POND WEEDS. 327 



ALABAMA: Aclventive. In a ditch, suburbs of Mobile (Karl Zimmer}, 1886. Not 

 found since. 



Type locality: "Hab. in Europae paludibus." 

 Herb. Geol. Surv. 



Herb. Mohr. 



SPARGANIACEAE. Bur-reed Family. 



SPARGANIUM L. Sp. PL 2:971. 1753. 



Eight species, of cooler temperate regions. Eastern North America, 4 species. 

 Perennial aquatics. 



Sparganium androcladum (Engelin.) Morong, Bull. Torr. Club, 15: 78. 1888. 



Sparganium simplex var. androcladum Engelm. in Gray, Man. ed. 5, 481. 1871. 



Ell. Bk. 2 : 521. Gray, Man. ed. 6, 548. Chap. Fl. 443. 



Alleghenian to Louisianian area. New Brunswick, Ontario to Saskatchewan and 

 Vancouver Island; New England west to Minnesota and Missouri, south to Florida, 

 Louisiana, and Arkansas. 



ALABAMA : Throughout the State. Shallow ponds from the Tennessee Valley to 

 the coast. Clay County, Elders, 1,000 feet. Cullman County. Tuscaloosa County, 

 Tannehill (E. A. Smith). Montgomery and Mobile counties. Flowers May to July. 

 Frequent. 



Type locality: " From New England southward and especially westward." 



Herb. Geol. Surv. Herb. Mohr. 



NAJADACEAE. Pondweed Family. 

 POTAMOGETON L. Sp. PL 1:126. 1753. PONDWEED, 



About 65 species. Floating aquatic herbs, mostly of the cooler temperate zone. 

 Cosmopolitan. Europe, Asia, North America, 37 species; endemic in Atlantic 

 North America, 14. 



Potamogetoii pulcher Tuckerin. Am. Journ. Sci. 45:38. 1843. 



Bigel. Flor. Bost. 63 (as P. natans L.). Gray, Man. ed. 6, 560. Chap. Fl. Suppl. 

 652. Morong, Mem. Torr. Club. 3 : 16, t. 28. 



Allegheniau to Louisianian area. From Vermont to Georgia, Louisiana, and Mis- 

 souri. 



ALABAMA: Central Prairie region. In stagnant water. Montgomery County, 

 " Cypress swamp" near city. October. Rare. 



Type locality: u Hab. Ponds and slow streams. Medford, Stoneham [Massa- 

 chusetts]." 



Herb. Geol. Surv. Herb. Mohr. 



Potamogeton lonchites Tuckerm. Am. Journ. Sci. ser. 2, 6 : 226. 1848. 



Potamogeton fluitans Roth, Fl. Germ. 1: 72. 1788?. 



Ell. Sk. 1:221. Gray, Man. ed. 6, 560. Chap. Fl. 446. Coulter, Contr. Nat. 

 Herb. 2 : 457. Wats. Bot. Calif. 2 : 196. 



EUROPE. 



Alleghenian, Carolinian, and Louisianian areas. Ontario and New England west 

 to Michigan, Minnesota, and Missouri, south to Florida and Texas, and in Cali- 

 fornia. 



ALABAMA: Coast plain. So far only observed in the tide- water region. Gently 

 flowing water in the delta of Mobile River. Flowers in June and July. Not infre- 

 quent. 



Type locality: "In the Charles at Newton and Natick [Massachusetts]." 



Herb. Geol. Surv. Herb. Mohr. 



Potamogeton alpinus Balbis, Misc. Bot. 13. 1804. 



Potamogeton rufescens Schrad. in Cham. Adn. Fl. Ber. 5. 1815. 



Gray, Man. ed. 6, 560. Wats. Bot. Calif. 2:195. Coulter, Contr. Nat. Herb. 

 2 : 457. Morong, Mem. Torr. Club, 3 : 19, t. 30. 



EUROPE. 



Canadian zone to Louisianian area. New Brunswick, Quebec, Vancouver Island, 

 Oregon, California, New York, New Jersey, and western Florida. 



Morong, Najadaceae of North America, Mem. Torr. Club, 3: No. 2. 1893, 



