SEPT., IQI4- EUPHORBIACE/E MlLLSPAUGH 387 



Distribution: MEXICO, Schaffner 792, 797 (hb. Berlin); Coulter 14470 

 (hb. Gray); Uhde 1164 pt. (hb. Berlin). Oaxaca, Nelson 1484 

 (F. 413610; hb. Gray); Conzatti & Gonzaks 435 (F. 413602; hb. 

 Gray); Pur pus 3423 (F. 276357, 413612; hb. Gray). Vera Cruz, 

 Purpus 2318 (F. 201867; Mo. 39424; U. S. 840431; hb. Gray). 

 Orizaba, Mueller 1535 pt. (F. 346508; hb. N. Y.); Puebla, Arsene 

 61 =437 (F. 413571; hb. Berlin); Tacubaya, Aschenborn (hb. Berlin); 

 Guanajuato, Duges (F. 409498; hb. Gray); San Luis Potosi, Schaffner 

 1034 pt. (F. 409500; hb. Gray). 



Chamaesyce indivisa (Engelm.) comb. nov. 



Euphorbia dioica indivisa Engelm. Mex. Bd. 2:187. I ^58. 



Prostrate, spreading from an apparently annual root; stems many, 

 5-12 cm. long; branches few,_ divaricate, compressed, pilose above gla- 

 brous beneath. Inflorescence as in dioica but more open. Leaves ovate, 

 5-8 x 1.3-6 mm., glabrous or subglabrous above, slightly pilose beneath, 

 auriculo-oblique at the base, acute, the margin few dentate-serrate 

 especially above though sometimes appearing entire; petioles i mm., 

 long-pilose; stipules subulate-setaceous, pilose. Involucres short- 

 campanulate, the outer surface pilose, the inner glabrous; lobes broadly- 

 deltoid, ciliate; glands transversely-oval, cupped; appendages pale-buff, 

 the larger pair 1.7 x .8 mm., few-crenulate on the lower and outer 

 margin, the smaller pair one-sixth the size, slightly 3-crenulate; pedicels 

 of the male and female flowers glabrous; ovary densely pilose; styles 3, 

 divided to the base, the stigmatic apices undivided. Capsule pyriform, 

 pilose even in age; cocci rounded; seed triangular-ovoid, i.oo x .60 mm., 

 buff, the angles nearly equal and strongly tuberculate at the juncture 

 of the ridges; facets somewhat convex; sulci 4, broad and open; seed- 

 coat farinose. 

 Type locality: NEW MEXICO, Copper Mines, Chas. Wright 1845. Type 



in Gray Herbarium. Other sheets (F. 408360; U. S. 22166). 

 Distribution: MEXICO, Alaman 100910 (hb. de Candolle); San Luis 



Potosi, Parry & Palmer 816, 819 (F. 409505-7; U. S. 22169, 22I 735 



Mp. 39420; hb. Gray) ; Schaffner 855 (F. 409499; hb. Gray) , Durango, 



Palmer 878 (F. 197681, 51930; U. S. 315588; Mo. 29400; hb. Berlin); 



Coahuila, Palmer 1206 (F. 409502; U. S. 22174); Chihuahua, 



Pringle 326 (F. 104207, 197343. 262 753~4; U. S. 22164; Mo. 39401); 



Palmer 381 (F. 409501; U. S. 22175; hb. Gray; hb. Berlin 326); 



Sonora, Lloyd 459 (hb. Gray); Thurber 963 (hb. Gray). 



ARIZONA, Churricahua Mts., Lemmon & wife (F. 1 11081, 196749; 



U. S. 22167); Tucson, Range Reserve, Wooton (F. 413506; U. S. 



690675); Rucker Valley, I^emmon (F. 196750, 1967534, 409459; 



