Nabalijs. LXXV. COMPOSITiE. 361 



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

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

 5 — 18-Jkiwered, not yellow, although often straw-colored. 



§ Heads pe^idulous, glabrov^. Leaves ver^y variable in the same species. 



1. N. ALBUs. Hook. (Harpalyce. Don. Prenanthes. Linn.) Liori's-foot. 



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

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

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

 invol. of 8 scales, 9 — l2-flowered. — A conspicuous and not inelegant plant, in 

 moist woods and shades, N. Eng. to Iowa, and 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. 



0. serpcntaria. (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. Do7i. 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 ; Arf.s. pendulous ; i^ivol. of 5 scales and about 5-flowered. — A 

 tall 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 racemet;. Aug. 



fi. ovabiis. Riddell. Cauline Ivs. nearly all ovate, on slender petioles, 



y. cordatus. (Prenanthes cordata. Willd.) Lis. cordate, on slender petiok.s. 



6. deUoidea. (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. Fkaseri. DC. (P. rubicaulis. Ph.) Fraser's Nabalus. 



St. smooth, corymbosely paniculate above ; lvs. 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. — % In 

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

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

 limes 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. 0. nana. Uw.) 



SI. simple, low, smooth ; lvs. on slender petioles, the lowest variously 

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

 hds. in small, axillary and terminal clusters, forming a slender, racemose pani- 

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

 white.— This form of Nabalus is common 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. EooTTii. DC. Biwtfs Nabalus. 



St. simple, dAvarf ; Icmcr lvs. subcordate or hastate-cordate, obtuse, the 

 middle ones ohKmg, the i.'/jpcr lanceolate, mostly entire ;A^/5. slightly nodding; 

 invol. 10— 18-flowcred, of 10—15 obtuse, proper scales cal3'culate 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 5—8' high, 

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



6. N. viRGATL-s. DC. (Prenanthes. Mx. Sonchus. Desf. Harpalyce. BecJc.) 

 Glabrous and glaucous, slender and simple; Uw-er lvs. sinuate-pinnatifid, 



petiolate, middle snss toothed, sessile, upper entire, partly claspmg, gradually 



