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 (Pursh) A. Gray. (Aster canescens Pursh) 
On sterile ground 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 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. 1. 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. Leucelene 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). 
