290 



CICHOS.IACEAK. 



[Vol. III. 



5. Nabalus nanus (Bigel.) DC. Low Rattlesnake-root, or Lion's-foot. 



(Fig. 3580.) 



Pieitanllies alba var. nana Bigel. Fl. Bost. Ed. 2, 



286. 1824. 

 Nabalus nanus DC. Prodr. 7: 241. 1S38. 

 Prenanlhes serpenlaria var. nana .\. Gray, Syn. Fl. 



i: Part 2, 434. 1884. 



Glabrous throughout; stem simple, erect, 4'- 

 16' high. Basal and lower leaves slender-peti- 

 oled, 3-divided, or sometimes broadly hastate, 

 the divisions variously lobed, toothed, or entire, 

 usually sessile,occasionally stalked; upper leaves 

 much smaller, entire, toothed, or lobed, sessile, 

 or short- petioled; inflorescence thyrsoid, glomer- 

 ate-spicate or racemose, rarely with i or 2 short 

 ascending branches; involucredark purple-brown 

 or nearly black, glabrous, 4"-6" long, its inner 

 bracts 5-S, slightly ciliate at the apex, about as 

 longasthe usually bright brownish pappus; outer 

 bracts lanceolate to ovate lanceolate. 



Alpine suniinits of tlie .\dirondacks and the 

 mount.iiiis of New F.ngland; Nova .Scotia to Labra- 

 dor and Newfoundland. Aug. -Sept. 



6. Nabalus virgatus (Michx.) DC. 

 Slender Rattlesnake-root. (Fig. 3581.) 



1803. 



Prenanlhes vifgala Slichx. Fl. Bor. Am. 2: 84. 

 Nabalus virga'lus DC. Prodr. 7: 242. 1838. 



Glabrous, somewhat glaucous; stem strict, mostly 

 simple, 2°-4° high. Leaves lanceolate or oblong- 

 lanceolate, the basal and lower ones sinuatepin- 

 natifid or pinnately parted, petioled, often 10' long, 

 the lobes entire or dentate, distant; upper leaves all 

 sessile, pinnately lobed, or the uppermost entire, 

 very small and bract-like; heads very numerous, 

 pendulous, about 2" broad, in a narrow, simple or 

 branched, terminal thyrsus, often unilateral; invo- 

 lucre purplish, about i,";" thick and 5" long, its 

 principal bracts about 8, with several minute outer 

 ones; flowers white or pinkish ; pappus straw-color. 



In moist sandy soil, New Jersey to Florida, near the 

 coast. Called also De Witt's Snakeroot. Sept. -Oct. 



7. Nabalus Boottii DC. Boott's 

 Rattlesnake-root. (Fig. 3582.) 



Nabalus Bootlii DC. Prodr. 7: 241. 183S. 

 Prenanlhes Booltii A. Gray, Svn. Fl. i: Part 2, 435. 



1884. 



Glabrous below, commonly pubescent above; 



stem simple, \'-\l' high. Leaves thickish, the 



basal and lower ones ovate, hastate, or deltoid, 



petioled, mostly obtuse, entire, or denticulate, 



I '-2' long, the upper ovate or oblong, usually 



entire, short-petioled or sessile, much smaller; 



heads several or numerous, lO-iS-flowered, erect, 



spreading, or some of them pendulous, racemose 



or somewhat thyrsoid, 4"-5" broad; involucre 



campanulate-oblong,2 ' j"-3" thick, 4"-7" long, 



dark purplish-green, its principal bracts 8-10, 



obtuse or obtusish, with several shorter outer 



ones; flowers whitish, odorous; pappus brownish. 



.Alpine summits of the mountains of northern 

 New England and New York. July-Aug. 



