534 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



1. Stillingia spinulosa Torr. in Emory, Mil. Reconn. 151. 1848. 



Stillingia ? annua (Torr.) Muell. Arg. in DC, Prodr. 15 2 : 1160 

 1866. 



Southwestern Yuma County, 140 to 1,300 feet, sandy deserts. 

 Southern Nevada to southwestern Arizona and southeastern Cali- 

 fornia. 



2. Stillingia paucidentata S. Wats., Amer. Acad. Arts and Sci. Proc. 



14: 298. 1879. 



Stillingia linearifolia S. Wats. var. paucidentata Jepson, Man 

 Fl. PI. Calif. 598. 1925. 



Known in Arizona only from the type collection, "Colorado Valley, 

 near mouth of Williams River" (Palmer 517 in 1876). Western 

 Arizona and southeastern California. 



3. Stillingia linearifolia S. Wats., Amer. Acad. Arts and Sci. Proc. 14: 



297. 1879. 

 Yucca (Mohave County), about 1,900 feet. Western Arizona, 

 southern California, and Baja California. 



13. SAPIUM 



Shrub or small tree with milky sap; leaves alternate, coriaceous, 

 serrulate; stipules triangular, oblique; staminate flowers borne in 

 terminal spikes, the calyx 2-lobed, the stamens 2, the filaments 

 shortly united; pistillate flowers 1 or 2 at base of the spikes, or 

 axillary; seeds not carunculate, subspheroidal, large. 



1. Sapium biloculare (S. Wats.) Pax, Pflanzenreich IV. 147 5 : 153, 221. 

 1912. 



Sebastiana (?) bilocularis S. Wats., Amer. Acad. Arts and Sci. 

 Proc. 20: 374. 1885. 



Near Gila Bend (southwestern Maricopa County), western Pima 

 County, 800 to 2,000 feet, sandy washes, locally abundant. South- 

 western Arizona, Sonora, and Baja California. 



The plant attains a height of 4.5 m. (15 feet) in Arizona. According 

 to Pringle it was called "yerba-de-fleche" and was used by the Apaches 

 to poison their arrows. The juice is reputedly very poisonous and 

 causes sore eyes when introduced in the smoke of burning wood. The 

 natives of Mexico are said to have used the juice to stupefy fish. The 

 seeds often are infested with larvae of a small moth, which cause them 

 to move about, roll over, or even jump a little, like the famous Mexican 

 jumping beans obtained from Sebastiana pavoniana Muell. Arg. 



14. EUPHORBIAS Spurge 



Annual or perennial herbs; leaves simple, alternate, opposite, or 

 whorled; flowers monoecious, borne in cyathia simulating simple 

 flowers; pistillate flower solitary in the center of the cyathium, pedi- 



79 References: Norton, J. B. S. north American species of euphorbia section tithymaltts. 60 pp., 

 pi. 11-52. 1899. (Preprint from Mo. Bot. Gard. Ann. Rpt. 11: 85-144. 1900.) 

 Wheeler, L. C. revision of the euphorbia polycarpa group of the southwestern 

 united states and adjacent Mexico. Torrey Bot. Club Bui. 63: 397-416, 429-450. 

 1936. 



EUPHORBIA SUBGENUS CHAMAESYCE IN CANADA AND THE UNITED STATES EXCLUSIVE 



OF SOUTHERN FLORIDA. Rhodora 43: 97-154, 168-205, 223-286. 1941. 



