广东报春苣苔属一新种——黄进报春苣苔

Primulina huangjiniana(Gesneriaceae),a new species from Guangdong,China

该文报道了在广东丹霞山发现的报春苣苔属一新种——黄进报春苣苔(Primulina huangjiniana),并对其进行了描述。该新种与同属物种短序报春苣苔(P. depressa)最为相似,但两者在形态特征上能够很好地区别:黄进报春苣苔具有更短的、长2.5~6 mm的苞片(vs.短序报春苣苔具有长15~30 mm的苞片,顺序下同);花萼裂片等长(vs.不等长),花丝基部附近膝状突起,中部以上具腺毛(vs.于中部膝状突起且无毛);柱头倒三角形,深2裂成2线形裂片(vs.片状,稍2浅裂,裂片为三角形),侧膜胎座(vs.中轴胎座)。加上该新种在内,丹霞山目前共记录有6种报春苣苔属植物,其中丹霞小花苣苔(P. danxiaensis)和该新种均为丹霞地貌特有植物。黄进报春苣苔目前在丹霞山的两个地方有发现,成年植株不超过200株,根据IUCN红色名录标准,属于极危种。

Primulina huangjiniana,a new species of Gesneriaceae from Mount Danxia of Guangdong Province in China,is described and illustrated here. The new species is easily distinguished from the most morphologically similar species P. depressa by its shorter bracts 2.5-6 mm long( vs. 15-30 mm long),subequal( vs. unequal) calyx lobes,filaments with glandular puberulence above the middle,and geniculate near the base( vs. glabrous and geniculate near the middle),stigma obdeltoid,deeply 2-lobed with two linear lobes( vs. lamelliform,slightly 2-lobed with two acute-triangular lobes),and parietal placenta( vs. axile placenta). Including this new species,there are six Primulina species recorded in Mount Danxia. Among them,P. danxiaensis and P. huangjiniana are endemic to Danxia landform. Only two populations of P. huangjiniana were found with no more than 200 mature individuals in Mount Danxia. This new species could be considered as Critically Endangered( CR) according to IUCN Red List Criteria.