^"P^'orbia. EUPHORBIACE.'E. ko 



involucres camimnulato, less tluin a line long, the Iol)os finely fringo.l : glands 2 to 

 4, shortly st.pitate, circular an<l discoid, more or less concave, inunar^nnate or 

 rarely w,th a narrow n.argin, yellowish or purplish : sta.niuate ilc:wers vexf numer- 

 ous : capsules near y a hue broad, the lobes roun.led on the back: seeds roun.l- 

 ovate, obtusely angled, smooth or often obscurely rugose. — Pacif. K. ]{ei). v. 15 

 t. lo ; J>oiss. 1. c. 28. ' ' 



(^-^a^d'^^rJIJva;;:.''""' ''"'^" '"'" '•" ''"™'""^« ^« ^--t ^'^-' "-'• Fort Mohave 



2. R albomarginata, Torr. & (Way. Glabrous : stems numerous from a woody 

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



W "w-f? fl Tr'\ ''"f"''^'''' "^" '"^"'^ '"^^"^« •'^"'' somewhat cordate at 



Kiso, with a tun wh.fsh edge ; stipules united into a conspicuous membranaceous 

 vl .to nangular scale, entire or shghtly lacerate: involucres mostly solitary, cam- 

 l>anulato or turbinate ess than a line long; the 4 orange or brownish gland with 

 a very conspicuous . date.l petaloid appendage, which is white or rose-colored and 



bio ^ i V r^^'p' ■rT'^o" ^'■•','-"^' ^''^ ^"''^^ ^"oled on the back: seeds 

 oblong, 4-angled.-Pacif. K. Hep. ... 174; Boiss. 1. c. 30. E. UarUoegiana, Boiss. 



S. Californin, from Fort T.joi, to San Diego, ami eastward to Te.xas ; also Mexican. 



3. E polycarpa, ]5i-nth. r.labrous or somewhat finely pubescent: stems nu- 

 merous from a perennial at length woody base, prostrate or asce.uling, 2 to 12 

 inches long : leaves round-ovate to oblong, obtuse or acutish, usually ..lightly 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 lon-r or 

 less; glands dark puri.le (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 lino long, smooth or sometimes obscurely rugose. - Bot. Sulph 50 • 

 -boiss. i. c. 50. V u 1 , 



Var. vestita.^ Iloary and more or less tomentoso throughout with short close 

 pubescence. — h. melanaUenia, Torrcy, Pacif. II. Rep. iv. 135. 



From Santa Barbara to C.-ipe St. Lueas and eastward to the Rio Grande.' E. rinerascms En^elm 

 (Bot. Me.v. Bound. 186), is a form with the appendage of the glands very narriw or wan't.ng? 



* * Seeds tmnaverscli/ undulate-wrinhled or eostnte. 

 ■»- Annual or perennial : leaves entire. 



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

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

 3 lines long mostly small, rounded above, cordate or slightly cuneate at ba"se on 

 sender petioles a half to a lino long ; stipules nearly obsolete : involucres solitary in 

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

 nearly g abrous within, the lobes ciliolate ; glan.ls ere<;t, purple, with a narrow fim- 

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

 lino long : seeds oblong, acutely 4-angle(l, somewhat rugose transversely. —Pacif 

 II. Pep. V. 364 ; Boiss. 1. c. 44. 



San Bernardino {Parry), and in the Colorado Valley from Fort Yuma northward, 77wmrw. 

 rscicberry, Palmer. ' 



5. R 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 G lines lon^r : 

 involucres large, hemispherical, mostly solitary ; glands large, dark brown, witlfa 

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

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



