328 PLANT LIFE OF ALABAMA. 
ALABAMA: Coast plain. Shallow pond near the western shore of Mobile Bay 
shell road, 1885. Locality since obliterated (C. Zimmer). A waif from higher 
latitudes. 
Type locality not ascertained. 
Herb. Geol. Surv. Herb. Mohr. 
Potamogeton perfoliatus L. Sp. P].1:126. 1753. 
Gray, Man. ed. 6,562. Chap. Fl.446. Morong, Mem. Torr. Club, 3:33, ¢. 40. 
EuROPE, GUATEMALA, NICARAGUA. ; , 
Canadian zone, Alleghenian to Louisiunian area. Nova Scotia, New Brunswick, 
Quebec, Ontario, New England, west to Michigan and Minnesota, south to New Jer- 
sey, western Tennessee, Florida (!), and Texas. 
ALABAMA: Coast plain. Gently flowing water. Mobile River delta. Dog River, 
Abundant in this locality. . aae 
Type locality: ‘Hab. in Europae lacubus fluviisque argillosis.” 
tierb. Geol. Surv. Herb. Mohr. 
Potamogeton crispus L. Sp. Pl.1:126. 1753. 
Gray, Man. ed. 6,562. Morong, Mem. 'forr. Club, 3:36, ¢. 44. 
TEMPERATE EUROPE. eer 
Alleghenian to Louisianian area. New England to New Jersey, Virginia, and 
western Florida. 
ALABAMA: Coast plain. Gently flowing water. Mobile County, estuaries of Mobile 
and Dog rivers. Flowers and matures fruit in July. 
Type locality: ‘Hab. in Europae fossis et rivulis.” 
Herb. Geol. Surv. Herb. Mohr. 
Potamogeton pusillus L. Sp. P].1:127. 1753. 
Gray, Man. ed. 6, 563. Wats. Bot. Calif. 2:128. Morong, Mem. Torr. Club, 3: 45, 
t. 53. 
EUROPE. 
Alleghenian to Louisianian area. New Brunswick and Ontario to Saskatchewan; 
New England (Mount Desert Island) west to Michigan, Missouri, Colorado, and 
California; New Jersey to Florida, west to Texas. 
ALABAMA: Coast plain. The form with filiform stem, setaceous, cuspidate leaves 
(P. tennissimus auct.), estuary Mobile River. Flowers inMay. Infrequent. 
Type locality: ‘“Hab.in Europae paludibus.” 
Herb. Geol. Surv. Herb. Mohr. 
Potamogeton diversifolius Raf. Med. Rep. ser. 2, 5:354. 1808. 
Potamogeton hybridus Michx. Fl. Bor. Am.1:100. 1803. Not Thuill. 
Ell. Sk.1:222. Gray, Man. ed.6,560. Chap. Fl. 446. Coulter, Contr. Nat. Herb. 
2:456. Morong, Mem. Torr. Club, 3:48, t. 55. 
Alleghenian to Louisianian area. New England (Mount Desert Island) west to 
Michigan, Nebraska, and Missouri, south to New Jersey, Florida, and the Gulf States, 
extending to western Texas and New Mexico. 
ALABAMA: Central Prairie region toCoast plain. Frequent in pine-barren streams 
and shallow ponds. Mobile, Baldwin, and Montgomery counties. Flowers in June 
with mature fruit. 
Type locality of P. hybridus: ‘Hal. in aquis stagnantibus Carolinae.” 
Herb, Geol, Surv. Herb. Mohr. 
RUPPIA L.Sp. Pl.1:127. 17538. Ditcuarass. 
- 
Two or 3 species, aquatics, cosmopolitan outside of the Arctic zone. North 
America, 2 species. 
Ruppia maritima L. Sp. Pl.1:127. 1753. 
Ell. Sk.1:581. Gray, Man. ed. 6, 564. Chap. F1.445. Griseb. Fl. Brit. W. Ind. 506. 
Wats. Bot. Calif. 2:193. Coulter, Contr. Nat. Herb.2:457. Morong, Mem. Torr. 
Club, 3:55, t. 62. 
Evurorve, WEst INDIES. 
Canadian zone to Louisianian area. Along the seacoast. Nova Scotia, New 
Brunswick, New England (Mount Desert Island), south to Florida and Texas; 
Pacific coast. 
ALABAMA: Littoral belt. In brackish or saline pools, ditches. Mobile County, 
Mobile Bay; abundant. Flowers and mature fruit in June. Annual, ? 
Type locality: ‘Hal. in Europae maritimis.” 
Herb. Geol. Surv, Herb, Mohr, 
