LXXV. COMPOSITE. 36t 



copious, capillary, brownish, 2-rowed ; persistent ; achenia not beaked, 

 smooth, striate. Erect herbs, with a thick, tuberous, bitter root. Hds 

 5 18-Jtowered, not yellow, although often straw-colored. 



Heads pendulous, glabrous. Leaves very variable in the same species. 



1. N. ALBUS. Hook. (Harpalyce. Don. Prenanthes. Linn.} Lion's-foot. 



White Lettuce. St. smooth and somewhat glaucous, corymbose-panicu- 

 late above ; radical Ivs. angular-hastate, often more or less deeply lobed ; stem 

 Its. roundish-ovate, dentate, petioled, the lobes or leaves obtuse ; hds. pendulous ; 

 invol. of 8 scales, 9 12-flowered. A conspicuous and not inelegant plant, in 

 moist woods and shades, N. Eng. to Iowa, a.nd Can. to Car. Stem stout, 2 4f 

 high, purplish, often deeply so in spots. The leaves are very variable, the low- 

 est 3 5-lobed or only hastate, the uppermost Ian -eolate, and between these the 

 intermediate forms, hastate and ovate, all irregularly toothed. Scales purplish. 

 Corollas whitish. Pappus brown. Some of the varieties have the reputation 

 of curing the rattlesnake's bite. Aug. 



/?. serpentaria. (Prenanthes serpentaria. P.} Radical Ivs. palmate-sinuate, 

 those of the stem on long petioles, with the middle segment 3-parted ; upper Ivs. 

 lanceolate. 



2. N. ALTISSIMUS. Hook. (Harpalyce. Don. Prenanthes. Linn.) Tall 

 Nabalus. 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 and about 5-flowered. A 

 fall species, with cylindric, yellowish, nodding flowers, found in woods, New- 

 foundland to N. Eng. and Ky. Stem 3 5f high, bearing a narrow and elon- 

 gated panicle. Heads in short, axillary and terminal racemes. Aug. 



ft. ovatus. Riddell. Cauline Ivs. nearly all ovate, on slender petioles. 



y. cordatus. (Prenanthes cordata. Wdld.) Lvs. cordate, on slender petioles. 



<*. deltoidea. (Prenanthes deltoidea. Ell.) Lvs. deltoid, acuminate, acutely 

 denticulate. 



t. dissectus. T. & G. Lvs. mostly 3-parted or divided, segments entire or deep- 

 ly cleft into 2 or 3 narrow lobes. 



3. N. FRASERI. DC. (P. rubicaulis. PA.) leaser's Nafialus. 



St. smooth, corymbosely paniculate above ; Ivs. subscabrous, mostly del- 

 toid, often pinnately lobed, on winged petioles, the upper ones lanceolate, sub- 

 sessile ; invol. of about 8 scales, 8 12-flowered ; pappus straw-colored. TJ. In 

 dry, hard soils, Conn, and Mid. States (rare) to Flor. Stem 2 4f high, with 

 paniculate branches. The leaves are as variable as in our other species, some- 

 times all being lanceolate, with only irregular indentures instead of lobes. 

 Heads drooping, with purplish scales and cream-colored corollas. It is most effec- 

 tually distinguished from N. albus by the more lively color of the pappus. Aug. 



4. N. NANUS. DC. (P. alba. /?. nana. Bw.) 



St. simple, low, smooth ; Ivs. on slender petioles, the lowest variously 

 lobed or parted, the others successively deltoid-hastate, ovate and lanceolate 

 fids, in small, axillary and terminal clusters, forming a slender, racemose pani 

 cle ; invol. greenish-purple, of about 8 scales and 1012 flowers ; pappvx dingy 

 white. This form of Nabalus is sommon on the White Mts., N. H. ! 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. 



5. N. BOOTTII. DC. Boott's NaboJus. 



St. simple, dwarf; lower Ivs. subcordate or hastate-cordate, obtuse, the 

 middle ones oblong, the upper lanceolate, mostly entire; hds. slightly nodding; 

 invol. 10 18-flowered, of 10 15 obtuse, proper scales calyculate at base with 

 lax, linear scales half their length ; pappus straw-color. White Mts., N. H., 

 Whiteface Mt., Essex Co. N. Y. Macrae. N. Am. Fl., II. 482. Stem 58' high, 

 bearing the heads in a subsimple raceme. Flowers whitish and odorous. 



6. N. VIRGATUS. DC. (Prenanthes. MX. Sonchus. Desf. Harpalyce. Beck.) 

 Glabrous and glaucous, slender and simple ; lower Ivs. s.inuate-pinnatifid\ 



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



