740 PLANT LIFE OF ALABAMA. 



SPERMACOCE L. Sp. PI. 1 : 102. 1753. 



Eighty species, low herbs, tropical regions, mostly American. 

 Spermacoce glabra Michx. Fl. Bor. Am. 1 : 82. 1803. SMOOTH BUTTONWKED. 



Gray, Man. ed.6,225. Chap. Fl. 174. Gray, Syn. Fl. N. A. 1, pt. 2:34. Coulter, 

 Contr. Nat. Herb. 2 : 161. 



Carolinian and Louisianian areas. Southern Ohio and western Tennessee to 

 Florida, Texas, and Arkansas. 



ALABAMA : Lower Pine region. Coast plain. Low lields, bottom lauds. Wash- 

 ington, Mobile, and Baldwin counties. Flowers white; August to October. Not 

 common. Annual weed. 



Type locality: " Hab. ad ripas fluminis Ohio et Mississippi." 



Herb. Geol. Surv. Herb. Mohr. 



Spermacoce parviflora (Meyer) Gray, Syn. F3. N. A. 1, pt. 2 : 34. 1878. 



SMALL-FLOWERED BUTTONWKED. 



Borreria parviflora Meyer, Prim. Fl. Essequib. 83, 1818. 



B. micrantha Torr. & Gray, Fl. N. A. 2 : 28. 1841. 



Chap. Fl. 175. Gray, Syn. Fl. N. A. 1. c. 



WEST INDIES, MEXICO, SOUTH AMERICA. 



Louisianian area. Southern Florida. 



ALABAMA: Lower Pine region. Waste places. Monroe County, Mount Pleasant 

 (E. A. Smith). Annual. 



Type locality: " Hab. in St. Domingo et herbario clariss. Merteusii inest." 



Herb. Geol. Surv. Herb. Mohr. 



RICHARDIA L. Sp. PI. 1 : 330. 1753. 

 (RICHARDSONIA H. B. K. Nov. Gen. & Sp. 3 : 350. 1820.) 

 Ten species, low annuals or perennials, mostly tropical America. 

 Richardia scabra L. Sp. PI. 1 : 330. 1753. MEXICAN CLON 1:1;. 



liichardsonia scabra St. Hilaire, PI. Us. Bras. 8, t. S. 1824-28. 



Chap. Fl. Suppl. 624 ; ed. 3, 194. Gray, Syn. Fl. N. A. 1, pt. 2 : 32. 



WEST INDIES, MEXICO TO BRAZIL. 



Louisianian area. Adventive from the Tropics and fully naturalized on the coast 

 of Georgia, in Florida, and thence to Mississippi. 



ALABAMA: Lower Pine region. Coast plain. Dry sandy waste places. Flowers 

 white; June to October and November. Abundant in cultivated ground. A luxu- 

 riant annual; assurgent steins 2 to 3 feet long. Occasionally in the northern part of 

 the State, in gardens. Cullman County. 



Economic uses : Valuable fodder plant. 



Type locality : "Hab. in Vera Cruce." 



Herb. Geol. Surv. Herb. Mohr. 



DIODIA L. Sp. PI. 1 : 104. 1753. 



About 30 species, annual or perennial low herbs, mostly of tropical America. 

 Diodia virginiana L. Sp. PI. 1 : 104. 1753. COMMON BUTTON FLOWER. 



Diodia tetragona Walt. Fl. Car. 87. 1788. 



Ell. Sk. 1 : 190. Gray, Man. ed. 6, 225. Chap. Fl. 175. Gray, Syn. Fl. N. A. 1, pt. 

 2 : 35. Coulter, Contr. Nat. Herb. 2 : 161. 



Carolinian and Louisianian areas. New Jersey through the lower country to 

 Florida, west to Texas and Arkansas. 



ALABAMA : Over the State, except the highest mountain ranges. In low culti- 

 vated ground, waste places, roadsides. Clay County, Delta, 1,700 feet. Cullmau 

 County, 800 feet. Flowers white; June to October. Abundant weed. Perennial. 



Type locality: "Hab. in Virginia*) aquosis." 



Herb. Geol. Surv. Herb. Mohr. 



Diodia teres Walt. Fl. Car. 87. 1788. PURPLE-FLOWERED BUTTONWEKD. 



Spermacoce diodina Michx. Fl. Bor. Am. 1 : 82. 1803. 



Gray, Man. ed. 6, 225. Chap. Fl. 176. Gray, Syn. Fl. N. A. 1, pt. 2 : 35. Coulter, 

 Contr. Nat. Herb. 2 : 162. 



