larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
a large, haploid (N=1) spore of a heterosporous plant that produes a megagmetophtye (female gametophyte)
In heterosporous plants, a haploid spore produced within a megasporangium of the sporophyte. Upon germination, megaspores produce unisexual female gametophytes ( megagametophytes).
The larger of two types of spores produced by many ferns and seed plants. The megaspore gives rise to a female gametophyte in ferns and in seed plants, and in flowering plants becomes the embryo sac.
Gk. megas, great, large + spora, a sowing] In plants, a haploid spore that develops into a female gametophyte.
A general term for large spores of heterosporous vascular plants.
the larger of the two kinds of spores produced in the sexual life cycle of a heterosporous plant, giving rise to the female gametophyte.
spore in heterosporous plants that gives rise to female gametophytes and is generally larger than a microspore.
A spore that gives rise to a female gametophyte.
In plants which are heterosporous, the larger kind of spore is called a megaspore; it usually germinates into a female (egg-producing) gametophyte. Contrast with microspore.
