No.20  JIA LIU, WEI-ZHENG TAN, HUI-ZHE FENG & WEN-BO LIAO：

Loxostigma: a new record genus of Angiospermae to Guangdong Province, China

Guihaia  37(10): 1257-1260.

ABSTRACT

A large number of specimens were collected during the pilot work of the Fourth National Survey on Traditional Chinese Medicine Resources in Deqing County, Guangdong Province. One of them was identified as Loxostigma dongxingensis (Chun ex K. Y. Pan) Möller & Y. M. Shui, belongs to Loxostigma Clarke, which was never recorded before in Guangdong. Loxostigma species are perennial herbs or subshrub， having rhizomes or not. Corolla bilabiate, tube broadly tubular, stamens 4, anthers coherent in pairs at apex, and two pairs of stamens are gradually connivent. Seeds with one hairlike appendage at each end. Loxostigma species are similar to Briggsia species. There are eleven spsecies in Loxostigma so far, distributed in Bhutan, China, India, Myanmar, Nepal, Sikkim, and North Vietnam. All eleven species distribute in China (Sichuan, Yunnan, Guizhou and Guangxi) . This is the first record in Guangdong. Guangdong is the most east boundary where Loxostigma naturally distributed. L. dongxingensis is perennial herbs, stems 20－60 cm, corolla yellow, swelling at the base, then become constricted above the base and below the middle, stamens 4, anthers coherent in pairs, distributed in Guangxi and North Vietnam, first recorded in Guangdong, grows in shaded dense forest near streams in Xiangyashan Forest Station of Deqing County.

Fig. 1  Loxostigma dongxingensis(Chun ex K. Y. Pan) Möller &Y. M. Shui A. Side view of corolla; B. Front view of corolla; C. Opened corolla and stamens; D. Plant.