prothallus

基本解释

Archegonial neck usually inclines or curves towards the base of the prothallus at maturity.
颈卵器成熟后，颈部常向原叶体基部倾斜或弯曲。
In homosporous plants, there is only one type of prothallus with both male and female sex organs.
在具同形孢子的植物中，只有一种雌雄性器官兼备的原叶体类型。
In vascular plants the diploid sporophyte is the dominant phase and in the ferns, for example, the gametophyte is a small prothallus.
在维管植物（蕨类）中二倍体的孢子体占生活史的主要部分，配子体仅为原叶体。
They indicated that adult prothallus with hairs, bifurcate rhizina and curve archegonium are some the evolution characteristic.The paper preliminary discusses its taxonomic significance.
研究表明龙头节肢蕨的配子体发育过程中出现毛状体，假根分叉，颈卵器弯曲等进化特征，并对其分类学意义初步讨论。
Prothallus (pl. prothalli) A flattened disk of cells that forms the free-living haploid gametophyte generation of certain ferns, e.g.Dryopteris.
原叶体：一种扁平的叶状体，它是某些蕨类植物的能独立生活的单倍性配子体，如鳞毛蕨属。