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

本对密花石斛等六种兰科植物根的显微结构进行比较观。

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

摘要对江西木兰科植物7属23种的地理布和区系特征进行。

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

摘要 ： 兰科植物为单子叶植物中最大的一个科。