西藏东南部发现桐庐铁线莲

Discovery of Clematis tongluensis (Ranunculaceae)from Southeast Tibet of China

毛茛科的桐庐铁线莲(Clematis tongluensis)原知分布于尼泊尔、不丹、印度东北部和孟加拉,2019年夏天在中国西藏东南部被发现。桐庐铁线链与绣球腾(Clematis montana)在亲缘关系上接近,两者的区别在于桐庐铁线莲的萼片呈长圆形,顶端尾状渐尖和表面被毛,背面无毛。

Clematis tongluensis,a species distributed in Nepal,Bhutan,Northeast Indida and Bangladesh,was discovered this summer from Southeast Tibet Autonomous Region of China.This species is related to Clemateis montana Buch.-Ham.ex DC.,differing from the latter in its oblong sepals caudate-acuminate at apex and hairy adaxially,glabrous abaxially.In C.montana,the sepals are obovate,at apex rounded,and glabrous adaxially,puberulous abaxially.