472 Obdbb 70.— composite. 



Ebsox Mt., N. Y. St. 5 to 8' liigh, bearing the hds. in a subsiiuple raceme. Hs. 

 whitish and odorous. Jl., Aug. 



2 N. nanus DC. St. simple, low, smooth; Ivs. on slender petioles, the lowest 

 variously lohed or parted, the others successively deltoid-hastate, ovate and lance- 

 olate ; hds. in small, axUlary and terminal clusters, forming a short, racemous 

 paaiclo; iiivol. greenish-purple, of about 8 scales and 10 — 12 flowers; pappus 

 dingy white. — White Sits., N. H., with No. 1, where we find it with the same 

 sportive character of foliage as appears in other species. Stem 5 — 10' high. 

 Heads with whitish flowers. Aug. (P. alba. /3. nana Bw.) 



3 N. altissimus Hook. St. smooth, slender, straight, paniculate above; Ivs. 

 more or less deeply 3 — 5-clefl;, all petiolate, angular, denticulate and rough-edged, 

 the lobes acuminate; hds. pendulous; invol. of 5 scales and about 5-flowered. — 

 Tall, with cylindric, yehowish, nodding flowers, in woods, Newfoundland to N. 

 Eng. and Ky. Stem 3 — 5f high, bearing a narrow and elongated panicle. Heads 

 in short, axillary and terminal racemes. Aug. 



/}. OVATUS. Caiiline Ivs. nearly all ovate, on slender petioles. 

 7. CORDATUS. Lvs. cordate, on slender petioles. (Prenanthes cordata Willd.) 

 S. deltoIdea. Lvs. deltoid, acuminate, acutely denticulate. (P. deltoidea Ell.) 

 e. DISSEOTUS. Lvs. mostly 3-parted or divided, segments entire or deeply cleft 

 into 2 or 3 narrow lobes. 



4 N. dlbus Hook. Lion's-foot. "White Lettuce. St. smooth and somewhat 

 glaucous, corymbous-paniculato above ; radical lvs. angular-hastate, often more 

 or less deeply lobed ; stem lvs. roundish-ovate, dentate, petioled, the lobes or 

 leaves obtuse ; hds. pendulous; invol. of 8 scales, 9 — 12-flowered; pappus brown. 

 — Moist woods and shades, N. Eng. to Iowa, and Can. to Car. Stem stout, 2 — 4f 

 high, purplish, often deeply so in spots. Leaves very variable, all irregularly 

 toothed. Scales purplish. Fls. a dingy white. Aug. 



/3. SEBPENTAKIA. Radical lvs. palmate-sinuate, those of the stem on long 

 petioles, with the middle segment 3-parted; upper lvs. lanceolate. — Has 

 the reputation of curing the rattlesnake's bite. (Prenanthes serpentaria Ph.) 



5 N. Frdseri DC. St. smooth, corymiously paniculate above; lvs. subseabroue, 

 hastate or deltoid, often pinnately lobed, on winged petioles, the upper ones lance- 

 olate, subsessile ; invol. of about 8 scales, 8 — 12-flowered ; pappus straw-colored. — 

 2f In dry, hard soils. Conn, and Mid. States (rare) to Fla., common. Stem 2 — 4f 

 high. Leaves as variable as in other species, sometimes all being lanceolate, with 

 only irregular indentures instead of lobes. Heads drooping, with purplish scales 

 and cream-colored corollas. It is readily distinguished from N. albus by the more 

 lively color of the pappus. Aug. (P. rubicaulis Ph.) 



6 N. virgatUB DC. Glabrous and glaucous, slender and simple ; lower lvs. sinuaie- 

 pinnatifid, petiolate, middle ones toothed, sessile, upper entire partly clasping, 

 graduaUy reduced to the minute, subulate bracts ; hds. clustered, in a long com- 

 pound, virgate, somewhat secund raceme; invol. with about 8 scales and 10 flow- 

 ers; pappus-straw-colored. — A remarkably slender, wand-like species, in sandy 

 soils, N. J. to Fla. St. 2 to 4f high, racemous half its length. Lvs. gradually 

 simplified from the base upward, as in most of the species. Sept., Oct. 



7 N. raoemoBus Hook. Glabrous, simple, slender; lvs. aU undivided, lower 

 oval-lanceolate, sharply denticulate, petiolate, upper ovate-lanceolate, subclasping, 

 entire ; hds. in nodding fascicles, arranged in a long, interruptedly spicate panicle ; 

 invoL of 8 to 9 scales, with 9 to 1 2 fls. ; pappus straw-color. — N. J., N. "W. States 

 and Can. St. 2 to 4f high. Fls. pale red-purple. 



/?. Lvs. deeply and irregularly pinnalifid, 



8 W. isper Torr. & Gr. St. strict, simple, scabrous; lvs. simple, scabrous-pubes- 

 cent, dentate, lower ones oblong-oval, on margined petioles, upper lance-oblong 

 and lanec-linear, subentire, sessile ; hds. erect, in small fascicles, in a slender, 

 elongated, compound raceme; invol. strongly hirsute, of 7 to 10 scales and with 

 11 to 14 fls.; pappus straw-color. — Dry prairies and barrens, W. States (Dr. 

 Skinner), common. St 2 to 4f high, nearly smooth. Lvs. 3 to 5' long, pubes- ' 

 cent or glabrous. Kae. 1 to 2f long. Fls. ochroleucous. Sept. (N. Illinoensis 

 DC.) 



9 IT. crepidinetis DC. Nearly glabrous ; st tall, stout, corymbously paniculate ; 



