482 COMPOSITiE. Nabalus. 



called Gall-of-the-Earth), resembles N. albus in its mode of growth, number 

 of flowers, &c., but N. altissimus in its pappus. The very remarkable var. y. 

 but appears to pass through var. 13. into the ordinary state of the plant. 



4. N. nanus (DC.) : glabrous ; stem simple, low ; leaves deltoid-hastate, 

 angulate, or variously lobed or cleft, on slender petioles ; heads in small 

 axillary and terminal clusters, forming a strict racemose panicle ; involucre 

 (livid or blackish-green) 10-13-flowe'red, of about 8 obtusish proper scales; 

 the bracteolate scales very short, triangular-ovate, appressed ; bracts and 

 bracteoles minute and subulate ; pappus dark straw-color. — DC! prodr. 7. 

 p. 241. Prenanthes alba, var. nana, Bigel. ! fi. Bost. ed. 2. p. 286 ; Torr. ! 

 compend. p. 277 (partly). Harpalyce alba /3. Beck. hot. p. 167. 



Alpine region of the White Mountains of New Hampshire ! and of 

 Essex County, New York ! Aug.-Sept.— Plant 5-10 inches high. Leaves 

 varying in the same manner as those of N. altissimus, either all undivided 

 and hastate-triangular, angulate-toothed, or hastate-3-lobed ; _ or else the 

 lower or the whole 3-parted, with the divisions 2-3-cleft or entire, oblong Or 

 lanceolate, often somewhat ciliate when young, as well as the tips of the 

 involucre. Heads nearly as large as hi N. albus. Flowers whitish. 



5. N. Boottii (DC.) : stem simple, dwarf, pubescent at the summit when 

 young ; radical and lowest cauline leaves subcordate or hastate-cordate, ob- 

 tuse °the middle oblong ; the upper lanceolate, mostly entire, tapering into a 

 margined petiole; heads in a simple or nearly simple raceme, slightly nod- 

 ding; bracts and bracteoles linear; involucre (livid) 10-18-flowered, of 

 10-15 obtuse proper scales; the calyculate scales linear, lax, unequal, nearly 

 half the length of the proper involucre ; pappus straw-color. — DC. ! prodr. 

 7. p. 241. Prenanthes alba, var. nana, in part, Bigel.! I. c. Sfc. 



Higher alpine summits of the White Mountains of New Hampshire ! 

 On the extreme summit of Whiteface Mountain, Essex County, New York, 

 Mr. Macrae ! Aug.-Sept. — Plant 5-8 inches high. Scales of the invo- 

 lucre very obtuse, "pubescent-ciliate when young; the calyculate scales 

 nearly similar, but shorter and unequal. Flowers whitish. — Nearly allied 

 as is this species to the preceding, yet the characters we have indicated ap- 

 pear to be constant. According to Mr. Tuckerman, the flowers are odorous 

 in this species, but not in N. nanus. 



6. N. virgatus (DC.) : glabrous, somewhat glaucous; stem virgate, very 

 simple; cauline leaves lanceolate, acute, closely sessile or partly clasping ; 

 the upper entire and gradually reduced to bracts ; the lower toothed or pin- 

 natifid ; the radical tapering into a margined petiole, sinuately or runcinately 

 and often deeply pinnatifid ; the lobes lanceolate-linear or oblong; heads in 

 small clusters, on short many-bracteolate peduncles (the minute bracteoles 

 subulate), forming a very long and slender mostly unilateral spicate raceme; 

 involucre (smooth and purplish) of about 8 proper scales, 8-12-flowered ; 

 pappus straw-color. — DC! I. c. — Prenanthes virgata, Michx. ! fl. 2. p. 83; 

 Willd. ! spec. 3. p. 1533 ;Pursh, fl. 2. p. 498 ; Ell. sk. 2. p. 258. P. sim- 

 plex, Pursh, I. c. excl. syn. P. autumnalis, &c. Gronov. ! fl- Virg. ed. 2. 

 p. 113; Walt.! Car. p. 193. Sonchus virgatus, Desf., ex Steud. Har- 

 palyce virgata, Beck. hot. p. 167. 



Moist places, in sandy fields and pine barrens. New Jersey! to Florida! in 

 the low country. Sept.-Oct. — Stem 2-4 feet high ; the naked wand-like 

 raceme 1-2 feet long. Flowers purplish. (' Dr. WitVs Snake-rool.' Clayt.) 



§ 2. Heads nodding or erett: involucre calyculate, 12-35-flowered, hirsute. 

 (Leaves mostly undivided.) 



7. N. racemosus (Hook.) : stem virgate, simple, and with the leaves smooth 

 and glabrous; radical and lower cauline leaves oval, oblong, or oblanceolate, 



