400 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



10. Chamaesyce chaetocalyx (Boiss.) Woot. & Standi. Contr. U. S. Nat. Herb. 

 16: 144. 1913. 



Euphorbia fendleri chaetocalyx Boiss. in DC. Prodr. 15^: 39. 1862. 



Type locality: "In Novo-Mexico." Type collected by Wright (no. 1847). 



Range: Western Texas to Arizona. 



New Mexico: Canyoncito; Los Lunas; Albuquerque; San Augustine Plains; 

 Kingston; Organ Mountains; Tortugas Mountain; White Mountains; Queen. Dry 

 mesas and hills, in the Lower Sonoran Zone. 



11. Chamaesyce serpens (H. B. K.) Small, Fl. Southeast. U. S. 709. 1903. 

 Euphorbia serpens H. B. K. Nov. Gen. & Sp. 2: 52. 1817. 



Type locality: "Crescit in umbrosis Cumanae prope Borcones et Punta Araya," 

 Venzuela. 



Range: Iowa to New Mexico, western Texas, and Mexico. 



New Mexico: South of Roswell; Carlsbad; mesd. west of Organ Mountains. Plains 

 and mesas, in the Lower Sonoran Zone. ' 



12. Chamaesyce geyeri (Engelm.) Small, Fl. Southeast. U. S. 709. 1903. 

 Euphorbia geyeri Engelm. Bost. Joum. Nat. Hist. 6: 260. 1845. 



Type locality: "Beardstown, Illinois, and Upper Missouri." 

 Range: Minnesota and Illinois to Oklahoma and New Mexico. 

 New Mexico: Zuni; Estancia; Pecos. Dry plains and hills, in the Upper Sonoran 

 Zone. 



13. Cham.aesyce micromera (Boiss.) Woot. & Standi. Contr. U. S. Nat. Herb. 16: 

 144. 1913. 



Euphorbia micromera Boiss. in DC. Prodr. 15-: 44. 1862. 



Type locality: Sonora. 



Range: New Mexico and Arizona and adjacent Mexico. 



New Mexico: Mesa west of Organ Mountains. Mesas, in the Lower Sonoran Zone. 



14. Chamaesyce revoluta (Engelm.) Small, Fl. Southeast. U. S. 711. 1903. 

 Euphorbia revoluta Engelm. in Torr. U. S. & Mex. Bound. Bot. 186. 1859. 

 TiTE locality: Gravelly hills near Rock Creek, western Texas. 



Range: Western Texas to Arizona, south into Mexico. 



New Mexico: Mesa west of Organ Mountains; Gray; Hillsboro; Mangas Springs. 

 Mesas and dry hills, in the Lower Sonoran Zone. 



15. Cham.aesyce petaloidea (Engehn.) Small, Fl. Southeast. U. S. 711. 1903. 

 Euphorbia petaloidea Engelm. in Torr. U. S. & Mex. Bound. Bot. 185. 1859. 

 Type locality: Not stated. 



Range: Wyoming and Idaho to New Mexico and Texas. 



New Mexico: San Juan Valley; lower Pecos Valley. Dry hills, in the Upper and 

 Lower Sonoran zones. 



16. Chamaesyce flageUiformis (Engelm.) Rydb. Colo. Agr. Exp. Sta. Bull. 100: 

 223. 1906. 



Euphorbia petaloidea flageUiformis Engelm. in Torr. U. S. & Mex. Bound. Bot. 185. 



1859. 

 Euphorbia flageUiformis Engelm.; T. S. Brandeg. Bull. U. S. Geol. Geogr. Surv. 



Terr. 2: 243. 1876. 

 Type locality: New Mexico. 

 Range: Colorado to Texas and New Mexico. 



New Mexico: Sabinal; Lava; Mesilla Valley; south of Melrose; Farmington. Dry 

 hills and plains, in the Lower and Upper Sonoran zones. 



17. Chamaesyce glyptosperma (Engelm.) Small, Fl. Southeast. U. S. 712. 1903. 

 Euphorbia glyptosperma Engelm. in Torr. U. S. & Mex. Bound. Bot. 187. 1859. 

 Type locality: On the Rio Grande, Texas. 



