5. Blyxa Noroña ex Thouars, Genera Nova Madagascariensia. 4. 1806.
[Greek blyxo, to gush forth, spout out, bubble up]
Plants annual [perennial], of fresh waters. Rhizomes absent [present]; stolons present. Erect stems rooted in substrate, unbranched short. Leaves basal, submersed, sessile; blade of uniform color from margin to margin, with continuous intercellular spaces, linear, base grading into sheath, apex acute; midvein without rows of lacunae along sides, uniform in color throughout from margin to margin, with continuous intercellular spaces; abaxial surfacely without prickles or aerenchyma; intravaginal squamules entire. Inflorescences 1-flowered, flowers rarely paired [cymose], long-pedunculate; spathe not winged. Flowers bisexual [unisexual, staminate and pistillate on different plants], emersed, pedicellate; petals white to reddish; filaments distinct; anthers fusiform; pollen in monads; ovary 1-locular; styles 1, not 2-fid. Fruits cylindric, ridged, dehiscing irregularly. Seeds ellipsoid or fusiform, echinate [without spines and with or without ridges or wings].
Species 9 (1 in flora): introduced, North America; Asia, Africa, Australia.
Cook, C. D. K., and R. Lüönd. 1983. A revision of the genus Blyxa (Hydrocharitaceae). Aquatic Bot. 15: 1--52. Thieret, J. W., R. R. Haynes, and D. H. Dike. 1969. Blyxa aubertii (Hydrocharitaceae) in Louisiana: New to North America. Sida 3: 343--344.