what phylum are quillworts in
Isoetes, commonly known as the quillworts, is a genus of plants in the class Isoetopsida and order Isoetales.They are lycopods. There are about 140â150 species, with a cosmopolitan distribution but often scarce to rare.ompared to other genera, the genus Isoetes is a technically difficult and relatively poorly known. Even after various studies with cytology, scanning electron microscopy, and chromatography, the individual species are still difficult to identify and their phylogeny is still disputed.