368 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 Fattersonii 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 (Pursh) A. Gray. (Aster canescens Pursh) 

 On sterile a;round and sandy banks from Sask. and B. C. to Colo. — North 

 Park; Honnold. 



10. Machaeranthera pulverulenta (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 Cafion ; 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 cafions 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. arenosa. 



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. ericoides. 



1. Leticelene arenosa Heller. (Aster ericaefolius tenuis 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). 



