492 COMPOSITAE (COMPOSITE FAMILY) 



lower dead and falling away at anthesis, narrowly oblanceolate, on short, 

 hispid-ciliate petioles; the upper sessile, oblong or subspatulate, 3-5 cm. long, 

 obtuse or subacute, apiculate: inflorescence crowded, very leafy, densely but 

 finely glandular, the leafy bracts hispid-ciliate on the margins; heads few 

 (3-10), rather large, paniculately corymbose; involucre broadly campanulate, 

 1 cm. high, green, granular-resinous, ciliate-pubescent: rays 20 (more or less), 

 deep yellow or orange-colored, 8-12 mm. long: pappus dingy, the outer series 

 distinct, of short, narrow scabrous-margined scales. Frequent in sandy soil; 

 Wyoming and Colorado to Utah. 



la. Chrysopsis resinolens ciliata A. Nels. 1. c. Leaves lanceolate, acute, 

 nearly glabrous, closely glandular-dotted, conspicuously ciliate-margined as 

 are also the leaf-like bracts. Southern Wyoming. 



16. Chrysopsis resinolens obtusata A. Nels. Rydb. Fl. Col. 340. 1906. 

 Leaves all very obtuse; the upper narrowly obovate and sessile; the lower 

 with narrow margined base: heads large and with oblong or elliptic-ciliate 

 leaf-like bracts. Wyoming and Colorado. 



2. Chrysopsis viscida (Gray) Greene, Erythea 2: 105. 1894. Low, rigid, 

 strongly decumbent, 1-2 dm. high: leaves green, rather obscurely strigose- 

 pubescent but viscid-hirtellous or with viscid points, oblong, obtusish: in- 

 volucre viscidulous: outer pappus distinct, of linear or subulate short scales. 

 Western Wyoming and Colorado through Utah to Arizona. 



3. Chrysopsis arida A. Nels. Rydb. Fl. Col. 340. 1906. From a branched 

 woody caudex, the exposed crowns covered by the persistent stem bases; 

 pubescence a rather short, uniform, scarcely appressed cinereous hirsuteness, 

 partly concealing the minute resinous atoms with which the plant is sprinkled; 

 stems numerous, ascending, 2-3 dm. long, rather slender and brittle, branch- 

 ing only in the inflorescence: leaves numerous, rather small; the lower narrow, 

 tapering into a slender margined petiole, falling away early; the upper sessile, 

 oblanceolate, oblong or even broader, 1-3 cm. long: inflorescence rather leafy 

 but the uppermost leaves becoming small and bract-like: heads several, 

 corymbosely disposed, moderately large; involucral bracts linear, acute, in 

 3-4 rows, shorter than the disk' rays 9-20: outer pappus of short linear 

 scales. On dry plains and hills; Wyoming and Colorado and probably farther 

 westward. 



4. Chrysopsis hirsutissima Greene, Pitt. 4: 153. 1900. Stems 1-2 dm. 

 high, erect and densely leafy, from a ligneous and branched caudex crowning 

 a strong, deep-seated, woody root; whole plant of a silvery whiteness; the stem 

 clothed with a long and rather stiffly hirsute or hispid white-hairiness: the 

 leaves as white with a dense strigose pubescence, their outline oblanceolate, 

 tapering to short slender petioles, or subsessile: heads solitary in the smaller 

 plants, fastigiate-corymbose in the larger; involucre very regularly imbricated, 

 broadly turbinate: rays rather light yellow: achenes densely appressed-silky; 

 outer pappus obvious, indistinctly paleaceous. (C. horrida Rydb. Bull. Torr. 

 Bot. Club 31: 648. 1904; C. asprella Greene, Leaflets 1: 150. 1905.) Dry 

 rocky slopes; Colorado. 



5. Chrysopsis hispida (Hook.) Nutt. Trans. Am. Phil. Soc. 7: 316. 1841. 

 Hispid throughout with uniform spreading hairs; stems erect or if several 

 decumbent at base, branching freely, 2-3 dm. long: leaves oblong-spatulate 

 or oblanceolate, subacute or obtusish at apex; the radical long-petioled : 

 corymb ample: involucral bracts linear, acute: achene obovate-oblong, hairy; 

 outer pappus distinctly paleaceous. (C. floribunda Greene, Pitt. 3: 101. 

 1896.) Said to be widely distributed in the intermountain region. 



6. Chrysopsis Bakeri Greene, 1. c. 4: 153. 1900. Densely tufted, stems 

 slender, 2-3 dm. high, dark red or purplish, equably though somewhat sparsely 

 leafy and the leaves ascending, frequently monocephalous, otherwise with a few 

 leafy and monocephalous branches toward the summit: leaves 2-3 cm. long, 

 cuneately oblanceolate, acute, entire, strigi Hose-pubescent on both faces and 

 with minute, sessile, resinous atoms underneath the pubescence : heads broad 

 and short for the genus, subcampanulate; involucral bracts mostly dark red- 

 dish like the stem, more villous than the stem, hi several series but not very 



