368 
CARDUACEAE. 
Leaves of the stolons narrowly oblanceolate, 1.5-5 cm. long; bracts 
with dark spots. 7. A. nardina. 
Leaves of the stolons spatulate, 0.5-3 cm. long; bracts not with dark 
spots. 
Leaves of the stolons 5-15 mm. long, rhombic-spatulate; tomen- 
tum very fine, appressed and silky. 8. A. microphylla. 
Leaves of the stolons spatulate, usually rounded at the apex, 
15-30 mm. long; tomentum looser. 
Bracts of the pistillate heads obtuse; plant 1--2 dm. high. 
9. A. viscidula. 
Bracts of the pistillate heads acute. 
Inflorescence and upper leaves glanduiar-hairy; leaves of the 
inflorescence large, scarcely smaller than the upper stem- 
leaves; bracts greenish. 10. A. bracteosa. 
Inflorescence and upper leaves not glandular; the latter re¬ 
duced; bracts brownish. 11. A. oxyphylla. 
Heads 8-12 mm. high. 
Leaves tomentose on both sides. 
Plant tall, 2-3 dm. high ; heads usually peduncled. 
Leaves less than 2 cm. long and 5-8 mm. wide, usually not triple- 
nerved ; heads 7-9 mm. high. 11. A. oxyphylla. 
Leaves over 2 cm. long, 7-10 mm. wide, triple-nerved; heads 
about 1 cm. high. 12. A. obovata. 
Plant low, usually less than 1 dm. high ; heads subsessile. 
13. A. aprica. 
Leaves glabrous above. 14. A. marginata. 
Plant acaulescent; heads subsessile among the rosettes of the basal leaves. 
Bracts with white upper portion; leaves white on both sides. 
15. A. rosulata. 
Bracts with brown upper portion; leaves glabrate above. 
16 . A. Sierrae-Blancae. 
Plants not surculose-proliferous. 
Heads 4-5 mm. high; bracts nearly glabrous, scarious throughout; leaves 
silky-tomentose. 17. A. oblanceolata. 
Heads 6-10 mm. high; bracts tomentose at the base; only tips scarious; 
leaves villous-tomentose. 
Bracts with a large dark spot; those of the pistillate heads ovate to lan¬ 
ceolate, acute; those of the staminate heads ovate or oval, obtuse or 
acutish; pistillate heads about 8-10 mm. high, turbinate at the base. 
18. A. pulcherrima. . 
Bracts with small dark spots or none; bracts of both staminate and pis¬ 
tillate heads with oblong or oval, obtuse tips; those of the staminate 
heads slightly broader. 19. A. anaphaloides. 
Pappus-bristles of the staminate heads not clavate; achenes puberulent; hairs 
bifurcate at the apex; plant low and densely cespitose. 20. A. dimorpha. 
1. Antennaria media Greene. On the higher peaks from Mont, and B. C. 
to Colo, and Calif.—Alt. 10,000-13,000 ft.—Massif de l’Arapahoe; Little Kate 
Basin, La Plata Mountains; Alpine Tunnel; West Spanish Peak; near Pagosa 
Peak; Bottomless Pit; Silver Plume; mountain southeast of Cameron Pass. 
2. Antennaria umbrinella Rydb. On the higher mountains from Mont, and 
Ida. to Colo.—Alt. 7500-13,000 ft.—Ruxton Dell; Alpine Tunnel; Sierra 
Blanca; Little Kate Basin; divide road to Steamboat Springs; Gunnison; 
Ironton, San Juan Co.; Berthoud Pass. 
3. Antennaria flavescens Rydb. On dry hills from Mont, and Wash, to 
Colo.—Alt. up to 10,500 ft.—Hahn’s Peak; Spicer. 
4. Antennaria concinna E. Nels. On mountain ridges of Colo, and Utah.— 
Alt. about 9000 ft.—Palsgrove Canon. 
