426 PLANT LIFE OF ALABAMA, 
Arisaema dracontium (1l.) Schott, Melet. 1:17. 1832, DRAGON-ROOT. 
Arum draconiium 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 Eneland, west to Minnesota, 
south to Ohio Valley; Florida to eastern Texas, 
ALABAMA: Mountain region to Lower Pine belt. Rich copses. Cullman County. 
Tuscaloosa County (4. A. Smith), Clarke County, Choctaw Corner. April; not 
frequent. 
Type locality: ‘ Hab. in America.” 
Herb. Geol. Surv. Herb. Mohr, 
LEMNACEAE. Duckweed Family. 
SPIRODELA Schileid. Linnaca, 13:391. 1829. DucKWeeED. 
A single species, of temperate regions. 
Spirodela polyrhiza (L.) Schleid. Linnaea, 13:391. 1839. 
Lemna polyrhiza L. Sp. Pl. 2:970. 1753. 
EM. Sk, 2:518. Gray, Man.ed.6, 552. Chap. Fl. 443. Coulter, Contr. Nat. Herb. 
2:453, 
Europe, SIBERIA, ASIA, AUSTRALIA, Maprerka, Nori AND Soutru 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: Allover the State, Stagnant waters. Mobile County; frequent. 
Type locality: “ Hab. in Europae paludibus, fossis.” 
Herb. Geol. Surv. Herb. Mohr. 
’ 
LEMNA L.Sp. P1l2:970. 1753. 
Six species, of temperate and warmer regions, Floating, almost cosmopolitan, 
plants, 
Lemna minor L. Sp. P1.2: 970. 1753. 
Europe, Africa, AUSTRALIA, NortTH AMERICA, West INDIES TO SOUTH AMERICA, 
Canadian zone to Louisianian 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: ‘Mab, in Europae aquis quictis.” 
Herb. Mohr. 
Lemna trisulca L. Sp. P1l.2:970, 1753. 
Gray, Man. ed. 6,552. Coulter, Contr. Nat. Herb. 22453, 
Distribution as wide as that of the last. 
MUROPE, 
STAR DUCKW2ED. 
ALABAMA: Over the State. In stagnant water. Mobile County. Mareh. 
Type locality: “Hab. in Europae sub aquis pigris puris.” 
Herb. Mohr. 
MAYACACEAE. Mayaca Family. 
MAYACA Aubl. Pl. Guinan. 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. 
Mayaca fluviatilis Aubl. Pl. Guian. 1:42. 1775. 
M. michauxii Schott & Endl. Melet, 1:24. 1832. . 
EM.Sk.1:50. Gray, Man. ed.6,538. Chap. P1499. Griseb. Fl. Brit. W. Ind. 526, 
West INDIES, MEXICO, GUIANA TO BRAZIL. 
Louisianian area, North Carolina to Florida, west to Texas. 
MOSSLIKE MAYACA, 
ALABAMA: Central Prairie region to the coast. Shallow ponds, springy places, 
wet banks, pine-barrenstreams, EufaulaCounty (#&. 4. 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. 
