740 PLANT LIFE OF ALABAMA. 
SPERMACOCE L. Sp. Pl. 1: 102. 1753. 
Eighty species, low herbs, tropical regions, mostly American. 
Spermacoce glabra Michx. Fl. Bor. Am. 1:82. 1803, SMOOTH BUTTONWEED. 
Gray, Man. ed.6,225. Chap. Fl. 174. Gray, Syn. FIN. A. 1, pt.2:54. 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 tields, bottom lands. Wash- 
ington, Mobile, and Baldwin counties. Flowers white; Angust to October, Not 
common. Annual weed. 
Type locality: ‘Hab. ad ripas tluminis Ohio et Mississippi.” 
Herb. Geol. Surv. Herb. Mohr. 
Spermacoce parviflora (Meyer) Gray, Syn. F!.N, A. 1, pt. 2:34. 1878. 
SMALL-FLOWERED BUTTONWEED, 
Borreria parviflora Meyer, Prim. Fl, Essequib, 83. 1818, 
B. micrantha Torr. & Gray, P1,N. A. 2:28, 1841. 
Chap. FL 175. Gray, Syn. FILN, AL le. 
West INbDIES, MEXICO, SOUTH AMERICA, 
Louisianian area, Southern Florida. 
ALABAMA: Lower Pine region. Waste places. Monroe County, Mount Pleasart 
(E. A. Smith), Annual, 
Type locality: ‘Hab. in St. Domingo et herbario clariss, Mertensii inest,” 
Herb. Geol. Surv. Herb. Mohr, 
RICHARDIA IL.. 8p. Pl.2:380. 1753. 
(RICHARDSONIA H, B. kK, Nov. Gen. & Sp. 32350. 1820.) 
Ten species, low annuals or percunials, mostly tropical America, 
Richardia scabra lL. Sp. Pl. 1: 830. 1753. MEXICAN CLOVER. 
Richardsonia scabra St. Hilaire, Pl, Us, Bras. &, t.8. 1824-28. 
Chap. FL. Suppl. 624; ed.3, 194. Gray, Syn. PLN. AL 1, pt. 2:32, 
Wrst INDIES, MEXICO TO BRAZIL. 
Louisianian aren. Adventive from the Tropies 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 stems 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. Pl. 1: 104. 1755. 
About 30 species, annual or perennial low herbs, mostly of tropical America, 
Diodia virginiana L. Sp. Pl.1: 104. 1753. COMMON Burron FLOWER. 
Diodia tetragona Walt. Fl. Car. 87. 1788. 
Ell. Sk.1:190. Gray, Man. ed. 6, 225. Chap. Fl. 175. Gray, Syn. FL ON. 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, Cullman 
County, 800 feet, Flowers white; June to October. Abundant weed, Perennial. 
Type locality: “Hab. in Virginiae aquosis.” 
Herb. Geol. Surv. Herb, Mohr. 
Diodia teres Walt. Fl. Car. 87. 1788. PURPLE-FLOWERED BUTTONWEED. 
Spermacoce diodina Michx. Fl, Bor, Am, 1:82, 1808, 
Gray, Man. ed. 6, 225.) Chap. Fl. 176.) Gray, Syn. PLN. Av1, pt.2:35, Coulter, 
Coutr. Nat. Herb. 2: 162. 
