COMl'OSITiE. (composite FAMILY.) 277 



1. T. CUSpid^tum, Pursh. Leaves lanceolate, elongated, tapering to a 

 sharp i)oint, W(«>!!y on i!ic margins; scales of tlu; involncre lanceolate, sharp- 

 poiriti'il. — rniirics, AViscousin, X. Illinois, and westward. April, May. 



77. HIERACIUM, Tourn. II.vwkwkkd. 



Heads 12-nuiny-flowcred. Involucre more or less imhricated. Aclicnia 

 short, oblong or columnar, striate, not beaked. I'appus a single row of tawny 

 and fragile capillary rough bristles. — I'crennial herbs, with entire or toothed 

 leaves, and single or paniclcd heads of mostly yellow llowers ; in summer und 

 early autumn. (Name from te/Ja|, a hawL:) 



* Heads larrjc (ind hrowt : involucre imbricated: achenia tapering towards the base. 



1. H. Canaddnse, Michx. (Canada IIawkweku.) Stems simple, 

 le;ify, corymbed at the summit (l°-3° high) ; leaves sessile, lanceolate or ovate- 

 oblong, acute, remotely and very coarsely toothed, somewhat hairy, the upper- 

 most slightly clasping. — Dry woods, northward. 



* * Heads small : involucre ci/lindrical, scarctli/ imbricated. 



2. H. sckbrum, Michx. (Rough II.) Stem rather stout (I°- 3° high), 

 leafy, rou(jh-haiiij ; the still" panicle at first racemose, at length rather corymbose; 

 the thickish jK'duncles and the hoary 40-50-flowered involucre densely clothed 

 M'ith dark glandular bristles ; uc/itniu columnar, not tujierimj at the summit ; leaves 

 obovate or oval, nearly entire, hairy. — Dry open woods; common. 



3. H. longipilum, Torr. (Long-Beaudkd H.) Stem wand-like, sim- 

 ple, stout (2° -3° high), ivry Icafij towards the Imse, nalced above, and bearing a 

 small racemed panicle ; the lower portion and both sides of the oblong-lanceo- 

 late or sjiatulatc entire leaves thickly clothed with very lomj and u]>ri<jht bristUs 

 (often I' long) ; peduncles and 20 -30-flowered involucre glandular-bristly ; ache- 

 nia spindle-shajied, narrowed at the apex. — Prairies, Aliehigan to Wisconsin and 

 soutlnve-'tward. — Heads intermediate betw'een the last and the next. 



4. H. Gron6vii, L. (IIaiky H.) Stem wand-like, mostly simple, /co/y 

 and vei-if hainj below, naked above and forming a long.and narrow j)anicle ; leaves 

 oblong or obovate, nearly entire, hairy ; the slender peduncles and the 20 -30- 

 flowered involucre sparingly glandular-bristly ; achtnia spindle shaped, with a 

 i-erij tufjcr summit. — Dry sterile soil : common, especially southward. — Varies 

 from 10-4° high. The small heads and almost beaked fruit distinguish the 

 largest forms from No. 2, and small naked-stemmed states from the next. 



5. H. ven6sum, L. (Hattmcsnake-weed.) Stem or scape {\°-'2° 

 high) naked or with a single leaf, smooth and slender, fork inrj above into a spreadiw/ 

 loose cori/mb ; root-leaves obovate or oblong, nearly entire, scarcely pctioled, thin 

 and pale, pnri)lish and glaucous underneath (often hairy along the midrib), 

 marked al)()ve with ])nr])le veins ; peduncles very slender; involucre 20-flowered ; 

 achenia linrar, not t;ipcring upwards. — Var. srnc.vn.ESCKNS has the stem 

 mure or less leafy next the base. — Dry jilains and pine woods: common. 



6. H. panicul^tum, L. (Panki.ed H.) Stem slender, leafy, dijfnselif 

 branched, hairy below (2° -3° hi>:h); leaves lanceolate, acute at both ends, 

 slightly toothed, smooth; /leadi in a loose panicle (very small), ou slender and 



