420 



EUPHORBIACEAE 



Locs. — Santa Rosa Mts. (base of, 10 mi. w. of Coachella), Marjorie Clary 1707 (type); 

 Coral Eeef Eanch, Clary 1709; Indio, Jones. Ariz.; Needles Mts., J. Grinncll. 



4. A. californica Bcl<i:. Stems several from a woody root-crown, spreading, 3 

 to 12 inches long; herbage glabrous; leaf -blades obovate, serrulate, abruptly short- 

 acute, mostly petioled, % to iy2 inches long; sepals linear-lanceolate, serrulate, 

 with a whitish margin; sterile whorl of stamens as in no. 1; petals white, greenish- 

 tinged; seeds brownish, reticulated with bead-like ridges, the intervals lineate. 

 Rocky canon floors, 400 to 800 feet : desert side of Santa R-osa Mts. Jan.-Apr. 

 Locs. — This plant, a ■well-marked endemic, is thus far known only from two localities on the 

 east edge of the Santa Eosa Mts. in the Colorado Desert, Marshall Canon and Deep Canon. At 



the latter station it has been collected by Marjorie Clary 

 ^^^^ (no. 1754), who in January, 1933, found only three 



^fe). ^^^L flowering plants and one seedling. 



€ ^^^ Refs. — Argythamnia californica Bdg. Zoe 5:230 



^^Sff^ (1906), type loc. ]\tarshall Cafion, 7 mi. w. of Coachella, 



Hall 5796. Ditaxis californica Pax & Hoffm. ; Engler, 

 Pflzr.4"^-»:70 (1912). 



6. BERNARDIA Houst. 



Shrubs with alternate stipulate leaves. Flow- 

 ers monoecious (in ours) or dioecious, in small 

 spikes or racemes. Staminate flowers with 3 to 

 5-parted valvate calyx; stamens 3 to 20, distinct, 

 on a central receptacle. Pistillate flowers with 

 6 (sometimes 3 or 9) -parted imbricate calyx; 

 ovary 3-celled, 3-ovuled; stigmas nearly sessile, 

 2-lobed. Seeds without caruncle. — Species 24, 

 North and South America. (P. F. Bernard, 

 1749-1825, French botanist.) 



1. B. m5n:icaefolia Wats. Stems many, 

 erect, 3 to 7 feet high, the herbage grayish with 

 a fine but often dense stellate pubescence; leaf- 

 blades thick, ovate, serrate, prominently veined, 

 14 to li/'2 inches long, on short (14 to 1 line) 

 petioles; staminate flowers in axillary racemose 

 clusters; stamens 4 to 8; pistillate flowers ter- 

 minal, sessile; capsules globose, densely stellate-tomentulose, 5 to 7 lines in diam- 

 eter; seeds subglobose, smooth, 3 to 4 lines long. 



Rocky caiions, 500 to 2500 feet: southern Mohave Desert; mountains on north 

 and west sides of the Colorado Desert. South to Lower California and Mexico. Apr. 

 Locs. — Mohave River headwaters (Bot. Cal. 2:70); Cottonwood Spr., Cottonwood Mts., 

 Jepson 12,563 ; pass betw. San Felipe Valley and Grapevine Caiion, e. San Diego Co., Jepson 8775. 

 Refs. — Bernardia MYRiCAEroLiA Wats. Bot. Cal. 2:70 (1880); Jepson, Man. 597 (1925). 

 Tyria myricaefolia Scheele, Linnaea 25:581 (1852), type loc. Neubraunfels, Tex., Lindlieimer 

 (523, 524 ace. Muell. Arg. Linnaea 34:154). Eicinella myricaefolia Muell. Arg. Linnaea 34:154 

 (1865). 



7. ACALYPHA L. 



Herbs or shrubs with serrate stipulate leaves. Flowers monoecious, in catkin- 

 like spikes. Staminate spikes small ; calyx 4-parted, valvate ; stamens 7 to 9, usually 

 8, distinct, on a raised central receptacle. Pistillate spikes short, or the pistillate 

 flowers often solitary or few at the base of the staminate spikes; calyx shallowly 

 8-lobed; ovary 3-celled, 3-ovuled; styles 3, red, in ours filiform-dissected. — Spe- 

 cies about 350, chiefly tropical, all continents except Europe. Capsule often sur- 

 rounded by the enlarged bract. (Greek akalephes, a nettle.) 



Fig. 218. Argythamnia serrata 

 Muell. Arg. a, flowering branch, X 

 % ; h, long. sect, of staminate fl., X 5 ; 

 c, stamen-column, X 10 ; d, long. sect. 

 of pistillate fl., X 4 ; e, seed, X 5. 



