Wu Xu, Ma Dai-Kun, An Ming-Tai, Feng Yu-Cai, Yu Jiang-Hong, Han Ji-Huai
College of Forestry, Guizhou University, Guiyang 550025, Guizhou, China.
Key Laboratory of Systematic and Evolutionary Botany/State Key Laboratory of Plant Diversity and Specialty Crops, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
PhytoKeys. 2025 Aug 15;261:175-187. doi: 10.3897/phytokeys.261.152449. eCollection 2025.
Through detailed morphological comparison and robust molecular evidence, we confirm M.T.An & Xu Wu as a new species of Rosaceae from Guizhou province, southwest China. Morphologically, closely resembles but differs in several key traits: it is a creeping liana rather than a low subshrub; its stems are 0.6-1.5 cm long compared to the slender stems less than 0.5 cm tall in ; its leaves are larger, measuring 5-9 × 3-6 cm vs. 2.5-3.5 × 2-3 cm; stipules are sessile, clasping, and larger (0.8-1.3 × 0.6-1.1 cm) rather than peitiolate and smaller (0.4-0.6 × 0.3-0.5 cm) without clasping; calyx tubes are densely pilose on both surfaces and bear stipitate glands abaxially, in contrast to the slightly pubescent, glandless calyx tubes of ; and the seed number ranges from 2 to 4 instead of consistently 2. These morphological distinctions are further corroborated by molecular phylogenetic analysis based on 703 single-copy nuclear genes, supporting the recognition of as a distinct species within the genus.
通过详细的形态学比较和有力的分子证据，我们确认了产自中国西南部贵州省的毛茛叶绣线菊（M.T.An & Xu Wu）为蔷薇科的一个新物种。在形态上，它与[某物种]相似，但在几个关键特征上有所不同：它是一种攀援藤本植物，而非低矮的亚灌木；其茎长0.6 - 1.5厘米，而[某物种]的茎纤细，高度不到0.5厘米；它的叶子更大，尺寸为5 - 9×3 - 6厘米，而[某物种]的叶子为2.5 - 3.5×2 - 3厘米；托叶无柄，抱茎，且更大（0.8 - 1.3×0.6 - 1.1厘米），而非具柄且较小（0.4 - 0.6×0.3 - 0.5厘米）且不抱茎；花萼筒两面密被柔毛，背面有具柄腺体，相比之下，[某物种]的花萼筒稍被柔毛且无腺体；种子数量为2至4粒，而不是始终为2粒。基于703个单拷贝核基因的分子系统发育分析进一步证实了这些形态学差异，支持将其认定为该属内的一个独特物种。
