92 COMPOSITE. MiKANiA. 



Moist shady places, and along streams, Massachuselts! to Louisiana! 

 common ; the more pubescent forms occurring in the Southern States. 

 July-Sept. — Flowers purplish-white or flesh-color. Anthers appendiculate 

 at the apex. 



18. CONOCLINIUM. DC. prodr. 5. p. 134. 



Heads many-flowered. Involucre campanulale ; the scales linear or sub- 

 ulate, somewhat imbricated in 2-3 series, nearly equal. Receptacle naked, 

 conical ! Corolla tubular-infundibuliform, 5-toolhed at the summit. Anihers 

 included. Branches of the style somewhat cylindrical, obtuse. Achenia 

 angled, glabrous. Pappus capillary, scabrous, in a single series. — Perennial 

 herbs or suffruticose (American) plants, with opposite petioled toothed leaves. 

 Corymbs terminal, crowded. Flowers blue or purple. 



1. C. ccelesdnnm (DC. ! 1. c.) : herbaceous, pubescent or nearly glabrous; 

 leaves deltoid-ovate, often slightly cordate, tapering to the apex, coarsely 

 crenate-serrate, tripli-nerved, on slender petioles; scales of the (3()-60-flow- 

 ered) involucre about 30, nearly subulate. — Eupatorium cnRlesliiium, Linn, 

 spec. 2. p. 838 ; Willd. ! spec. 3. p. 1764 ,• iV//c/(.r. / ji. 2. p. 100 ,• Eli. sk. 2. p. 

 306; Darlingt.! Jl. Cest. /?. 462. Coelestina cTerulea, Spreng. syst. 3. p. 

 446; Beck! bot. p. 198 ; Hook.! compan. to bot. mag. p. 96; not of Crtss., 

 Less. Sfc. 



Thickets &c. Pennsylvania, and throughout the Western and Southern 

 States! Sept. — Stem 2-3 feet high, sometimes hairy. Flowers light bluish- 

 purple, fragrant. Achenia dotted with resinous globules. — The genus is dis- 

 tinguished from Eupatorium merely by the conical receptacle. 



Subtrlbe 2. Tussilaginej-, Less. — Heads with the flowers dissimilar or 

 somewhat diojcious (white, purplish, or sometimes yellow) ; the pistillate 

 either ligulate or tubular. 



19. NARDOSMIA. Cass. diet. 35. p. 186 ; Less. syn. p. 139. 



Heads many-flowered, somewhat dioecious. Stj:rile Pl. Flowers of 

 the ray in a single series, pistillate, ligulate ; of the disk numerous, perfect 

 but infertile, with the corolla tubular and 5-toothed. Fertile Pl. Flow- 

 ers of the ray in several series, pistillate, minutely ligulate ; those of the 

 disk few, tubular. Scales of the involucre in a single series, e(]ual to or 

 shorter than the flowers. Receptacle flat, naked. Achenia somewhat terete, 

 glabrous. Pappus capillary, that of the sterile plant shorter and less copious 

 than of the fertile. — Perennial herbs (in N. America nearly confined to the 

 northern regions). Leaves radical, cordate, toothed or lobed, petioled, ap- 

 pearing with or rather later than the flowers. Scape with scaly bracts; the 

 heads in a fasligiate thyrsus or corymb. Flowers purplish or nearly white, 

 fragrant. 



1. N.frigida (Hook.) : leaves cordate, unequally coarsely and obtusely 

 toothed, and somewhat lobed, glabrous above, the lower surface white and 



