木兰科常用绿化树种幼苗形态

Seedlings morphology of 20 species in Magnoliaceae

搜集8属20种木兰科Magnoliaceae常用绿化植物,通过研究幼苗的形态特征,发现木兰科幼苗属间形态差异明显,有一定的分类价值;属内和种间形态差异细微,相似程度大,区分难度较大。描述了20种木兰科常用绿化植物幼苗,基于子叶柄的长度、子叶在胚乳中折叠方式和幼叶在芽中卷叠方式等特征,编制了分属检索表,并制作标本。

The seedlings morphologic characteristics of 20 species from eight genera in Magnoliaceae were observed. The results showed that the morphologic variations among genera were different significantly, but it was difficult to distinguish species in the same genus because of such small differences. Morphologic characters of the seedlings from 20 species of Magnoliaceae were described, and some specimens were made and index which based on the morphologic characteristics such as length of cotyledon petiole, cotyledons folder in endosperm and leaf blade＇s fold mode in shoot was compiled. [Ch, 1 fig. 1 tab. 15 ref. ]