角唇隔距兰,中国隔距兰属(兰科)一新记录种

Cleisostoma tricornutum Averyanov, A Newly Recorded Species of Cleisostoma(Orchidaceae) from China

摘要:

报道了中国兰科（Orchidaceae）隔距兰属（Cleisostoma Blume）一新记录种： 角唇隔距兰（C. tricornutum Averyanov）。该种与C. crochetii（Guillaumin） Garay、C. parishii（J. D. Hooker） Garay相近，因其有不分枝的线状花粉团柄、球状的花粉团块和一个先端短喙状的半球形药帽而与C. crochetii（Guillaumin） Garay相区别；因其有松散、罕分枝的花序，长角状的唇瓣侧裂片而与C. parishii（J. D. Hooker） Garay相区别。提供了新记录种的形态描述及图片。

Abstract:

Cleisostoma tricornutum Averyanov is reported from China for the first time. This species may be related to C. crochetii (Guillaumin) Garay, from which it differs in having a simple filiform pollinarium stipe, subglobular pollinia and a hemispheric operculum with a short obtuse beak. This species also is similar with C. parishii (J. D. Hooker) Garay, but differs in having lax, rarely branched inflorescence and long, horn-shaped, lip side lobes. Description and photos of the new record are also provided.