isosporous การใช้

They are flowerless, vascular, terrestrial or isosporous, homosporous ) and are borne on the upper surface of the leaf blade of specialized leaves ( sporophylls ) arranged in a cone-like strobilus at the end of upright stems.
Early land plants had sporophytes that produced identical spores ( isosporous or homosporous ) but the ancestors of the gymnosperms evolved complex heterosporous life cycles in which the spores producing male and female gametophytes were of different sizes, the female megaspores tending to be larger, and fewer in number, than the male microspores.