CARDUACEAE. 
347 
Inflorescence narrow, scarcely secund; bracts linear-lanceolate. 
10. 6". missouriensis. 
Inflorescence usually open and more or less secund; bracts oblong-lanceolate. 
11. 5 '. glaberrima. 
Heads 6-7 mm. high; stem stout. 12. S. concinna. 
V. Serotinae. 
Leaves green, sparingly pubescent or glabrous; pubescence scabrous, mostly 
confined to the margins and the veins. 
Stem usually glabrous up to the inflorescence; heads 5 mm. high or more ; 
leaves glabrous except on the margins and on the mid-veins. 
13. S. Pitcheri. 
Stem more or less pubescent. 
Heads 5 mm. or more high; leaves pubescent; plant stout. 
14. S. polyphylla. 
Heads about 4 mm. high; plant comparatively slender. 
Leaves pubescent at least on the veins. 15. S', canadensis. 
Leaves glabrous, except the scabrous-ciliolate margins. 
16. S. serra. 
Leaves densely canescent, especially beneath. 
Leaves usually broadly lanceolate, scabrous above. 17. S. scabriuscula. 
Leaves linear-lanceolate, finely and rather softly canescent on both sides, more 
or less yellowish-gray. 18. .S', gilvocanescens. 
VII. Incanae. 
Plants low, 1-2 dm. high ; inflorescence corymbiform ; branches not secund. 
19. S. nana. 
Plants tall, 2-6 dm. high ; inflorescence narrow, or if open with distinctly secund 
branches. 
Bracts oblong of linear, obtuse ; stem-leaves scarcely triple-veined; inflorescence 
usually narrow. 
Stem-leaves oblanceolate. 20. S. pulcherrima. 
Stem-leaves spatulate or elliptic. 21. 5 '. radulina. 
Bracts lanceolate or ovate, acute; stem-leaves distinctly triple-veined; in¬ 
florescence usually more open. 
Stem-leaves oblanceolate or elliptic; bracts lanceolate. 
22. S. trinervata. 
Stem-leaves obovate, thick; bracts ovate. 23. S. mollis. 
1. Solidago scopulorum (A. Gray) A. Nels. (S. multiradiata scopulorum 
A. Gray) On hills and mountains from Alb. and B. C. to Colo, and Utah. 
■—Alt. 8000-10,000 ft.—Bard Creek, near Empire; Lake City; Grizzly Creek; 
White River Plateau; Robinson; Mt. Harvard; Big South; Gore Pass. 
2. Solidago ciliosa Greene. In the higher mountains from Alb. to Colo, 
and Ariz.—Alt. up to 13,000 ft.—Ironton, San Juan Co.; Seven Lakes; Gray’s 
Peak. 
3. Solidago rubra Rydb. In the mountains of Colo.—North Park; Grizzly 
Creek, Larimer Co. 
4. Solidago laevicaulis Rydb. In the mountains of Colo, and Wyo.—Alt. 
up to 11,000 ft.—North Park; Berthoud Pass. 
5. Solidago decumbens Greene. (S. humilis nana A. Gray) On the higher 
mountains of Wyo. and Colo.—Alt. 10,000-13,000 ft.—Gray’s Peak; near Em¬ 
pire ; Mt. Harvard; Mt. Garfield; near Pagosa Peak; Bottomless Pit; Cam¬ 
eron Pass; Berthoud Pass. 
6. Solidago oreophila Rydb. (S. humilis A. Gray, in part; S. humilis Pat- 
tersonii Gandoger) In the mountains from Mackenzie to Colo.—Alt. 7000- 
11,000 ft.—Clear Creek; near Empire; near Pagosa Peak; Minnehaha; Estes 
