OF ARTS AND SCIENCES. 149 



EuriioitBiA SERPENS, IIBK. At Snn Lorenzo de Laguna, Coa- 

 huila (1192, 1195); 820 Parry & Palmer. Also var, kadicans, 

 Engelm., at Corpus Christi (1190), and Sutherland Springs (1191). 



Euphorbia Serrula, Engelm. At San Lorenzo de Laguna 

 (1194) ; 810 Parry & Palmer, in part. 



Euphorbia polycarpa, Beuth. At Monterey, Nuevo Leon 

 (1197), and at Juraz, Coahuila (1204), Also at San Lorenzo de 

 Laguna (1205), a stout form, from a thick woody root, the involucres 

 nearly smooth and unappendaged, and the capsules less pubescent. 



Euphorbia maculata, Linn, At Bluffton (1198), Georgetown 

 (1202), and Sutherland Springs, Texas (1208, 2048, 2049), and at 

 Parras, Coahuila (1210). 



Euphorbia villifera, Scheele. In the Caracol Mountains 

 (1199); and in the Sierra Madre, south of Saltillo, a more naked 

 form with coarsely toothed leaves, the same as 2084 Berlaudier. 



EuriiouBiA gltptosperma, Engelm. At Laredo, on the Rio 

 Grande (1200), Guadalupe (1201), and Sutherland Springs (2047). 



Euphorbia Fendleri, Torr, & Gray. At Sutherland Springs, 

 Texas (1203). 



Euphorbia adenopteka, Bertol. At Soledad, Coahuila (1206), 

 at Morales (855 Schaffner) and San Luis Potosi (1034 SchafFuer, in 

 part), and at Guanajuato (Duges) ; 816 and 819 Parry & Palmer. 



Euphorbia albomarginata, Torr. & Gray. At Sutherland 

 Springs (1207), and west of San Antonio, Texas (1212). 



Euphorbia Preslii, Guss. At Sutherland Springs (2050) and 

 Bluffton, Texas (2051), at Parras (1209) and Monclova, Coahuila 

 (1211), at San Luis Potosi (856 Schaffner, in part), and at Guanaju- 

 ato (Duges) ; 808 and 814 Parry & Palmer, Somewhat variable in 

 pubescence, and quite so in the markings of the seeds, Schaffner's and 

 Dunes' specimens having the seeds deeply pitted, rather than rugose. 

 Popularly known as " Yerba de la Golondrina." 



Euphorbia Cumbr^, Boiss. Agreeing very well with the de- 

 scription, but taller (6 to 9 inches high), the involucres pedicellate, 

 and capsule angled. In the mountains north of Monclova (1213). 



Euphorbia zygophylloides, Boiss. At Sutherland Springs, 

 Texas (1214). 



Euphorbia graminea, Jacq. At Parras, Coahuila (1215, 1216), 

 and at San Luis Potosi (863 Schaffner). 



Euphorbia antisyphilitica, Zucc, In the mountains west of 

 Saltillo (1217), and about San Luis Potosi (867 Schaffner); 821 

 Parry & Palmer. 



