3. S. Fendleri. 



, 9QMPOSITAE (coMPOsiTB? family) 595 



Involucre imbricated,. (. e., the bracts in 2 or more successively 



' shbrter seriies; leaves numerous. ', l 1 . . . 



Leaves ihsually subeatire and. narrowly lanceolate .4 . 1, H, umbeUatum, 

 Leaves usually broadly lanceolate or ovat^pblong, ,ali(^ acutely 



dentate . ,., , . . . , . ' . .' . .2. H. canadense. 



Involucre not regulatly- imbricated, a series of equal ' bracts and 



some short calydulate ones; leaves relatively few> 

 , Achenes tapering from base tp sup^mi^, , , . , . 



Achenes cyfindrical. ' ' 

 ■ ■ ' ' Flowers white or ochrbleucous , \ .' ■ . . 4, H. albiflorum, 



: : 1 c Flowers yellow. 



\ Heads small, black-hairy 6. H. gracile. 



Heads large, white-hairy or glabrate. 

 ■' '*' '^ Leaves densely long-hirsute' ,' . . , ■ . , 6.' H, Scouleri, 



''•_■ Leaves nearly smooth ■.•■ li, ; .' . , , . . 7, H. cynoglossqides. 



1. Hieracium umbellatum L. Sp. PI. 804. 1753. Stems 3-6 dm. high, 

 strict, bearing a few somewhat umb^ll^tely,4i^os^fi heads: leaves narrowly 

 or sometimes broadly lanceolate, nearly entire, sparsely denticulate, occa- 



teiojiially laciniate-dentate, all narrow at base: involucre Xisjially livid, gla- 

 brous or nearly so; outermost bracts loose or .spreading. (H, columbianum 

 Rydb, Bull. Torr. Bot. Club 28: i513. 1901.)-r-Across the continent through 



■the northern part ofi our range. ' 1 ! 1 



2. Hieracium ' canadense > Michx. Fl, 2: 86. 1803. Taller, robust, with 

 cormybosely or paniculately cymose heads: leaves lanceolate to ovate-oblong, 

 acute, sparsely and acutely dentate or even laciniate, at least the upper partly 

 clasping anci broad or broadish at base: involt^Cte usually pubescent when 

 young, becoming glabrate, occasionally glandular;, ttenarrow outermost bracts 

 loose: pappus sordid.. — Across the continent through the northern part of 

 our farige, and far northward'.' '" ' 



3. Hieracium Fendleri Schultze Bip. Bonplandia 9: 173. 1861, , Sub- 

 scapose, not rarely 1 or 2 leaves toward base of the simple or paniculately 

 branching s^em, sparsely setose-hirsute: radical leaves spatulate or brpader; 

 the cauline verging tp lanceolate, reduced above to linear bracts: heads few 

 and raeemiform-paniculate, or more numerous and corymbosely disposed: in- 

 v.olucre puberulgnt or glabrate, with or without scattered setose hairs : aphenes 

 Capering froin near ihe base to summit, sometimes reddish, at length commdnly 

 blackish: pappus copious, soft, sordid-whitish.^ — Colorado and New Mexico. 

 "4, Hieracium albiflorum Hook. Fl.' Bor. Aiia. 1 : 298. 1834. Stems 5-9 dm. 

 high, leaf y below, nearly naked ajioye, ending in a panicle of white-fiowered 

 heads; herbage thickly beset belo^^with tawny bristly hairs, glabrous above 

 except for a minute glandular .pubescence aA,d sometimes a few .'soft hairs on 

 the inflorescence: lower leaves oblong, narrowed at base to a winged' petiole, 

 10-15 Cm. lon^, 2-4 cniii broa^, entire to saUently repand-dentate; upper leaves 

 oblancebla,te to linear, thos^ of thfe inflorescence linear-attenuate: pappus dull 

 white,^ — In open coniferous woods, in the mountains; ourrafage and westward. 



6. Hieracium gracile HoqIc. 1. c. , Pale green, in tufts: leav'es nearly all in 

 radical clusters, Qbpvate- tp qblong-spatulate and' attenuate into petioles, 

 entire sor repand-denticvlate: stems or scapes slender, 2-4 dm. high, cinereous 

 above, bearing few or several racemosely disposed livid heads, the lower 

 ,}iijear-bracteate; jnyolucre usually blackish-hairy at base: achenes sHbit- 

 pomirihar. — Mountains df Colorado, Utah, and northward. 

 I '5c?,- Hieracivun gracile detoijsum Gray, A reduced form with most of the 

 dark'liairs wanting, epccep't a te\|r'on the involucre. — High mountains; West- 

 em part of our range'. 



56, Hierapium.^p^cile ^minimum A. Nels. A dwarf a,lpine form, sometimes 

 but a few cm. high arid with, a solitary head. T-In the higher mountains. 



6. Hieracium Scouleri Hqiok. 1, c. Strikingly pube'scent with long crisp 

 Liairs, pale E^nd more or less glaucescent; stems 3-7 dm. high, very leafy: 

 Ipayes .lanceolate, sessile or the, lowest short-petioled, 5-15 cm. long: heads 

 ratiier few, in a loose irregular 'panicle; involucre 12 mm. high; the bracts 

 linear-lanceolate, often acuminate^ imbricated in 2 or 3 series, the outer 

 successively, shorter, all beset with long, bristly' hairs, and more or less glan- 

 dular: pappus wliitish. — Coming into our. range from the north 'Pacifio States. 



