358 CARDUACEAE. 



6. Machaeranthera viscosula Rydb. On plains and mountains of Colo. 

 Veta Pass; South Park; southeast of Jefferson. 



7. Machaeranthera Pattersonii (A. Gray) Greene. (Aster Pattersonii A. 

 Gray) In moist places in the mountains of Colo. Alt. 10,000-14,000 ft. 

 Caribou ; Gray's Peak and vicinity ; Silver Plume ; Berthoud Pass. 



8. Machaeranthera rubricaulis Rydb. On plains, table lands and hills of 

 Colo. Alt. 5000-7000 ft. Platte River; Denver; Colorado Springs; La Veta; 

 mountain above Andrews' ranch ; south of Antonito. 



9. Machaeranthera canescens (Pursli) A. Gray. (Aster canescens Pursh) 

 On sterile ground and sandy banks from Sask. and B. C. to Colo. North 

 Park ; Honnold. 



10. Machaeranthera pulvemlenta (Nutt.) Greene. On dry plains from 

 Mont, to Colo. Gypsum ; North Fork, Larimer Co. 



11. Machaeranthera glabella Greene. In the mountains of Colo. Alt. 7000- 

 10,000 ft. Black Canon; Gunnison ; southeast of Ouray; White River Pla- 

 teau; Parlin; Cerro Summit. 



12. Machaeranthera ramosa A. Nels. In the mountains of Wyo. and Colo. 

 Alt. 8000-9500 ft. Pitkin; Grizzly Creek; Gypsum. 



13. Machaeranthera Selbyi Rydb.' In canons and meadows in Colo. Alt. 

 7500-9500 ft. West of Ouray; Mt. Harvard. 



14. Machaeranthera spectabilis Greene. In the mountains of Colo. Alt. 

 up to 10,000 ft. Marshall Pass; Gypsum. 



15. Machaeranthera cichoriacea Greene. On hills and mountains from Wyo. 

 to N. M. Alt. 4500-7500 ft. Trail Glen; Westcliffe; Ft. Collins; Twin 

 Lakes ; Deer Run. 



16. Machaeranthera Fremontii Rydb. In black soil of river bottoms, Colo. 

 -" Platte Waters." 



30. LEUCELENE Greene. 



Upper leaves strigose, slightly glandular and not conspicuously hispid-ciliate. 

 Lower leaves broadly spatulate ; upper linear-subulate ; branches long and 



slender. i. L. arcnosa. 



Leaves all linear-spatulate ; branches short. 2. L. serotina. 



Upper leaves conspicuously hispid-ciliate, copiously glandular. 



Upper leaves linear-oblanceolate ; the lower spatulate. 3. L. hirtella. 



Upper leaves linear-subulate ; the lower linear or linear-oblanceolate. 



Leaves of the branches 6-12 mm. long. 4. L. alsinoides. 



Leaves of the branches 2-5 mm. long. 5. L. cricoides. 



1. Leucelene arenosa Heller. (Aster ericaefolius tennis A. Gray) On dry 

 hills from Colo, to Tex. and Ariz. ; also Mex Alt. 4000-7000 ft. Cimarron ; 

 Hotchkiss. 



2. Leucelene serotina (Greene) Rydb. On arid hills from Colo, and Utah 

 to Tex. and Ariz. Canon City. 



3. Leucelene hirtella (A. Gray) Rydb. (Aster ericaefolius hirtella A. Gray) 

 On dry hills from Wyo. and Utah to Tex. and Ariz. Arboles ; Leroux Creek ; 

 mountain above Manitou ; Palisades ; Grand Junction. 



4. Leucelene alsinoides Greene. On dry hills from Colo, to Tex. and N. M. 

 Alt. up to 8000 ft. Salida ; Rocky Ford, Otero Co. ; Walsenburg. 



5. Leucelene ericoides (Torr.) Greene. (Aster ericaefolius Rothr.) On 

 dry hills from Colo, to Tex. and N. M. " Colorado " (James). 



