Abstract : Orchidaceae is one of the largest families of monocot plants.

摘要 ： 兰为单子中最大的一个。

The geographic distribution and floristic characteristic of Magnoliaceous 7 genera and 23 species in Jiangxi are studied in this paper.

摘要对江西木兰7属23种的地理分布和区系特征分析。

The observation on the microstructure of six orchids demonstrated that they have the typical orchidaceous roots with velamen and thick cortical tissue.

本文对密花石斛等六种兰根的显微结构比较观察。