What type of spores are produced by the plant shown in the given figure?

In which one of the following species of $Selaginella$,the apex continues its vegetative growth beyond the formation of $strobilus$?

The prothallus of fern is

Prothallus of the fern produces

In which plant group is the gametophytic phase reduced, haploid, short-lived, and subterranean?

Ligulate leaves are found in