Isoetes riparia Engelm. ex A. Braun

Locations ofIsoetes riparia Engelm. ex A. Braun in Virginia

Show image with county labels


Botanical Name
Isoetes riparia Engelm. ex A. Braun
Common Name
Shore Quillwort
Flora of Virginia Name/Status
Isoetes riparia Engelm. ex A. Braun
Plants from coastal Virginia, especially intertidal habitats, have long been called I. riparia, sometimes with "saccharata type" being added. Some regard these plants as a distinct species, I. saccharata Engelmann. Considerable variation is thought to be caused by multiple polyploid origins within the I. riparia complex. Until this is better understood, we have retained the name I. riparia. The map is largely taken from Musselman, et al. (Amer. Fern J. 84:51 (1994)). See also I. mattaponica.
Tidal shores in fresh or oligohaline waters, stream margins, and ponds; commonly submerged but sometimes becoming emergent or terrestrial by fluctuating water levels. Infrequent in the inner Coastal Plain;
rare in the mountains (one location).
Native Status

To save this map, right-click (control-click for Mac users) on the map and choose "Save Image As...".