贵州泽泻科植物分布新记录—利川慈姑

Sagittaria lichuanensis — A Newly Recorded Species in Alismataceae from Guizhou Province

摘要:

以前报道中国特有种—利川慈姑(Sagittaria lichuanensis)仅仅分布在我国的福建、广东、江西三省交界的武夷山山脉以及湖北利川县, 该种在贵州的分布为新记录。对该种的形态特征和群落特点作了介绍, 同时还比较了该分布点与其它分布点之间生境条件的差异及分布格局。该种在贵州的分布使其地理分布状况从仅仅分布在我国的第三级阶梯变为分布于我国的第二、第三级阶梯。这一发现为研究慈姑属的地理分布规律以及系统演化历史提供了新的场所和证据。此外, 该种独特的生殖特点为比较不同生境条件下物种的生殖策略差异提供了有利条件。

Abstract:

The distribution of the Chinese endemic species Sagittaria lichuanensis (Alismataceae) has been reported in Guangdong, Fujian, Jiangxi, and Hubei Provinces. In a recent field investigation, a new population was found in Pingba County of Guizhou Province. The morphological and population characters of the new population were described, and the habitat and the distribution patterns of this population were compared with the other populations recorded previously. The new distribution of S. lichuanensis in Guizhou provided a good example for studying its geographic distribution pattern and the evolutionary history, and the special reproductive strategies at different distribution environments.