426 PLANT LIFE OF ALABAMA. 



Arisaema dracontium (L.) Scliott, Melet. 1 : 17. 1832. DRAGON-HOOT. 



Arum dracontium L. Sp. PI. 2 : 964. 1753. 



Ell. Sk. 2:629. Gray, Man. ed. 6, 549. Chap. Fl. 440. Coulter. Contr. Nut. 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. Cnllman County. 

 Tuscaloosa County (E. A. Smith). Clarke County, Choctaw Corner. April; not 

 frequent. 



Type locality: " Hab. in America." 



Herb. Geol. Surv. Herb. Mohr. 



LEMNACEAE. Duckweed Family. 

 SPIRODELA Schleid. Liunaea, 13:391. 1829. DUCKWEED. 



A single species, of temperate regions. 

 Spirodela polyrhiza (L.) Schleid. Linnaea, 13:391. 1839. 



Lemna polyrhiza L. Sp. PL 2 : 970. 1753. 



Ell. Sk. 2 :518. Gray, Man. ed. 6, 552. Chap. Fl. 443. Coulter, Contr. Nat. Herb. 

 2 : 453. 



EUROPE, SIBERIA, ASIA, AUSTRALIA, MADEIRA, NORTH AND SOUTH AMERICA, 

 WEST INDIES TO CENTRAL AMERICA. 



Boreal region to Louisianian area. Canada from the Atlantic to the Pacific 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, ibssis." 



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. PI. 2 : 970. 1753. 



EUROPE, AFRICA, AUSTRALIA, NORTH AMERICA, WEST INDIES TO SOUTH AMERICA. 



Canadian zone to Louisiauian area. All over the continent to north latitude 58. 



Alabama: Over the State in pools, stagnant water; common everywhere. Mobile 

 County; February, March. 



Type localitv : "Hab. in Europae aquis quietis." 



Herb. Mohr. 



Lemna trisulca L. Sp. PL 2 : 970. 1753. STAR DUCKWEED. 



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 aquis pigris puris." 

 Herb. Mohr. 



MAYACACEAE. Mayaca Family. 

 MAYACA Aubl. PI. 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. 



Mayacafluviatilis Aubl. PL Guian. 1 : 42. 1775. 



M . michauxii Schott & Eudl. Melet. 1 : 24. 1832. 



Ell. Sk. 1:50. Gray, Man. ed. 6, 538. Chap. Fl. 499. Griseb. Fl. Brit. W. Ind. 526. 



WEST INDIES, MEXICO, GUIANA TO BRAZIL. 



Louisianian area. North Carolina to Florida, west to Texas. 



ALABAMA : Central Prairie region to the coast. Shallow ponds, springy places, 

 wetbanks, pine-barren streams. Eufaula County (K. 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. 



