摘要
描述了泰国雨久花属MonochoriaC .Presl一新变种 :窄叶鸭舌草M .vaginalisvar.angustifoliaG .X .Wang。该新变种与原变种鸭舌草M .vaginalisvar.vaginalis都具有类似的总状花序 ,但前者的叶片为窄披针形 ,3- 7× 0 .3- 2 .0cm ,叶片宽长比在 0 .1 - 0 .4之间 ,叶基部裂片最长不超过 2mm ,总状花序具花 3- 7朵 ,而原变种鸭舌草的叶片较宽 ,为卵心形或心形 ,4- 9× 2 - 8cm ,叶片宽长比在 0 .5 -0 .95之间 ,叶基部裂片最长可达到 2cm ,总状花序具花 6- 1 0朵。
A new variety of Monochoria C. Presl from Thailand, M. vaginalis (N. L. Burman) Kunth var. angustifolia G. X. Wang, is described. This variety can be distinguished from the typical one, M. vaginalis var. vaginalis, by having mature leaves narrowly lanceolate, 3-7 x 0.3-2.0 cm with the basal lobes up to 0.2 cm long, apex acute or acuminate, and 3-7-flowered raceme. In M. vaginalis var. vaginalis the mature leaves are elliptic to cordate, 4-9 x 2-8 cm, the basal lobes up to 2 cm long, and raceme 6-10-flowered.
出处
《植物分类学报》
CSCD
北大核心
2003年第6期569-572,共4页
Acta Phytotaxonomica Sinica
关键词
泰国
雨久花属
雨久花科
变种
窄叶鸭舌草
Monochoria
Pontederiaceae
M. vaginalis var. angustifolia
new variety
Thailand
