38 EUPHORBIACEAE 



15. Euphorbia Fendleri Torr. & Gray. Fendler's Spurge. Fig. 3047. 



Euphorbia rupicola Scheele, Linnaea 22: 153. 1849. Not Boiss. 1838. 

 Euphorbia Fendleri Torr. & Gray, Pacif. R. Rep. ed. 2. 2: 175. 1857. 

 Euphorbia Fendleri var. dissimilis Payson, Bot. Gaz. 60: 379. 1915. 

 Chamaesyce Gooddingii Millsp. Field Mus. Bot. Ser. 2:406. 1916. 



Perennial, herbage glabrous; stems several to numerous, decumbent to erect, to 15 cm. 

 long. Leaves 3-9 mm. long, ovate-cordate to ovate-elliptic, entire ; stipules distinct, linear ; cya- 

 thia solitary; involucres 1.25-1.75 mm. in diameter, campanulate to turbinate, glabrous; glands 

 transversely oblong, reddish, 0.75-1.25 mm. long; fifth gland short, linear; sinus very broadly 

 U-shaped, little depressed; appendages white, glabrous, as wide as the gland or narrower, ob- 

 tusely crenate; staminate flowers 25-35; capsule 3-angled, globose, glabrous, 2.25-2.5 mm. long; 

 seeds white, 2-2.25 mm. long, ovate, acute, quadrangular, angles prominent, facets smooth or 

 slightly wrinkled. 



Arid desert hills. Upper Sonoran Zone; Inyo and San Bernardino Counties, California, east to Nebraska 

 and Oklahoma and south to Texas. Type locality: Santa Fe, New Mexico. April-Sept. 



16. Euphorbia albomarginata Torr. & Gray. Rattlesnake Weed. Fig. 3048. 



Euphorbia albomarginata Torr. & Gray, Pacif. R. Rep. ed. 2. 2: 174. 1857. 

 Chamaesyce albomarginata Small, Fl. S.E.U.S. 710, 1333. 1903. 

 Anisophyllum albomarginatum Kl. & Gke. Abh. Akad. Berlin. 1859: S3. 1860. 



Perennial, herbage glabrous ; stems prostrate, 10-30 cm. long. Leaves 3-6 mm. long, orbicular 

 to oblong, entire; stipules united into a glabrous, white, membranous scale; cyathia solitary; 

 involucres 1.5-2 mm. in diameter, open-campanulate to turbinate, glabrous; glands 0.5-1 mm. 

 long, transversely oblong, mostly maroon; fifth gland linear; sinus U-shaped, little depressed; 

 appendages mostly conspicuous, white, glabrous, entire to crenulate ; staminate flowers 15-30; 

 capsule sharply 3-angled, glabrous, ovoid, 1.7-2.3 mm. long; seeds white, 1.2-1.7 mm. long, 

 narrowly oblong, quadrangular, angles rounded, facets smooth. 



Common on dry hill slopes and plains. Lower and Upper Sonoran Zones; rare in southern San Joaquin 

 Valley, but more abundant from Inyo County south to Mojave and Colorado Deserts, cismontane southern Cali- 

 fornia east of Ventura County to Utah and Texas and south to Sonora. Type locality: Rio Pecos, Texas. 

 March-Oct. 



17. Euphorbia Parishii Greene. Parish's Spurge. Fig. 3049. 



Euphorbia Parishii Greene, Bull. Calif. Acad. 2: 56. 1886. 



Chamaesyce Parishii Millsp. in Parish, Cat. PI. Salton Sink 6. 1913. Preprint from Carnegie Inst. Wash. 



Pub. No. 193: 110. 1914. 

 Euphorbia patellifera J. T. Howell, Leaflets West. Bot. 1: 53. 1933. 



Perennial, herbage glabrous; stems mostly prostrate, 15-30 cm. long. Leaves 2-5 mm. long, 

 mostly ovate, inequilateral, entire; stipules ciliate, mostly entire, dorsal distinct, broadly linear, 

 ventral often united, linear; cyathia solitary; involucres glabrous, 1-1.2 rnm. in diameter, turbi- 

 nate ; glands 0.5 mm. in diameter, circular, exappendiculate ; fifth gland linear ; sinus U-shaped, 

 not depressed; staminate flowers 40-50; capsule sharply 3-angled, glabrous, depressed-globose, 

 1.7 mm. long; seeds white, 1.5 mm. long, long-ovate, sharply quadrangular, facets faintly 

 wrinkled. 



Dry desert washes and flats. Lower Sonoran Zone; deserts from Inyo County, south to San Diego County, 

 California, and east to Nevada. Type locality: Warm Springs, Mojave Desert, San Bernardino County, Cali- 

 fornia. March-June. 



18. Euphorbia polycarpa Benth. Golondrina. Fig. 3050. 



Euphorbia polycarpa Benth. Bot. Sulph. 50. 1844. 



Chamacsvce polycarpa Millsp. in Parish, Cat. PI. Salton Sink 6. 1913. Preprint from Carnegie Inst. Wash. 

 Pub. No. 193: 110. 1914. 



Perennial, herbage glabrous to pubescent; stems prostrate to erect. Leaves 3-6 mm. long, 

 ovate to oblong, entire; stipules ciliate, dorsal distinct, linear, ventral united, narrowly deltoid; 

 cyathia solitary; involucres 1-1.5 mm. in diameter, campanulate, glabrous to pubescent; glands 

 maroon, transversely oblong, 0.5-0.7 mm. long ; fifth gland absent ; sinus U-shaped, not depressed ; 

 appendages to 3 times as wide as glands, white, glabrous, entire to crenate; staminate flowers 

 15-32; capsule sharply 3-angled, glabrous to pubescent, globose, 1.1-1.3 mm. long; seeds white 

 to brownish, 1-1.2 mm. long, ovate, acutish, sharply quadrangular, facets smooth or slightly 

 wrinkled. 



Common on dry slopes and plains, Lower and Upper Sonoran Zones; deserts from Inyo County south to 

 Imperial County and along the coast from Ventura County to San Diego, California, south to Lower California 

 and Sonora. Type locality: Magdalena Bay, Lower California. Feb.-Dec. 



Euphorbia polycarpa var. hirtella Boiss. in A. DC. Prod. 15^: 44. 1862. (.Chamaesyce tonsita Millsp. 

 Field Mus. Bot. Ser. 2: 412. 1916.) Herbage with short spreading hair and the appendages no wider than 

 the glands. Common on desert hills and flats, Lower Sonoran Zone; southeastern Mojave Desert and Colorado 

 Desert. California, east to Nevada, south to Lower California and Sonora. Type locality: "California," 

 probably Colorado Desert, California. 



