214 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[Vol. 9, No. 2 



11a. Sagittaria lancifolla subsp. lancifolia 



Sagittaria pugioniformis L. Pi. Surin. 15. 1775. 

 Sagittaria acuti folia L. f. Suppl. Sp. PI. 419. 1781. 

 Sagittaria ovata Redoute, Liliaceae 7: 411. 1813. 

 Sagittaria angusti folia Lindl. Bot. Reg. 14: pi. 1141. 1828. 

 Sagittaria sellowiana Kunth, Enum. PI. \. 159. 1841. 



Sagittaria lancifolia var. angusti folia (Lindl.) Griseb. Cat. PI. Cuba 218, p.p. 1866. 

 Sagittaria lancifolia var. major Micheli in DC. Monogr. Phan. 3: 73. 1881. 



Plant somewhat larger throughout. Leaves with linear to ovate blades. Bracts 

 (0.6-)l-3.5 cm long, striate. Sepals striate or ribbed. Stamens with filaments 

 2-5 mm long, the anthers 1-2.7 mm long. (FIG. 15a-c.) 



Type collection: Linnaeus based his name on Plumier's and Browne's de- 

 scriptions of West Indian plants. No type exists although several specimens an- 

 notated by Linnaeus are in the Linnaean herbarium. 



Distribution: Tropical and semi-tropical New World, from the estuary of the 

 Amazon River northerly along the coast to Colombia, throughout the West Indies 

 into peninsular Florida and the southern coastal islands of Georgia. The common 

 Sagittaria of Florida and the West Indies, more or less sporadic in South America, 

 in shallow waters of swamps and lakes mostly along the coast. Collections ex- 

 amined from Brazil, British Guiana, Colombia, and Dutch Guiana in South America; 

 Bahama Islands, Cuba, Dominican Republic, Haiti, Jamaica, and Puerto Rico in 

 the West Indies; Florida and Georgia in the United States. (FIG. 15.) 



lib. Sagittaria lancifolia subsp. media (Micheli) Bogin, comb. nov. 

 Sagittaria falcata Pursh, Fl. Am. Sept. 2: 397. 1814. 



Sagittaria plantaginifolia Martens & GaL Bull. Acad. Brux. 9(2): 379. 1842. 

 Sagittaria lancifolia var. media Micheli in DC. Monogr. Phan. 3: 73. 1881. 

 Sagittaria lancifolia var. falcata (Pursh) J.G.Sm. Mem. Torrey Club 5: 25. 1894. 



Plant somewhat smaller throughout. Leaves with lanceolate to ovate blades. 

 Bracts 0.5-1.5 cm long, papillose. Sepals more or less papillose. Stamens with 

 filaments 1.5-3.5 mm long, the anthers 1-2.2 mm long. (FIG. 15d.) 



Type collection: Drummond 376, New Orleans, Louisiana (lectotype, not seen, 

 Paris; isolectotypes GH, MO). The only available collection of var. media cited 

 by Micheli and characteristic of the subspecies is the lectotype here selected. 

 Unfortunately the specimens of Drummond 376 in the Gray Herbarium were not 

 seen by Micheli, while the Missouri one is fragmentary, so the lectotype selected 

 is the specimen at Paris, of which a fragment has been seen. 



Distribution: North American mainland from Panama to Mexico, north along the 

 Gulf and Atlantic coastal plains to Delaware. In fresh water swamps, ponds and 

 streams, occasionally in the fresh to brackish waters of tidal marshes, especially 

 in the north. Collections examined from British Honduras, Canal Zone, Costa 

 Rica, Guatemala, Nicaraugua, and Panama in Central America; Campeche, Oaxaca, 

 Tabasco, Tamaulipas, and Vera Cruz in Mexico; Alabama, Delaware, Florida, 

 Georgia, Louisiana, Maryland, Mississippi, North Carolina, South Carolina, Texas, 

 and Virginia in the United States. (FIG. 15.) 



Sagittaria lancifolia is the common species of the semitropical and warm- 

 temperate Atlantic coastal areas of North America. Its closest relationship is 

 with S. graminea, sharing with that species the pubescent filaments and non- 

 sagittate leaves. Typically with falcate achenes, thickish, ribbed, or papillose 

 bracts, and large stamens with linear, pubescent filaments, it is quite distinct 

 and easily recognized. It probably hybridizes with S. graminea, and the inter- 

 mediate forms that result have usually been included by American botanists in 



