兰科的

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科植物根的显微结构进行了比。

The dominant plants are sages (Lamiaceae) and evergreen oaks and, in drier areas, chamise (Adenostoma fasciculatum), manzanita (Arctostaphylos pungens), and species of Ceanothus.

优势树种有薄荷属的一些树，常绿的橡树，在旱的地区通常有蔷薇属的，石兰科的常绿及某些鼠李。