Euphorbia. EtPHORBIACE^E. 73 



involucres campanulate, less than a line long, the lobes finely fringed : glands 2 to 

 4, shortly stipitate, circular and discoid, more or less concave, immarginate or 

 rarely with a narrow margin, yellowish or purplish : staminate flowers very numer- 

 ous : capsules nearly a line broad, the lobes rounded on the back : seeds round- 

 ovate, obtusely angled, smooth or often obscurely rugose. Pacif. E. Rep. v. 15, 

 t. 18 ; Boiss. 1. c. 28. 



In dry valleys in the Coast Ranges from the Sacramento to Fort Tejon, near Fort Mohave 

 (Cooper), anil W. Nevada. 



2. E. albomarginata, Torr. & Gray. Glabrous : stems numerous from a woody 

 perennial base, prostrate or decumbent, 2 to 12 inches long : leaves nearly or- 

 bicular, 2 to 4 lines in diameter, often retuse above and somewhat cordate at 

 base, with a thin whitish edge ; stipules united into a conspicuous membranaceous 

 white triangular scale, entire or slightly lacerate : involucres mostly solitary, cam- 

 panulate or turbinato, less than a line long ; the 4 orange or brownish glands with 

 a very conspicuous dilated petaloid appendage, which is white or rose-colored and 

 mostly entire : capsule nearly a line long, the lobes angled on the back : seeds 

 oblong, 4-angled. Pacif. R. Rep. ii. 1 74 ; Boiss. 1. c. 30. E. Hartwegiana, Boiss. 

 1. c. 31. 



S. California, from Fort Tejon to San Diego, and eastward to Texas ; also Mexican. 



3. E. polycarpa, Benth. Glabrous or somewhat finely pubescent : stems nu- 

 merous from a perennial at length woody base, prostrate or ascending, 2 to 12 

 inches long : leaves round-ovate to oblong, obtuse or acutish, usually slightly cordate 

 at base, 1 to 3 lines long ; stipules short-triangular to lanceolate, ciliate, minute : 

 involucres mostly solitary in the axils, turbinate-campanulate, half a line long or 

 less ; glands dark purple (sometimes yellow), the white or rose-colored petaloid 

 somewhat crenate margin varying from very narrow (or sometimes none) to very 

 broad and conspicuous : capsule small, with angled lobes : seeds oblong, 4-angled, 

 about half a line long, smooth or sometimes obscurely rugose. Bot. Sulph. 50 ; 

 Boiss. 1. c. 50. 



Var. vestita. Hoary and more or less tomentose throughout with short close 

 pubescence. E. melanadenia, Torrey, Pacif. R. Rep. iv. 1 35. 



From Santa Barbara to Cape St. Lucas and eastward to the fiio Grande. E. ciiwrascens, Engelm. 

 (Bot. Mex. Bound. 186), is a form with the appendage of the glands very narrow or wanting. 



* * Seeds transversely nndulatewrinkled or costate. 

 i Annual or perennial : leaves entire. 



4. E. setiloba, Engelm. Annual, prostrate, pubescent throughout with soft 

 spreading somewhat glandular hairs, reddish : leaves round-obovate to oblong, 1 to 

 3 lines long, mostly small, rounded above, cordate or slightly cuneate at base, on 

 slender petioles a half to a line long ; stipules nearly obsolete : involucres solitary in 

 the axils and in small leafy clusters terminating the branchlets, narrowly turbinate, 

 nearly glabrous within, the lobes ciliolate ; glands erect, purple, with a narrow tim- 

 briate white or rose-colored margin : capsules pubescent, angled, scarcely over a half 

 line long : seeds oblong, acutely 4-angled, somewhat rugose transversely. Pacif. 

 R. Rep. v. 364 ; Boiss. 1. c. 44. 



San Bernardino (Parry), and in the Colorado Valley from Fort Yuma northward, TJiomas, 

 Newberry, Palmer. 



5. E. pediculifera, Engelm. Usually perennial, hoary throughout with a close 

 puberulence : stems numerous, prostrate or ascending : leaves ovate to oblong, rounded 

 or obtuse above, broad and slightly cordate to cuneate at base, 2 to 6 lines long : 

 involucres large, hemispherical, mostly solitary ; glands large, dark brown, with a 

 conspicuous (sometimes nearly wanting) white or rose-colored crenate margin : cap- 

 sules pubescent, a line long, the lobes rounded on the back : seeds broad-oblong, 



