202 FABACEAE. 



mountains soutli of Ward, Boulder Co. ; Devil's Causeway ; above Beaver 

 Crcfk ; Lcroux Crock; Twin Lakes; Spiccr. 



14. Trifolium salictorum Greene. Mountains of Colo. — Alt. about 12,000 

 ft. — Carson. 



15. Trifolium Parryi A. Gray. In the mountains of Wyo., Utah and Colo. 

 — Alt. 10,000-13,000 ft. — Twin Lakes ; headwaters of Clear Creek ; Tennes- 

 see Pass, seven miles west of Leadville ; Cameron Pass ; Buena Vista, Chaf- 

 fee Co. ; Marshall Pass ; mountains above Boreas ; Estes Park ; Silver 

 Plume; Gray's Peak; Robinson; Chambers' Lake; Graymont; Leroux 

 Creek; above Beaver Creek; Berthoud Pass. 



16. Trifolium Fendleri Greene. In meadows from Colo, to N. M. and 

 Ariz. ; also in Mex. — Alt. up to 8000 ft. — Wahatoya Creek ; Gunnison ; La 

 Veta; Parlin, Gunnison Co.; Buena Vista; along the Conejos River, north 

 of Antonito; Monte Vista. 



17. Trifolium oxyodon Greene. In meadows from Colo, to Ariz. — Alt. up 

 to 7700 ft. — Gunnison. 



5. MEDICAGO L. Alfalfa, Lucerne, Medic. 



I. Medicago sativa L. Cultivated from Europe and escaped from Me. and 

 Ida. to Va. and Utah. — Alt. 5000-6000 ft. — Colorado Springs ; Ft. Collins ; 

 Boulder. 



6. MELILOTUS Juss. Sweet Clover. 



Corolla white; banner a little longer than the wings. i. M. alba. 



Corolla yellow ; banner about equalling the wings. 2. M. officinalis. 



1. Melilotus alba Desv. In waste places from N. S. and D. C. to Ida. 

 and Nev. Naturalized from Europe; also cultivated. — Alt. 4000-7000 ft. — 

 Cucharas Valley, near La Veta. 



2. Melilotus officinalis (L.) Lam. In waste places from N. S. and La. 

 to Ida. and Colo. Naturalized from Europe; occasionally cultivated for 

 bees.^Alt. 4000-6000 ft. — Ft. Collins ; Boulder. 



7. ANISOLOTUS Bernh. Bird's-foot Treefoil. 



I. Anisolotus Wrightii (A. Gray) Rydb. (Hosackia Wrightii A. Gray) 

 In dry soil from Colo, to N. M. and Ariz. — Alt. 7000-8000 ft. — Dolores; 

 Mancos. 



8. ROBINIA L. Locust-tree. 



I. Robinia neo-mexicana A. Gray. Along streams from Colo, to N. M. 

 and Ariz. — Alt. 4000-7000 ft. — Trinidad; Walsenburg; La Veta; Denver. 



9. PETERIA A. Gray. 



I. Peteria scoparia A. Gray. Drj' regions from Colo, and Utah to N. M. 

 and Ariz. — La Plata Valley (Brandcgee). 



10. GEOPRUMNON Rydb. Buffalo Beans, Ground Plums. 



Corolla yellowish white, with purple-keel ; leaflets oval or obovate. 



I. G. succulentum. 

 Corolla purple ; leaflets oblong to linear. 2. G. crassicarpum. 



