Nabalus. composite. 481 



cleft, parted, or even divided; the lobes or leaves acuminate, repandly 

 toothed or denticulate ; heads in small axillary and terminal clusters, form- 

 ing an elongated virgate panicle ; involucre slender (greenish), of 5 scales, 

 5-6-flowered ; pappus dirty white, or straw color. — Hook.! Jl. Bor.-Am. 1. 

 p. 294 ; DC. -prodr. 7. p. 241 (ex syn.) (N. albus & N. serpentarius, 

 Hook. I. c, at least in part, fide spec. !) Sonchus elatus, &c. Pluk. ! aim. 

 t. 317, /. 2. Preuanthes altissima, Linn.* spec. ed. 2. p. 1121 (ex char. & 

 syn. Pluk.) ; Pursh, fl. 2. p. 498; Ell. sk. 2. p. 256. P. parviflora, Rid- 

 dell, syn. Western plants, p. 50. Chondrilla altissima, Lain. diet. 2. p. 78. 

 Harpalyce altissima, Beck, hot. p. 167. 



[3. ovatus: cauline leaves nearly all ovate, abruptly contracted into 

 winged petioles. 



y. cordatus : leaves mostly cordate, on slender petioles. — N. cordatus, 

 Hook. I. c. Prenanthes cordata, Willd. .' hort. Berol. t. 25 ; Pursh, I. c ; 

 Ell. I. c. 



J. deltoideus : leaves deltoid, strongly repand-toothed ; the upper often 

 cordate, on margined petioles ; the radical and lowest cauline triangular- 

 hastate, sometimes 3-parted. — N. deltoideus & N. cordatus ! DC. I. c. 

 Prenanthes deltoidea. Ell. ! sk. 2. p. 257. 



e. dissectus : leaves all 3-parted or. divided; the segments either entire or 

 deeply 2-3-cleft ; the lobes narrowly lanceolate or linear. 



Woods, Newfoundland ! Canada ! and Northern States ! to Kentucky ! 

 and the mountains of Georgia ! Aug.-Sept.— Stem 3-5 feet high, rather 

 slender, either simple or sparingly paniculate at the summit, sometimes 

 pubescent below, as well as the midrib and margins of the leaves. Corolla 

 yellowish or greenish-white. — A well-marked species, notwithstanding the 

 extremely variable foHage, of which we have enumerated the most striking 

 forms. 



3. N. Fraseri (DC! 1. c.) : glabrous or slightly puberulent; stem corym- 

 bose-paniculate at the summit; leaves mostly deltoid, usually somewhat 

 scabrous, variously and often pinnately 3-7-lobed, and contracted into winged 

 or margined petioles (the lobes short and mostly sinuate-denticulate) ; the 

 upper subsessile, oblong-lanceolate, often undivided; racemes paniculate; 

 involucre (greenish or slightly tinged with purple,) either glabrous or with a 

 few scattered hairs, of about 8 scales, 8-12-flowered ; pappus straw-color.— 

 N. trilobatus, Cass, in diet. sci. nat. I. c. ? N. Fraseri, N. trilobatus & N. 

 serpentarius (3. 1 DC! I. c. Prenanthes folio scabro inciso . . . floribus dilute 

 luteis, &c., Clayt. ! in Gronov. fl. Virg. 3. p. 133. P. rubicunda, Pursh, 

 fl. 2. p. 499, excl. syn. P. alba, Ell. sk. 2. p. 259. 



(3. integrifolius : leaves thickish, lanceolate-oblong, acute or obtuse, den- 

 ticulate, or sharply and irregularly toothed ; involucre often somewhat hairy. 

 — N. integrifolius, Cass. I. c. ; DC. ! I. c. 



y. harhatus: leaves thickish, lanceolate or oblong, mostly sessile; the 

 upper often somewhat auriculate-clasping, sinuate-toothed or nearly entire ; 

 racemes paniculate ; involucre (12-15-flowered) hirsute when young with 

 long purplish hairs ! — Prenanthes crepidinea. Ell. sk. 2. p. 259, not of 

 Michx. 



Dry sterile or sandy soil, from Florida! and Alabama! to New 

 York ! Connecticut ! and Newfoundland 1 (3. Long Island, New York ! and 

 North Carolina ! y. Saluda Mountains of Carolina, Dr. Machrlde. Ala- 

 bama, Mr. Buckley ! Sept.-Oct.— Stem 1-4 feet high, usually much 

 branched : the leaves exceedingly variable. Flowers cream-color or ochro- 

 leucous. — This species, most abundant in the Southern States (where it is 



* The specimens of Prenanthes altissima and P. alba are evidently transposed in 

 the Linnaean herbarium ! 



VOL. II. — 61 



