COMPOSITAE (COMPOSITE FAMILY) 493 



regularly imbricated: rays deep golden-yellow approaching orange: achenes 

 silky; outer pappus obvious, whiter than the inner but setaceous rather than 

 paleaceous. (C. pedunculata Greene, 1. c. 154; C. incana Greene; C. compacta 

 Greene, Leaflets 1: 151. 1905.) Colorado; probably more widely distributed. 



7. Chrysopsis villosa Nutt. Hook. Fl. Bor. Am. 2: 22. 1834. Appressed- 

 strigose pubescent; stem erect or ascending, simple or corymbose: leaves 

 canescently strigose, ascending, usually cuneately narrowed below, entire or 

 nearly so, mucronate; the upper linear-oblong or lanceolate; the lower oblong- 



rtulate: heads solitary to corymbose at the ends of the branches, on 

 rt peduncles; bracts of the campanulate involucre linear-subulate, strigose- 

 pubescent: achene villous; outer pappus setose-squamellate. From Colorado 

 to the Canadian provinces. 



8. Chrysopsis pumila Greene, Erythea 2: 95. 1894. Whitened with soft, 

 loose, villous pubescence throughout; stems low, spreading, more or less de- 

 cumbent at base, 10-15 cm. high: leaves narrowly oblanceolate, tapering into 

 a margined petiole-like base, 2-5 cm. long, middle and upper stem leaves 

 usually longer than the basal which are early deciduous: heads solitary or 

 terminal and axillary; terminal head large, 12-14 mm. high and considerably 

 broader, subtended by some foliar bracts which are long-ciliate on the mar- 

 gins; axillary heads reduced, rarely more than the 2 or 3 uppermost develop- 

 ing: rays 15-25, orange-yellow; ligule 12-15 mm. long; disk-corollas numer- 

 ous, with very slender tube which is shorter than the narrowly tubular throat: 

 pappus dingy, equaling the corolla; achene short-linear, minutely silky- 

 pubescent. (C. alpicola Rydb. 1. c. 649. 1904; C. Cooperi A. Nels. Bot. Gaz. 

 40: 63. 1905.) Alpine in the high mountains of Colorado. 



9. Chrysopsis depressa Rydb. Mem. N. Y. Bot. Card. 1: 381. 1900. In- 

 tricately branched, from a woody caudex; stems 7-15 cm. high, densely short- 

 pilose, very leafy: leaves 7-14 mm. long, obpvate-elliptic or spatulate, on 

 very short petioles, divaricate, densely grayish-strigose : heads on naked 

 peduncles about 1 cm. long, small, 7-10 mm. high; bracts linear, acute, puber- 

 ulent, in about 3 rows, one third shorter than the disk: achenes silky-strigose. 

 Frequent on the Geyser formations in Yellowstone Park. 



10. Chrysopsis fulcrata Greene, Bull. Torr. Bot. Club 25: 119. 1898. 

 Tufted, the stoutish erect stems 4-8 dm. high, the herbage green, papillose- 

 glandular and perhaps somewhat viscid beneath a minute strigose pubescence, 

 some rather stiffly hirsute, longer hairs clothing the stems and leaf-margins: 

 leaves oblong, obtuse, sessile, ascending, about 3-4 cm. long, venulose: heads 

 rather large, short-peduncled, subcorymbose at summit of stem and branches; 

 the involucres subtended and partly concealed by one or more leafy bracts; 

 proper involucral bracts in few series: rays numerous and large, golden- 

 yellow: achenes silky; outer pappus very conspicuous, of 20-25 linear- 

 acuminate scales. (C. caudata Rydb. Bull. Torr. Bot. Club 31: 648. 1904.) 

 In the mountains of Xe\v .Mexico and Colorado. 



11. Chrysopsis foliosa Nutt. Trans. Am. Phil. Soc. 7: 316. 1840. Stoutish, 

 usually freely branched, 3-5 dm. high; pubescence canescently silky and with 

 a thinner coat of long villous hairs: lower leaves spatulate, obtuse or slightly 

 mucronate, middle and upper leaves broadly oblong or elliptic; the upper 

 cordate or truncate at the base, 3^ cm. long: inflorescence corymbiform; 

 heads usually subtended by oblong leaves; bracts hirsute-strigose, linear- 

 lanceolate, acute: disk 15 mm. or more wide; rays golden-yellow, about 12 mm. 

 long: achenes densely strigose-canescent. Common at middle elevations in 

 the central Rocky Mountains. 



lla. Chrysopsis foliosa amplifolia (Rydb.) A. Nels. Leaves numerous and 

 large, the upper cordate or truncate at base. (C. amplifolia Rydb. 1. c.) 

 Colorado. 



116. Chrysopsis foliosa imbricata A. Nels. Leaves short and crowded on 

 the nearly simple stems, canescent or grayish with a dense appressed pubes- 

 cence. (C. imbricata A. Nels. Bot. Gaz. 37: 263. 1904.) Central Colorado 

 on the mountain slopes. 



12. Chrysopsis mollis Nutt. 1. c. Resembling the preceding but the pu- 



