中国五加科植物的分类学研究:罗伞属和鹅掌柴属的新种和新异名(英文)

Contributions to the study of Chinese Araliaceae:New species and synonyms in Brassaiopsis and Schefflera

在编写《FloraofChina》五加科Araliaceae时,发现两个新种,即拟榕叶罗伞BrassaiopsispseudoficifoliaLowry&C.B.Shang和光华鹅掌柴SchefflerazhuanaLowry&C.B.Shang。前者与榕叶罗伞B.ficifoliaDunn很相似,其区别在于,叶裂片数目较多,花序上具较多的伞形花序,花序轴具刺,主要分布于云南,广西偶见。后者与白花鹅掌柴S.leucanthaR.Vig.相似,其区别在于,子房心皮数目较多,果时具明显的萼缘,花盘扁平,叶质地较薄,局限分布于西藏墨脱县。同时发现越南产的BrassaiopsisgausseniiBui和中国产的细序鹅掌柴ScheffleratenuisH.L.Li、球序鹅掌柴S.glomerulataH.L.Li均不能成立,处理为异名。

Two new species of Araliaceae from China are described based on material examined while preparing a treatment of the family for the Flora of China. Brassaiopsis pseudoficifolia Lowry ＆ C. B. Shang, primarily found in Yunnan with a single collection known from adjacent Guangxi, most closely resembles B. ficifolia Dunn, but differs in having more numerously lobed leaves, more umbels per inflorescence, and prickles on the inflorescence axes and the stems. Schefflera zhuana Lowry ＆ C. B. Shang, restricted to Melog County in southeastern Xizang, resembles S. leucantha R. Vig., but is distinguished by its ovaries with more carpels, an evident calyx forming a rim, a flat to depressed nectar disc, and thin leaf texture. Three previously recognized species （Brassaiopsis gaussenii Bui, Schefflera tenuis H. L. Li, and S. glomerulata H. L. Li） are formally placed in synonymy under currently recognized taxa.