61 



Euphorbia maculata L. Sp. PL 455 (1753). 



In low rich ground at Corpus Christi, altitude 40 feet, and at Kerr- 

 ville in the gravelly bed of the Guadalupe, altitude 1600 feet. 



May 30 (1804); type locality, North America. 

 Euphorbia nutans Lag. Gen. & Sp. 17 (1816). 



Euphorbia Pre slii Guss. Fl. Sic. Prodr. i : 539 (1827). 



In the gravelly bed of the Guadalupe, at Kerrville, altitude 1600 feet. 

 Ascending, usually stout and branching. 



June 27 (1922). 

 Euphorbia obtusata Pursh, Fl. Am. Sept. 606 (1814). 



In a grassy meadow at the Oso, altitude 10 feet. A rather common 

 plant about Corpus Christi, in rich ground ; often large and spreading. 



March 21 (1475); tv P e locality, Virginia, near Staunton. 

 Euphorbia polycarpa Benth. Bot. Sulph. 50 (1844). 



Prostrate, growing in open ground at Corpus Christi, more often 

 along the railroad embankment between the ties. 



March 20 (1463) ; type locality, " Bay of Magdalena." 

 Euphorbia prostrata Ait. Hort. Kew. Ed. i, 2 : 139 ( ). 



Prostrate and spreading, in gravel, on the left bank of the Guadalupe, 

 at Kerrville, altitude 1600 feet. My specimens agree well with several 

 plants from Mexico, but do not altogether with the majority of the speci- 

 mens noticed, which are from Florida and the eastern part of the coun- 

 try, and much smoother. Perhaps a distinct species. 



June 27 (1918). 

 Euphorbia serpens H.B.K. Nov. Gen. 2: 52 (1817). 



On the plateau near the Oso, in rich ground, altitude 30 feet. Com- 

 mon about Corpus Christi, in bare, open ground. 



March 21 (1467); type locality, " Cumanae prope Bordones et Punta 

 Araya. ' ' 

 Euphorbia tetrapora Engelm. Mex. Bound. Surv. 2: 191 (1859). 



Plentiful in an arroyo southeast of Corpus Christi, growing with E. 

 obtusata. Low and spreading, dark dull green in color. 



March 27 (1509) ; range, Georgia to Texas. 



ANACARDIACEAE. 



RHUSL. Sp. PI. 265 (1753). 

 Rhus aromatica Ait. Hort. Kew. i : 367 (1789). 



Rhus Canadensis Marsh. Arb. Am. 129 (1785), not Mill. 

 A branching bush, occurring frequently on hillsides about Kerrville, 

 altitude 1625-2000 feet. 

 April 26 (1658). 



