Origin: Native
Conservation Status: Review Group 1 in Washington (WANHP)
[none provided]
PNW Herbaria: Specimen records of Isoetes howellii in the Consortium of Pacific Northwest Herbaria database.
WA Flora Checklist: Isoetes howellii checklist entry.
E-Flora BC: Isoetes howellii atlas page.
CalPhotos: Isoetes howellii photos.
USDA Plants: Isoetes howellii information.