Abstract:

During a plant diversity survey in Chentang valley located on the southern slopes of the Himalayan range, an unrecorded specimen from the genus Pedicularis, not documented in the Flora of China, was discovered. Based on a comprehensive literature review and detailed morphological comparison, the plant was identified as a new record of Pedicularis tamurensis T. Yamaz in China, with a new Chinese name, Chen Tang Ma Xian Hao, accordingly proposed. Prior to this finding, the species was only known to exist in Nepal, but has now been identified in Chentang Town, Dingjie County, Shigatse Prefecture, Tibet Autonomous Region of China. This newly documented species grows under (Abies fabri (Mast.) Craib) forests at altitudes of approximately 2 900 m. While similar to Pedicularis fletcheri P. C. Tsoong, the species can be distinguished based on the following characteristics: leaves opposite, lamina pinnatisect, densely hairy on both surfaces; inflorescence racemose; flowers white, galea sickle-shaped and curved, tapering to beak in middle, apex 2-lobed, and labium inferius completely enveloping galea. This paper describes the morphological traits and distribution of P. tamurensis in detail, with color images provided for easy identification. This new discovery advances our knowledge of domestic Pedicularis and plant diversity in China.

摘要：

于西藏喜马拉雅南坡的陈塘沟开展植物多样性调查过程中，发现一种在《中国植物志》中未记录的马先蒿属（Pedicularis）植物。通过文献查阅和详细的形态学比较，确定其为中国新记录种Pedicularis tamurensis T. Yamaz.，为其新拟中文名称：陈塘马先蒿。该种以前仅发现于尼泊尔，现也发现于中国西藏自治区日喀则市定结县陈塘镇。此新记录种生长于海拔约2 900 m的冷杉（Abies fabri （Mast.） Craib）林下，与光唇马先蒿（Pedicularis fletcheri P. C. Tsoong）相似，主要识别特征为：叶对生，两面均密生短毛，羽状全裂至深裂；花序总状，花白色，盔瓣呈镰刀状弯弓，中间渐狭成喙，顶端2裂，下唇完全包围盔瓣。本文对陈塘马先蒿进行了详细的形态描述，介绍了其分布信息，并提供彩色图片便于鉴别。该新记录种的发现更新了国产马先蒿属植物的资料，丰富了中国植物多样性的内容。