60 



ARGYTHAMNIA P. Br. Civ. & Nat. Hist. Jam. 338 (1755). 

 Argythamnia humilis (Engelm. & Gray) Muell. Arg. Linnaea, 34 : 

 147 (1865). 

 Aphora humilis Engelm. & Gray, Bost. Journ. Nat. Hist. 5 : 262 



Collected at the Oso on a grassy bank, and in a cultivated field. 

 Procumbent, older plants nearly two feet long; 



March 21 (1484) ; type locality, " in hard clayey soil, west of the 

 Brazos." 

 Argythamnia mercurialina (Nutt.) Muell. Arg. Linnaea, 34: 148 



(1865). 



Aphora mercurialina Nutt. Trans. Am. Phil. Soc. (II.) 5: 174 



Scattered, in rich and usually shaded ground about Kerrville, alti- 

 tude 1625-1800 feet. 



April 24 (1648) ; type locality, " prairies of the Red river. 



EUPHORBIA L. Sp. PI. 450 (1753). 

 Euphorbia angusta Engelm.; Torr. Mex. Bound. Surv. 2: 189 



Euphorbia NeallyiCovAt. & Fisher, Cont. U. S. Nat. Herb. 2: 391 

 (1894). 



In dry, stony ground about Kerrville, altitude 1625-1900 feet. 

 Plentiful but scattered. 



May 14 (1738). 



Euphorbia campestris Cham. & Schlecht. Linnaea 5 : 84 (1830). 

 Euphorbia esulaeformis Schauer, Linnaea, 20: 729 (1847). 



On the steep, stony left bank of the Guadalupe at Kerrville, altitude 

 1625 feet. The numerous erect stems from a stout, perennial root. 

 Plentiful in this one situation, but not noticed elsewhere. 



April 19 (1599); type locality, "in planitie inter Tlachichuca et 

 Tepetitlan." 

 Euphorbia dentata Michx. Fl. Bor. Am. 2: 211 (1803). 



Plentiful in rich ground at one time broken for a street, near Corpus 

 Christi. Also abundant on the summits of hills about Kerrville. A much 

 lower form than usual. The broader and shorter leaves nearly entire. 



March 27 (1505) ; type locality, in Tennessee, near Nashville. 

 Euphorbia Fendleri T. & G. Pac. R. R. Rep. 2 : 175 (1855). 



Plentiful on a dry, stony slope along Town Creek, at Kerrville, alti- 

 tude 1630 feet. The slender stems prostrate from a perennial root. 



June 16 (1870). 



