TORCH
The Texas Oklahoma Regional Consortium of Herbaria
Log In
New Account
Sitemap
Home
Search
Search Collections
Map Search
Images
Image Browser
Search Images
Checklists & Floras
Oklahoma
Texas
Interactive Tools
Dynamic Checklist
Dynamic Key
Crowdsourcing
Ruppiaceae
Kurt Stuber
FNA
Resources
Robert R. Haynes in Flora of North America (vol. 22)
Herbs, annual or rarely perennial, not rhizomatous, caulescent; turions absent [present]. Leaves alternate to subopposite, submersed, sessile; sheath not persisting longer than blade, not leaving circular scar when shed, not ligulate, not auriculate; blade linear; intravaginal squamules scales, 2. Inflorescences terminal, capitate spikes, with subtending spathe, pedunculate; peduncle following fertilization often elongating, often spiraling. Flowers bisexual; subtending bracts absent; perianth absent; stamens 2, in 1 series; anthers distinct, dehiscing longitudinally; pollen arcuate; pistils 4--16, distinct, stipitate; ovules parietal, campylotropous. Fruits drupaceous. Seeds 1; embryo straight.
Ruppiaceae are found submersed in brackish or saline waters or fresh waters with very high calcium or sulfur ion concentrations.
Species within checklist:
Utah's Obligate Aquatic Plants
Ruppia maritima
Powered by
Symbiota