Water-shield, purple wen-dock, brasénie de Schreber

Leaf blade 3.5-13.5 × 2-8 cm. Flowers ca. 2 cm diam.; perianth parts dull purple, 10-20 × 2-7 mm; petals slightly longer and narrower than sepals. Fruits 6-10 mm. Seeds 1-2, 2.5-4 × 2-3 mm. 2 n = 80.

Flowering late spring-summer. Oligotrophic or mesotrophic ponds, lakes, and sluggish streams; 0-2000 m; Alta., B.C., Man., N.B., Nfld., N.S., Ont., Que.; Ala., Alaska, Ark., Calif., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.C., Tenn., Tex., Vt., Va., Wash., W.Va., Wis.; Mexico; West Indies (Cuba, Jamaica, Hispaniola); Central America (Guatemala and Belize); South America (se Venezuela); e Asia; Africa; e Australia.

SELECTED REFERENCES

Osborn, J. M. and E. L. Schneider. 1988. Morphological studies of the Nymphaeaceae sensu lato. XVI. The floral biology of Brasenia schreberi. Ann. Missouri Bot. Gard. 75: 778-794.