Question

what is microspophyll​

Answer 1

a sporophyll that develops only microsporangia.

Answer 2

A sporophyll is a leaf that bears sporangia. Both microphylls and megaphylls can be sporophylls. In heterosporous plants sporophylls (whether they are microphylls or megaphylls) bear either megasporangia and thus are called megasporophylls or microsporangia and are called microsporophylls. The overlap of the prefixes and roots makes these terms a particularly confusing subset of botanical nomenclature.