Also found in: Thesaurus.
Switch to new thesaurus
|Noun||1.||genus Isoetes - type and genus of the Isoetaceae and sole extant genus of the order Isoetales|
fern genus - genera of ferns and fern allies
quillwort - any of several spore-bearing aquatic or marsh plants having short rhizomes and leaves resembling quills; worldwide except Polynesia