frond GRE

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

有梗瓶尔小草多形性和染色体数目.

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

两个细胞分别成为片和根祖细胞。

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.

生，柄丛生，基部黑色；较年轻子一回羽状，较老子二回或三回羽状。

Under the upswelling tide he saw the writhing weeds lift languidly and sway reluctant arms, hising up their petticoats, in whispering water swaying and upturning coy silver fronds.

在惊涛骇浪海潮底下，他看到扭滚着海藻正懒洋洋伸直开来，摇摆着胳膊，裙裾撩得高又高，在窃窃私语水里摇曳并翻转着羞怯银。