496 MISC. PUBLICATION" 423, IT. S. DEPT. OF AGRICULTURE 



The Arizona form probably is D. wislizeni Engelm. The species is 

 known otherwise only from Mexico. 



5. Desmodium psilocarpum A. Gray, PL Wright. 2: 48. 1853. 



Meibomia psilocarpa Kuntze, Rev. Gen. PL 1: 198. 1891. 



Near Nogales (Santa Cruz County) , Baboquivari Mountains (Pima 

 County), about 4,000 feet, type from near Santa Cruz, Sonora (Wright 

 1016). Southern Arizona and northern Mexico. 



6. Desmodium rosei Schubert, Gray Herbarium Contrib. 129: 22. 



1940. 



Desmodium neomexicanum of authors. Not of Gray. 



Navajo and Coconino Counties to Cochise, Santa Cruz, and Pima 

 Counties, 3,500 to 6,000 feet, common on slopes and mesas, often in 

 grassland, August and September. New Mexico, Arizona, and north- 

 ern Mexico. 



7. Desmodium scopulorum S. Wats., Amer. Acad. Arts and Sci. Proc. 



24: 47. 1889. 



Meibomia scopulorum Rose and Standi., Contrib. U. S. Natl. 



Herbarium 16: 212. 1913. 

 Desmodium wigginsii Schubert, Gray Herbarium Contrib. 



129: 25. 1940. 



Baboquivari Mountains, Pima County (Jones 24903, 24904 part), 

 September. Southern Arizona and northern Sonora. 



8. Desmodium neomexicanum A. Gray, PL Wright. 1: 53. 1852. 



Desmodium bigelovii A. Gray, ibid. 2: 47. 1853. 

 Meibomia parva Schindler, Repert. Spec. No varum RegniVeg. 

 20: 153. 1924. 



Yavapai, Gila, and Greenlee Counties, to Cochise, Santa Cruz, 

 and Pima Counties, 3,500 to 6,000 feet, grassy slopes and mesas, 

 very common, August and September, type of Desmodium bigelovii 

 from along the San Pedro River, Cochise County (Wright 1012), type 

 of Meibomia parva from Paradise, Cochise County (Blumer 1675). 

 Western Texas to Arizona and Mexico; South America. 



A form collected in Sycamore Canyon near Ruby, Santa Cruz 

 County (Kearney and Peebles 14466), has some of the upper leaves, as 

 well as the basal ones, unifoliolate. It resembles the type of Desmo- 

 dium annuum Gray, collected "on the Sonoita," probably in south- 

 western Cochise County (Wright 1009a), except that the latter has 

 all of the leaves unifoliolate. 



9. Desmodium procumbens (Mill.) A. S. Hitchc, Mo. Bot. Gard. 



Ann. Rpt. 4: 76. 1893. 



Hedysarum procumbens Mill., Gard. Diet. ed. 8, No. 10. 1768. 



Greenlee, Cochise, Santa Cruz, and Pima Counties, 3,500 to 5,000 

 feet, not common, August and September. Southern Arizona to 

 South America. 



The Arizona form is var. exiguum (A. Gray) Schubert (D. exiguum 

 A. Gray), the type of which was collected "in mountain ravines on 

 the Sonoita" (Wright 1010), probably in southwestern Cochise County. 



