Pankaj
Last Activity: 10 Years ago
The gymnosperms are heterosporous; they produce haploid microspores and megaspores.
The two kinds of spores are produced within sporangia that are borne on sporophylls which are arranged spirally along an axis to form lax or compact strobili or cones.
The strobili bearing microsporophylls and microsporangia are called microsporangiate or male strobili.