210 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



{Vol. 9, No. 2 



cuneate-obovate, '2-2.5 x 1.1-1.5 mm, the faces unadorned or with 1-3 narrow 

 wings, the beak 0.1-0.3 mm long. (FIG. llg-i.) 



Type collection: Fernald, Griscom and Long 4297, swamp north of Land of 

 Promise, Princess Anne Co., Virginia (holotype GH; isotype GH). 



Distribution: Atlantic coastal plain of the southeastern United States from 

 Virginia to South Carolina and possibly Florida. A plant of the swampy lowlands 

 with a unique vegetative period; Fernald states that it produces leaves in the fall 

 of the previous year and has finished flowering by June. Collections examined 

 from Virginia, North Carolina, South Carolina, Florida. (FIG. 11.) 



lOe. Sagittaria graminea var. cristata (Engelm.) Bogin, comb. nov. 

 Sagittaria cristata Engelm. in Arthur, Contr. Flor. Iowa 5: 3. 1882. 



Annual, or perennating by runners and corms. Emersed leaves with linear or 

 lanceolate blades 4-8 x 0.5-1.5 cm, the thickish phyllodia to 10 cm long, petioles 

 15-50 cm long. Scapes 20-60 cm long, with 3-6 whorls of flowers. Bracts moder- 

 ately connate, 0.4-1 cm long, the free ends triangular. Pedicels 1.5-3.0 cm long. 

 Stamens numerous, the filaments 1.2=1.7 mm long. Mature receptacle 1.2-1.8 cm 

 in diameter; achenes obovate, 2.5-3 x 1.4-1.8 mm, the broad dorsal wing crenate, 

 the faces 1-winged, the subulate beak 0.4-0.7 mm long. (FIG. llj-1.) 



Type collection: 1881, Cratty s.n., Armstrong, Emmett Co., Iowa (lectotype 

 MO; isolectotype MO, NY). The numerous sheets of this collection in the Engel- 

 mann herbarium were not annotated by Engelmann. A representative sheet was 

 therefore selected as the lectotype. 



Distribution: Canadian shores of Lake Huron, southwesterly to northern Iowa. 

 Common in lakes and swamps especially in Minnesota and Wisconsin; there to a 

 great extent, replacing var. graminea. Collections examined from Ontario in Canada 

 and from Iowa, Michigan, Minnesota, and Wisconsin in the United States. (FIG. 11.) 



lOf. Sagittaria graminea var. chapmani J.G.Sm. Missouri .Bot. Gard. Rep. 6: 26. 

 1897. 



Sagittaria chapmani Mohr, Bull. Torrey Club 24: 20. 1897. 



Perennial with horizontal rhizome. Emersed leaves linear to lanceolate, 

 15-25 x 1.5-4 cm, the broad phyllodia to 40 cm long, the petioles 15-30 cm long. 

 Scape 30-70 cm long, with 5-12(-15) whorls of flowers, branching at the lower 

 whorls. Bracts scarcely connate, to 1.5 cm long, the free ends linear. Stamens 

 18-°°, the filaments ca. 1.2 mm long, the anthers ca. the same length. Mature 

 receptacle small, ca. 0.5 cm in diameter; achenes small, 1-1.4 x 0.7-0.9 nim, the 

 faces plain, or 1- 2-winged, the beaks 0.2 mm long to obsolete. (FIG. 11m, n.) 



Type collection: 1862, Chapman s.n, in creek on road to Marianna, Jackson 

 Co., Florida (holotype NY). 



Distribution: Extreme southeastern United States from Georgia to Alabama. 

 Apparently not too common, in swamps, ponds, and small streams, usually found 

 in association with var. graminea; intermediates, probably hybrids, are not rare. 

 Collections examined from Alabama, Florida, Georgia. (FIG. 11.) 



lOg. Sagittaria graminea var. macrocarpa (J.G.Sm.) Bogin, comb. nov. 



Sagittaria macrocarpa J.G.Sm. Missouri Bot. Gard. Rep. 6: 27. 1894. 



Perennial with runners. Emersed leaves spatulate, 15-30 cm long, to 2 cm 

 wide, the somewhat thickened phyllodia 15-25 cm long. Scape 15-30 cm long, 

 with 2-4 whorls of flowers. Bracts moderately connate, ca. 0.4 cm long, the free 



