Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Alismatales
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Learn more about Limnobium from the Vascular Plants of North Carolina.
In the 14 years prior to 1982, H. morsus-ranae increased its area of occurrence in North America by 3 times. Although it differs from most other North American aquatics in having very rounded leaves with five prominent and converging primary veins, these characters do not distinguish it from floating-leaved forms of Limnobium spongia. Read more in Status and identification of Hydrocharis morsus-ranae & Limnobium spongia (Hydrocharitaceae)... (Catling & Dore, 1982)
SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
SYNONYMOUS WITH Flora of North America
SYNONYMOUS WITH VASCULAR FLORA OF THE CAROLINAS (Radford, Ahles, & Bell, 1968) 028-04-001:
Limnobium spongia FAMILY Hydrocharitaceae
SYNONYMOUS WITH Manual of the Southeastern Flora (Small, 1933, 1938)
American Frogsbit, Spongeplant
To see larger pictures, click or hover over the thumbnails.
JK Marlow jkm160914_101
SE-EPPC Aquatic Plant ID Workshop
Leaves long-stalked with floating or emergent blades, per Wildflowers of Tennessee (Carman, 2005).
COMPARE aquatic plants
Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Flora of North America
Manual of the Southeastern Flora (Small, 1933, 1938)
Emergent aquatic that also has floating leaves (rooted); Forb
Native to the Carolinas & Georgia
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
Leaves have petioles.
TO LEARN MORE about this plant, look it up in a good book!
- Field Guide to Aquatic Plants of Alabama (Lovell, 2007) p19
- Guide to the Wildflowers of SC (Porcher & Rayner, 2001) p337
- Wildflowers of the Carolina Lowcountry (Porcher, 1995) p113
- Wildflowers of Tennessee (Carman, 2005) p337
If a search such as "Carex leptalea var. leptalea" doesn't deliver the results you want, try "Carex leptalea".
Or, to minimize chances of a misspelling, try just "Carex le".
Less is more: If "pencil flower" doesn't deliver the results you want, try "pencil".
Or try alternate spellings: If "wooly" doesn't work, try "woolly" or just "wool".