472 Ordee 70.— composite. 



Egsex Mt., N. T. St. 6 to 8' liigli, bearing the hds. in a subsimple raceme. Fk 

 whitish and odorous. Jl., Aug. 



2 N. ndnus DO. St. simple, low, smooth ; Ivs. on slender petioles, the lowest 

 variously lohed or parted, the others successively ddtoid-hasiate, ovate and lance- 

 olate ; hda. in small, axillary and terminal clusters, forming a shorty racemoug 

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

 dingy white. — White Mts., 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. 13. nana Bw.) 



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

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

 the lobes acuminate ; hds. pendulous; invol. of 5 scales akd about 6-flowerA — 

 Tall, with cylindric, yellowish, 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. 



j8. OVATUS. Cauline Ivs. nearly all ovate, on slender petioles. 

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

 6. DELTOiDEA. Lvs. deltoid, acuminate, acutely denticulate. (P. deltoidea Ell.) 

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

 into 2 or 3 narrow lobes. 



4 N. AlbvLS Hook. Lion's-foot. 'WniTB Lettuce. St. smooth and somewhat 

 glaucous, corymbous-paniculate 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 Oar. Stem stout, 2 — if 

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

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



;8. SERPENTAEIA. 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 tho rattlesnake's bite. (Prenanthes serpentaria Ph.) 



5 N. Fraseri DO. St. smooth, corymbously paniculate above ; lvs. suhscabroup, 

 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. — 

 If In dry, hard soils, Oonn. and Mid. States (rare) to Ma., 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 distuiguished from N. albus by the more 

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



6 N. virg^tus DC. Glabrous and glaucous, slender and simple ; lower lvs. sinuate- 

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

 gradually reduced to tho minute, subulate bracts ; hds. clustered, in a long com- 

 pound, virgate, somewhat secund raceme; invol. with about S 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 IT. racemdsus Hook. Glabrous, simple, slender; lvs. all undivided, lower 

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

 entire ; lids, 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. 



j3. Lvs. deeply and irregularly pinnatifld, 



8 N. ^sper Torr. & Gr. Si. strict, simple, scabrous; lvs. simple, scabrous-pubes- 

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

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

 elongated, compound raceme; invol. strongly hirsute, of 1 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' loi^, pubes- 

 cent or glabrous. Eao. 1 to 2f long. Fls. oohroleucous. Sept. (N. Illinoensis 

 DC.) 



9 N. crepidineus DO. Nearly glabrous ; st tall, stout, corymbously paniculate ; 



