中国纤细蛇根草(茜草科)的订正

Critical Notes on Ophiorrhiza gracilis Kurz (Rubiaceae) from China

摘要:

通过标本考证和野外研究，证实中国文献记载的纤细蛇根草（Ophiorrhiza gracilis Kurz）实为尾瓣蛇根草（O. caudipetala Deb & Monda）错误鉴定，而后者之前仅被报道分布于印度，因此为中国新记录。尾瓣蛇根草具有明显不等大的对生叶片， 花冠裂片背部具长0.6~1 mm的角状突起，易与中国蛇根草属其它种类区分。

Abstract:

Ophiorrhiza gracilis Kurz was reported from China by several authors previously. Relevant specimen examination and field investigations revealed that it is actually a misidentification of O. caudipetala, which is known to be only distributed in India. Thus, its new record for the flora of China is reported here. Ophiorrhiza caudipetala can be distinguished from other species of the genus in China by its leaves usually in distinctly unequal pairs and corolla lobes with 0.6-1 mm long dorsal horns.