426 PLANT LIFE OF ALABAMA. 
Arisaema dracontium (L.) Schott, Melet.1:17. 1832. DRAGON-ROOT. 
Arun dracontium L. Sp. Pl. 2:964. 1753. 
Ell. Sk. 2: 629. Gray, Man. ed. 6, 549. Chap. Fl. 440. Coulter, Contr. Nat. Herb. 
2: 453. 
Alleghenian to Louisianian area. Ontario; New England, west to Minnesota, 
south to Ohio Valley; Florida to eastern Texas. 
ALABAMA: Mountain region to Lower Pine belt. Rich copses. Cullman County. 
Tuscaloosa County (#. 4d. Smith), Clarke County, Choctaw Corner. April; not 
frequent. 
Type locality: ‘‘ Hab. in America.” 
Herb. Geol. Surv. Herb. Mohr. 
LEMNACEAE. Duckweed Family. 
SPIRODELA Schleid. Linnaea, 13:391. 1829. DuckWrEb. 
A single species, of temperate regions. 
Spirodela polyrhiza (L.) Schleid. Linnaea, 13:391. 1839, 
Lemna polyrhiza L. Sp. Pl. 2:970, 1753. 
ENL Sk. 2:518. Gray, Man.ed.6, 552. Chap. Fl. 443. Coulter, Contr. Nat. Herb. 
2: 453, 
Evuropr, SIBERIA, ASIA, AUSTRALIA, MaprEirA, NorTH anp SouTnH AMERICA, 
WEst INDIES TO CENTRAL AMERICA. 
Boreal region to Louisianian area. Canada from the Atlantic to the Pacitic Ocean. 
Throughout the Atlantic Eastern States, west to Texas and Arkansas. 
ALABAMA: All over the State. Stagnant waters. Mobile County; frequent. 
Type locality: ‘“ Hab. in Europae paludibus, fossis.” 
Herb. Geol. Surv. Herb. Mohr. 
LEMNA L. Sp. Pl.2:970. 1753. 
Six species, of temperate and warmer regions. Floating, almost cosmopolitan, 
plants. 
Lemna minor L. Sp. Pl. 2: 970. 1753. 
Europe, Arrica, AUSTRALIA, NORTH AMERICA, WEST INDIES TO SOUTH AMERICA, 
Canadian zone to Lonisianian area. All over the continent to north latitude 58°. 
Alabama: Over the State in pools, stagnant water; common everywhere. Mobile 
County; February, March. 
‘Type locality: ‘‘Hab. in Europae aquis quietis.” 
Her). Mohr. 
Lemna trisulea L. Sp. P]l.2:970. 1753. Star DuckwiaeEp. 
Gray, Man. ed. 6,552. Coulter, Contr. Nat. Herb. 2: 453. 
Distribution as wide as that of the last. 
Europe, 
ALABAMA: Over the State. In stagnant water. Mobile County. March. 
Type locality: “Hab. in Europae sub aqnis pigris puris.” 
Herb. Mohr. 
MAYACACEAE. Mayaca Family. 
MAYACA Aubl. Pl. Guian. 1:42. 1775. 
_ Seven species, tropical and subtropical aquatics, America. Atlantic North Amer- 
ica, southern, 1 species. 
Mayaca aubleti Michx. Fl. Bor. Am. 1:26. 1803. MOSSLIKE Mayaca. 
Mayaca fluviatilis Aubl. Pl. Guian. 1:42. 1775. 
VU. michauxii Schott & Endl. Melet.1:24. 1832. 
Ell. Sk.1:50. Gray, Man. ed. 6,538. Chap. F'1.499. Griseb. Fl. Brit. W. Ind. 526. 
West InDigs, MEXICO, GUIANA TO BRAZIL. : 
Louisianian area. North Carolina to Florida, west to Texas. 
ALaBama: Central Prairie region to the coast. Shallow ponds, springy places, 
wet banks, pine-barrenstreams. Eufaula County (£. A. Smith). Clarke, Washington, 
Mobile, and Baldwin counties. Flowers lilac, June to July; abundant. Perennial. 
Type locality: ‘‘Hab. a Carolina ad Floridam.” 
Herb. Geol. Surv. Herb. Mohr. 
