WOOTON AND STANDLEY — FLORA OF NEW MEXICO. 361 



1. Astragalus crassicarpus Nutt. Fraser's Cat. no. 6. 1813. 

 Geoprumnon crasswarpum Rydb. Colo. Agr. Exp. Sta. Bull. 100: 203. 190G. 

 Type locality: "Above the River Platte." 



Range: Manitoba and Montana to Missouri, Texas, and New Mexico. 

 New Mexico: Highest point of the Llano Estacado; near Horse Spring. Upper 

 Sonoran Zone. 



2. Astragalus diphysus A. Gray, Mem. Amer. Acad. n. ser. 4: 34. 1849. 

 Cystium diphysum Rydb. Colo. Agr. Exp. Sta. Bull. 100: 204. 1906. 



Type locality: Plains, around Santa Fe, New Mexico. Type collected by Fend- 

 ler (no. 146). 



Range: Colorado and Utah to Arizona and New Mexico. 



New Mexico: Santa Fe; Albuquerque; Zuni; Salt Lake; Cerrillos; Lemitar. On 

 the hills and higher plains, in the Upper Sonoran Zone. 



3. Astragalus calycosus S. Wats, in King, Geol. Expl. 40th Par. 5: 66. 1871. 

 Type locality: "In the West Humboldt, East Humboldt, and Clover mountains, 



Nevada." 



Range: Nevada and Utah to Arizona and New Mexico. 



New Mexico: Aztec (Baker 409). Mountains and dry hills, in the Upper Sonoran 

 Zone. 



The specimen cited was named by Doctor Greene on the sheet as a new species and 

 does not exactly agree with the other material of A. calycosus, the calyx teeth and the 

 pubescence being noticeably different. The material we have seen is without fruit 

 and we prefer to wait for more complete specimens before accepting it as a new 

 species. 



4. Astragalus nuttallianus DC. Prodr. 2: 289. 1825. 



Hamosa nuttalllana Rydb. Colo. Agr. Exp. Sta. Bull. 100: 204. 1906. 



Type locality: "In planitiebus Amer. Bor. ad Red-river." 



Range : Mountains of Colorado and New Mexico to Arkansas and Texas. 



New Mexico: Farmington; Carrizo Mountains; Lemitar; Florida Mountains; 

 Deming; Mangas Springs; Carrizalillo Mountains; Organ Mountains; Star Peak; 

 mountains west of San Antonio; Roswell. Upper Sonoran Zone. 



Our plant is much more pubescent than the eastern form, which is the ty})ical one, 

 being always at least grayish from the abundant appressed pubescence. 



5. Astragalus mollissimus Torr. Ann. Lye. N. Y. 2: 178. 1828. Loco weed. 

 Astragalus simulans Cockerell, Torreya 2: 154. 1902. 



Type locality: On the Platte, Colorado. 



Range: Wyoming and Nebraska to New Mexico and western Nebraska. 



New Mexico: Las Vegas; Santa Rosa; Gray; Roswell; White Mountains; Siena 

 Grande; Nara Visa. Dry hills and plains, in the Upper Sonoran and Transition zones. 



This is one of the commonest and best known loco weeds. As we have seen it. 

 growing, it is nowhere very common in New Mexico and so does relatively little damage 

 to stock interests. These remarks apply only to this species, not to all loco weeds. 

 The type of A. simulans was collected near Las Vegas by Cockerell. 



6. Astragalus oreophilus Rydb. Bull. Torrey Club 31: 561. 1904. 

 Type locality: Pagosa Springs, Colorado. 



Range: Colorado and northern New Mexico. 



New Mexico: Taos; Pecos; Santa Fe; Tierra Amarilla; Chama. Damp meadows, 



in the Upper Sonoran and Transition zones. 



7. Astragalus yaquianus S. Wats. Proc. Amer. Acad. 23: 270. 1S88. 



Type locality: Moisl banks and gravelly bars of the upper Yaqui River at Guer- 

 rero, Chihuahua. 

 Ranch: Western Texas ami southern New Mexico to Mexico. 



