ferns

n.

羊齿植物，蕨类植物( fern的名词复数 )；

Ferns diversified in the shadow of angiosperms.
A Classification for Extant Ferns
Ferns and allied plants : with special reference to tropical America
Fast keypoint recognition using random ferns
dictionary of the flowering plants and ferns
A dictionary of the flowering plants and ferns.
Image Classification using Random Forests and Ferns
Horsetails and ferns are a monophyletic group and the closest living relatives to seed plants.
Starch Gel Electrophoresis of Ferns: A Compilation of Grinding Buffers, Gel and Electrode Buffers, and Staining Schedules
Botanists' Reference. (Book Reviews: A Dictionary of the Flowering Plants and Ferns)