isoetes
noun
iso·etes
| \ īˈsōəˌtēz\
Definition of isoetes
1
capitalized
: a large widely distributed genus (coextensive with the family Isoetaceae) of fern allies comprising the aquatic or marsh-growing quillworts that have a short buried lobed stem from which arises a tuft of quilt-shaped leaves bearing sporangia in their axils — see isoetales
Keep scrolling for more