526 coMPOsiTAE (composite" family) 



nearly sessile to long-petioled, blade elliptic to narrowly oblong, 2-5 cm. long 

 {including the petiole), almost glabrous; stem leaves several, broadly ilinear, 

 acuminate, 2-3 cm. long; pubescence similar to that of the stem: headsi large, 

 when fully expanded 3 cm. broad; involucral bracts involved in a dense; dark 

 purpl'e wool. (E. oreocharis Greeile.)^-TSubalpine in moist parks; Colorado 

 and Wyoming. ; 



11. Erigefdn uniflorus L. Sp. PI. 864.' 1753. Stems 3-8 cm. high or more, 

 strictly mohocephalous, few-leaved, often naked and pedunculiform at summit: 

 radical leaves spatulate or oblanceolate, 2-4 cm.' long; cauline lanceolate to 

 linear: involucre usually hirsute as well as lanate, occasionally becoming 

 naked; the linear-acute bracts rather close, or merely the short tips spreading: 

 rays purple or paler, 4-8 mm. long. (E. simplex Greene, FL Fr. 387 j 1897; 

 E. leucotrichus Rydh. 1. c. 28: 23. 1901; E. grandifhru$ Hook., as to Our 

 range.)— Alpibe; from Colorado to the arctic regions. ' ' ' ' >''-' 



12. Erigeron Garrettii A. Nels. Perennial from a short woody somewhat 

 branched anid 'tufted crown: leaves all basal, nearlji or' quite glabrous;) 2-4 'cm. 

 long, Oblanceolate, obtuse or subacute, tapering'to'i short petiole: scape 7-12 

 cm. long; the solitary heads large, 2-^3''cm.' broad; involucre dark green, 

 7-8 mm. high, obscurely hirsutulous as is also .the 'scape; the bracts Unear- 

 subulate: rays 40-50, white, linear-spatulate, the 'ligule 8-10 mm. long: 

 ouier pappus iHinute or wanting. — Reported only from Cottonwood CafSon, 



■Utah. ''- ' ■.:■■■ ■■,;; ■.,: ,„,,,- 



13. Erigeron tenet Gray, Proc. Am. Acad. 16: 91. 1880. Whole plant 

 canescent (alinost silvery) with minute rather soft pubescence; caudex branch- 

 ing,;bearing inany rigid, erect, slender stems 8-12 cm: high, sparingly branched 

 near the summit, the branches monocephalous: radical leaves' thiokish and 

 firm, broadly obovate-spatulate, abruptly acuminate, rather "indistinctly 

 callous-tipped, 12-18 mm. long by 7-10 mm. wide, on slender petioles twice 

 their lengtn; stem leaves few and small; spatulate-lanceolate: hea'ds' rather 

 small; bracts of the involucre narrow-lanceolate, greenish with- sbmeWhat 

 scarious margins: achenes compressed, hirsute: pajJpus simple. (E. Tweedyi 

 Caiby, Bot. Gaz. 13: 17. 1888:)— Rocky dry hillsj from Montana and Wyo- 

 mih'g'to Nevada. . '( • i ■!/.;■. 



14. Erigeron nauseosus (Jones) A. Nels. Bot. Gaz: 37; 270. 1904.- Tufted 

 perennial, J.-2 dm. high, leafy throughou't, the whole plant minutely scabrous 

 and the leaves hispid-ciliate: basal leaves spatulate to obovate, 4-8 cm. long; 

 the upper' similar but gradually smaller;' sessile or almost clasping?'' heads 

 mostly s0litary on the leafy ascending 'sterns; the peduncle proper only 2-3 cm. 

 long, glutinous or viscid, asis also the involucre, and' with a nauseating odor; 

 the bract's somewhat scabrous, abruptly acuminate: rays white or nearly so. 

 — Hot sandy benches at the base of cliffs; mountains of Utah. 



15. Erigeron leiomeris Gray, Syh: Fl. 1: 211. 18S4.' Stems 8-15 cm. high 

 from the somewhat surculose branches of the caudex, smooth and very gla- 

 brous (or some minute hairiness at least on the petioles) : leaves bright green, 

 mainly radical and spatulate, very obtuse (larger 3-4 cm. long, with 'taper- 

 ing base or petiole of at least equal length), 3-10 mm.' wide; ' cauhhe only 

 2 or 3 and smaller: involucre 6-7 mm. high; the bracts' lanceolate and not 

 attenuate, glabrous but pruinose-glandular, brownish'-purple: rays about 

 40,hnear, violet, 6-8 mm. long. {E. spaihulifoUus' Rydh'. I. c. 26:- '545'. 1899.) 

 ■ — In the alpine regions; Wyoming and Colorado to Utah and Nevada. 



16. Erigeron gkindtdosus Porter, Fl. Col. 60. 1874. Caespitose from a 

 stout Caudex, 1-2 dm. high, rigid, granulose-glandular or glandular-scabrous 

 and with, sparse or hispid hairs, especially on the margins of the leaves: leaves 

 thickish, spatulate to Imear-oblanoeolate, 3-8 cm. long: ihead 8-10 mm-, high; 

 involucre glst^dular or viscid 'as well as pubescent: rays 40 or 50, violet or 

 purple, 8-12 mm. long. — ^Middle elevations in the foothills; Wyoming and 

 Colorado;' ' . ': ■ -■ , ,j ,, . ,■ ,, ; , 



17. Erigeron radicatus Hook. Fl. Bor. Am. 2: 17. 1834. Stems slender, 

 'ascending, 5-10 cm. high; more or less tufted on the woody caudex; leaves all 

 spatulate-linear of wider, the broadest only 2-4 mm. wide, hirsute or hir- 



