Eo , A tori A cb S ] 8YNGBNESIA 449 



«f Jv,<*»- heads in a long terminal spike; leaflets of the involucre 

 lateatoase, uw © 



obion*. obtuse. itecfc, BoU p. 175. 



L macrostachya. JfcCr. Am. 2. p. 91. Pursh, Am. 2. p. 507. Bart. 



Phil. 2. p. 96. 



Sfiked Liatris. Fw/§*o — Blue Blazing Star. Button Snake-root. 

 Root perennial, tuberous, with many small fibres. Stem 2 to 4 or 5 feet high, 

 • nle striate, smooth. Leaves numerous, alternate, 1 to 6 or 8 inches long, and 

 n'nctoi third of an inch wide, entire, sessile, the larger ones narrowed tow- 

 ds the base and a little dilated at the insertion, nerved, pilose along the nerves* 

 newhat ciliate at base. Heads of flowers sessile, or subsessile, in the axils of 

 1 nce-linear bracts, mostly crowded in a dense terminal spike 6 to 12 or 15 inches 

 in length ; involucre oblong, terete, punctate, about 8-flowered,— the outer or lower 

 leaflets ovate, acute, or acuminate, the inner ones oblong, obtuse, the margin thin 

 and somewhat scarious, minutely ciliate, often purple. Florets bright purple, 

 litotes obconic, angular and ribbed, puncliculate, hirsute, pale brown ; pajqms 

 scabrous-plumose. 

 Hob. Moist grounds ; borders of woods, &c. frequent. Fl. August. Fr. Sept. 



Ob$. The root of this handsome plant is a popular medicine,— the tincture, or 

 infusion, being often used in cases of chronic rheumatism, debility, <5cc. About 20 

 additional species are found in the U. States,— chiefly in the South and West. 



370. KUHNIA. L. Nutt. Gen. 641. 

 (In honor of Dr. Adam Kuhn, of Penn. "Linnao ex discipulis acceptissimus."] 



Heads many-flowered. Involucre of several series, cylindric. Corolla 

 with the limb not distinct from the tube. Pappus in a single series, 

 plumose. Akenes subcylindric, not beaked, many-striate, pubescent. 

 Receptacle naked. 



1. K. eupatortoides, L. Leaves lanceolate and lance-ovate, serrate, 

 petiolate; corymb contracted, few-flowered. Beck, Bot.p. 195. 



EUPATORIUM-LIKE KuHBIA. 



Root perennial. Stem 2 to 3 feet high, slender, somewhat branched, striate, pu- 

 bescent, especially on the young branches. Leaves 1 to 3 or 4 inches long, and 1 

 third of an inch to an inch wide, mostly alternate, rather thin and membrana- 

 ceous, coarsely and irregularly serrate, slightly scabrous above, somewhat pubes- 

 cent beneath, and thickly sprinkled with resinous dots, the lower ones shorter 

 and broader, ovate or lance-ovate, 3-nerved, the upper ones linear-lanceolate, all 

 narrowed at base to a short petiole. Heads of flowers in a small terminal co- 

 rymb; involucre cylindric* pubescent, the outer leaflets small, acuminate. Floret* 

 whitish. Akenes finely striate ; jxippus plumose, white, or often tawny. 



Hob. Great Valley, near Brooke's Mill : rare. Fl. September. Fr. Octo. 



Obs. Collected by D. Townsbhd, Esq. in 1633; at the above locality,— where, 

 however, it is more rare than the following. 



2. K. Critonia, JVilld. Leaves lance-linear, mostly entire and sessile ; 

 panicle corymbulose, spieading, many -flowered. Beck, Hot. p. 195. 



Critonia Kuhnia. Mx. Am. 2. p. 101. 



Root perennial. Stem 2 to 3 feet high, slender, striate, rough ish-pube nil em, 

 often dark purple, corymbosely branched at summit. Leaves 1 to 2 or 3 inches 

 long, and 2 or 3 lines to near half an inch wide, alternate, acute at each end, mostly 

 entire, and somewhat re volute on the margin, slightly pubescent, punctate beneath 



38 # 



