236 Euphorbiaceae 



base, one side being somewhat cordate; stipules minute, ciliate, 

 distinct ; involucres solitary ; gland purple, its appendages with 

 a white or rose-colored margin; capsule densely hirsute. (E. 

 polycarpa vestitus Wats.) 



Common in the chaparral belt of the San Gabriel and Santa Ana Moun- 

 tains. 



--*- Leaves serrulate ; margins of glands smaller, greenish-white. 



4. E. serpyllifolia Pers. Glabrous, annual; stems prostrate 

 or ascending, 1-3 dm. long; leaves mostly oblong, of ten narrowed 

 toward the oblique base, serrulate at the rounded or retuse sum- 

 mit, 4-12 mm. long; stipules distinct, setaceous or lacerate; in- 

 volucres solitary or in loose leafy clusters, campanulate, about 

 1 mm. long; glands small, greenish, the margin narrow, crenate 

 or entire; capsule angled, 2 mm. long; seeds sharply 4-angled, 

 the sides somewhat rugose. 



Rather frequent throughout our range in moist places, especially on 

 borders of ponds. 



** Gland destitute of colored margin; stipules none. 



5. E. dictyosperma F. & M. Glabrous, annual; stem simple 

 or sometimes branching below, dichotomously branched above, 

 15-45 cm. high ; stem leaves scattered, oblong-spatulate to obo- 

 vate-spatulate, obtuse, obtusely serrate, often retuse, 1-3 cm. 

 long; on the branches opposite, broadly ovate to oblong, the 

 floral ones roundish-ovate, subcordate, mucronate, 4-12 mm. 

 long; rays usually 3 times forked; involucres and glands small; 

 styles bifid or parted ; capsule with rounded and warty lobes, 

 2-3 mm. long ; seeds subglobose, delicately netted-veined, dark 

 colored . 



Occasional in rather moist places in all our foothills and mountains, con- 

 fined mostly to the chaparral belt. 



6. E. nutans Lag. Annual, glabrous or sparingly pubescent; 

 stems branched, ascending or erect, 2-6 dm. long, branches 

 often recurved at the ends; leaves opposite ; leaves oblong-ovate 

 to linear-oblong, oblique, 3-nerved, unequally serrate, short - 

 petioled; stipules triangular, slightly lacerate; involucres nar- 

 rowly obovoid, 1 mm. long; glands subtended by small rounded 

 reddish appendages; capsule glabrous; seeds oblong-ovoid, 1.5 

 mm. long, 4-angled, transversely rugose. 



This species, heretofore not known west of the Rocky Mountains, has been 

 recently collected near Santa Ana by Helen D. Geis. 



