frond GRE

1.fronds of bracken.

欧洲叶。

2.an unexpanded fern frond

未展开叶

3.the green fronds feathered against a blue sky.

绿叶在蓝天下摇曳。

4.The polymorphy of fronds and chromosome number of Ophioglossum petiolatum Hook.

有梗瓶尔小草叶多形性和色体数目.

5.fern fronds uncurling in the spring air.

羊齿叶在春风中伸展开来

6.The apical cell and basal cell act as the ancestor cells of frond and rhizoid.

两个细胞分别成为叶片和假根祖细胞。

7.Characteristics: Terrestrial ferns; stipes tuft, backlish at base; young fronds pinnaye with wider pinnae, when getting older, the fronds become bipinnate or tripinnatifid with slender pinnules.

形态：地生，叶柄丛生，基部黑色；年轻叶子一回羽状复叶，叶子二回或三回羽状复叶。

8.A fern (Matteuccia struthiopteris) of northern temperate regions, having long plumelike fronds that form a crown.

荚果：一种在气候温和北部地区生长（荚果荚果属），有形成花冠状似羽长叶

9.tree ferns of temperate Australasia having bipinnatifid or tripinnatifid fronds and usually marginal sori; in some classification systems placed in family Cyatheaceae.

分布于温带澳大拉西亚树，叶二回羽状分裂或三回羽状分裂，囊群位于叶边缘；在一些分中归入桫椤科。