ferns

Ferns grow in shady and moist places.

羊齿类植物阴暗潮湿的地方。

Apospory is found in some mosses and ferns.

无孢子殖存于一些苔藓和蕨类植物中。

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.

地，叶柄丛，基部黑色；较年轻的叶子一回羽状复叶，较老的叶子二回或三回羽状复叶。

Homosporous ferns produce sporophytes by intra gametophytic selfing, inter gametophytic mating, or apogamy.Gametangium ontogeny, genetic load, and ploidy affect the mating system of each species.

摘要同型孢子蕨类的孢子体可经由同子体自交、异子体交两类育系统或以无殖的方式产，异子体交又可分为异子体自交和异子体异交两种方式。

Here in the rainforest, the giant ohia lehua trees and hapuu ferns provide protective canopy to an amazingly diverse collection of plants and animals.

就这片雨林中，高大的ohia lehua树和那叫hapuu的蕨类植物给丰富得令人惊奇的动植物撑起了一伞。

Indusium The flap of tissue, derived from the placenta, that encloses the developing sporangia in the sorus of a fern.

是一种起源于胎座（应为叶表皮译者注）的瓣片状组织，覆盖蕨类植物孢子囊群中正发育的孢子囊上。

Rhizoid A unicellular rootlike structure found in certain algae and in the gametophyte generation of the bryophytes and some ferns.

一些藻类、苔藓植物和裸子植物子体中存的由单个细胞形成的类似根的结构。

Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.

蕨类植物是最早登陆的维管植物，至今仍然是态系统初级产力的重要组成部分。

The ultrastructure of the blepharoplast and the multilayered structure (MLS) in the fern Osmunda cinnamomea var.

精子发育过程中的毛体和多层结构的超微结构进行了研究。

Apomixes is comparable to the conditions of apogamy and apospory, which are seen in many ferns.

许多蕨类植物中常见的无融合殖包括无子殖和无孢子殖。