1 ~ 3 cmꎬ 雄蕊花丝倒披针形ꎬ
比花药宽ꎬ 雌蕊群由 6 ~ 12 枚心皮组成ꎬ 瘦果多
呈狭长圆形[1]ꎮ
致谢: 深切感谢孙英宝先生为本文绘图ꎮ
参考文献:
[ 1 ]   王文采ꎬ 王蜀秀. Thalictrum[M] / /中国植物志: 第
27卷ꎬ 第 2 分册. 北京: 科学出版社ꎬ 1979: 502-
592.
(责任编辑: 刘艳玲)
965  第 6期                            王文采: 岳西唐松草ꎬ安徽毛茛科一新种