CoivrpGsiTAT!: (composite famiLy') '59^ 



Involucres not glabrous. 



Involucral bracts not setosely barbed. 



Pubescence wholly canescent (in no. 8, sometimes nearly 

 wanting). 



Leiif-blades and their'lobes mostly lanceolate ' . . . 7. C. intermedia. 



Leaf-blades and their lobes mostly linear; . ' '. - ' . S. G. gracilis^ 

 Fubescence canescent with intermingled black hairs. , li • ' i J i 



Bristly hairs glandular . . . . , . . 9.',C. ocoiaeritalis. 



Bristly hairs not glaildular . . ' . ' . 10. C. scppiuloruiri. 



Involucral bracts setosely barbed on the carinate midrib . >' .' 11. G, barbigera; 



1. Crefpis nana Rich. App. Frank. Jburn. ed.; 2. 757: 1823. Forming de- 

 pressed tufts on creeping rootstocks: leaves chiefly radical, obovate to ■ spat u- 

 late, entire, repand-dentate, or lyrate, commonly e'qualing the clustered 

 spapes or stems; heq,ds,in fruit nearly 12 mm. high: ^ghenes liheta', unequally 

 ribbed, obscurely contracted under the moderately dilated pappiferous disk.— ;- 

 Alpine mountain summits in Colorado and California,' thence far northward. 



2.' Crepis ele^ns Hook. PI. Bor. Am- 1: 297. 1834.' Many-stemmed from 

 a taproot, diffusely branched: leaves entire or nearly so; thei radical spat ulate; 

 the ckuline lanceolate to' linejar: heads smaller: Eichenes linear, fusiform, 

 minutely sdabrdus on the equal narrow ribs, attenuate into a short slender 

 beak, which is discoid-dilated it summit. — From Wyoming and Dakbta to 

 the Saskatchewan. , ' i 



3. Crepis gteuca T., & G. FI. 2: 488. 1841. Perennial, scapose or rarely 

 with 1 or 2 leaves on the stem, 2-6 dm. high, glabrous and glaucous through- 

 out:, basal leaves spatulalte, oblanceolate, or obbvate, gradually narrowed 

 into margined petioles, entire, dentate, or pinnatifid, 5-15 cm. long, 1-2 cm. 

 wide: heads not numerous,' Idng-peduncled, 12-25 mln. broad: pfedunciys 

 glabrous: involucre campaiiiilate, the principal bracts lanceolate, acute, the 

 outer ones very short, bviite, appressed: achenes oblong-dylindric, strongly 

 10-ribbed. — In moist saline, soils; west of the Missouri to Nevada. 



4. Crepis runcihata T. & G. 1. c. Perelinial, similar to the preceding 

 species but not glaucous or scarcely sdj' often pubescent below; stem leafless 

 or with 1. of 2 small leayes, 3-9 dm.' high: basal leaves, spatulate, obovate, or 

 obloflg, obtuse br acute, entire, repand, dentate, or rarely runcinate-pinnatifld, 

 5^15 cm. lopg, 2-3 cm. Wide:, heads several, long-peduncled, nearly 25 mm. 

 broad; involucre campariulate, tlxe principal bracts linear-lanceolate, acute, 

 outer ones short, lanceolate, apfpressed': achenes linear-oblong; 10-ribbed. 

 (C. pMy'phylla Greene, Pitt. 3: 27. 1896; C glaucella Rydb. BuU. Torr. Bot. 

 Club 28: 512. ,1901; C. tomentulosa, C. perplexans, and C. petiolata Rydb. 

 fiuU. forr. Bot. Club 32: 134 & 135. 1905, To recognize the foregoing one 

 would first haVe to assiraie a hjrppthetical C. rilrlcinata.) — In wet soils; 

 Utah and Colorado to Washington' and tte Saskatchewan. 



5. Crepis riparia A. Nel'si Bull. Torr. Bot. Club 26: 486. 1899.. Stems 

 1 or more, 2-4 dm. high-,^ sdbscapdse, minutely alnd sparsely pubescent, up- 

 ward becoming clammy Of glandiilaf: radical leaves few, rather large, oblong 

 to elliptic', obtiise to subacute, entire or coai'sely and irregulariy dentate and 

 at ba,se npiore' or less riincihate,' 10-18 cnil long, on petioles of about half the 

 length, glabrous except on |the petioles and niidrib: inflorescence cdrymbose- 

 paniculate; heads 15-20' mih. high, many-flowered; involuijre dark, glandular- 

 pubescent; bracts linear, in 2 rows; the outer few and short; the inner more 

 numerous (12-16): achenes^apering gi;adually from base to summit, about 

 6 mm. long, rather uniformly lO-striate, (iglit brown;' pappus soft and white, 

 shorter than, Ijhe achene.-jyWeli grassy banks at middle elevp.tions; through- 

 out our range, ,,; , , ' • i 



5a. Crepis riparia parva A. Nels. l^ot distinguishable from' the species 

 except by the small si^e, usually solitary heads, and small glabrous leaves. 

 (C. deriticvlata Rydb. I.e.; C.Mpicota.A. Nels. Bot. Gaz. 40: 65. 1905.)— In 

 subalpine .parks; our range, • , . , 



6. Crepis acuminata Nutt. Tr^ns. Apj. Phil. So'q.\7: 437, 1841. Perennial, 

 slender,. 3-8. or ,9 dm. high, cyinosely braiiplied above; he;rbage cinereously 

 puberuleht but the inflorescence nearly glabrous: lower leaves 15-25 cm. 

 long, broadlv lanceolate in outline, piimatifid with narrow spreading or re- 



