毛茛科六新种

Six new species of Ranunculaceae from China

关键词:  毛茛科, 乌头属, 翠雀花属, 铁线莲属, 毛茛属, 新种, 中国

Key words:  Ranunculaceae, Aconitum, Delphinium, Clematis, Ranunculus, new species, China

摘要:

该文描述了毛茛科六新种:(1)托里乌头,与阿尔泰乌头近缘,区别为其茎和叶无毛,总状花序极密集,雄蕊花丝多有1或2小齿。(2)门源翠雀花,与大通翠雀花近缘,区别为其茎极短,花序总状,退化雄蕊瓣片不分裂。(3)云台山铁线莲,与裂叶铁线莲近缘,区别为其叶为二回羽状复叶,花较小,雄蕊花丝呈黑色,无脉。(4)黑丝铁线莲,与前种云台山铁线莲在亲缘关系上极为相近,区别为其小叶较小,多呈狭卵形或披针形,聚伞花序也较小,通常只具3花。(5)五台山毛茛,与砾地毛茛相似,区别为其基生叶被柔毛,花瓣蜜槽具鳞片,心皮具短而粗的花柱和小柱头。(6)靖西铁线莲,与宝岛铁线莲在亲缘关系上接近,区别为其茎疏被短柔毛,小叶卵形或狭卵形,不分裂,聚伞花序有1～3花,萼片较大(长1.7～2 cm,宽0.5～0.7 cm)。

Abstract:

Six species belonging to four genera, Aconitum, Delphinium, Clematis and Ranunculus respectively(Ranunculaceae)are described as new from China:(1)Aconitum tuoliense, described from Xingjiang Uygur Autonomous Region and related to A. smirnovii Steinb., differs in its glabrous stem and leaves, very dense raceme, and mostly 1-2-denticulate filaments of stamens.(2)Delphinium menyuanense, described from Qinghai Province and related to D. pylzowii Maxim., differs in its very short stem, racemose inflorescence, and undivided limbs of staminodia.(3)Clematis yuntaishanica, described from Henan Province, and related to C. parviloba Garden. & Champ., differs in its bipinnate leaves, smaller flowers, and black, nerveless filaments of stamens.(4)Clematis melanonema, described also from Henan Province and closely related to the above new species, C. yuntaishanica, differs in its smaller, narrowly ovate or lanceolate leaflets, and smaller, usually 3-flowered cymes.(5)Ranunculus wutaishanicus, described from Shanxi Province and similar to R. glareosus Hand.-Mazz., differs in its pubescent basal leaves, nectary pit of petal with a scale, and carpel with a short and thick style and a minute stigma.(6)Clemartis jingxiensis, is described as new from Guangxi Zhuang Autonomous Region. It is related to C. formosana, and from the latter differs in its sparsely puberulous stems, ovate or narrowly ovate and undivided leaflets, 1-3-flowered cymes, and in its larger sepals 1.7-2 cm long and 0.5-0.7 cm broad.