184 DICOTYLEDONOUS PLANTS. 



purple ; inner scales of the involucre often coloured. The habit 

 of this species is very much like that of a corymbose Liatris, and 

 Mr. Nuttall thinks it is the A. elcgans of Willdenow. 



22. A. spectabtlis Ait. : leaves oblong-lanceolate, somewhat scabrous 

 and clasping ; lower ones serrate in the middle ; branches corymbose ; 

 involucre hemispherical, somewhat glandularly pubescent, foliaceous 

 and squarrose ; scales ciliate, cuneate-ovate and partly acute. 



b. teffidifatttu \titt. : leaves oblong-obovate, serrate ; corymb near- 

 ly simple, with the branchlets mostly 1-flowered. A. bdlidijlorus 

 mUd.f 



HAB. Swamps. N. J. to Virg. Aug. Nov. U. Stem 2 feet 

 high ; branches 2 or 3-flowered, somewhat hairy. Flowers 1015 

 in a corymb, large and blue. Var. b. has the stem never hairy 

 above. 



23. A. scrotinus Willd. : leaves oblong-lanceolate, acuminate, sessile, 

 smooth, scabrous on the margin ; lower ones serrate j branches corym- 

 bose, smooth ; branchlets 1 -flowered ; scales of the involucre lanceo- 

 late, acuminate, spreading. 



HAB. Low grounds. N. Y. to Virg. Sept. Nov. 1 Stem 

 3 feet high, flowers large, blue. 



24. A. puniceus Linn. : stem hispid ; leaves clasping, lanceolate, ser- 

 rate, somewhat scabrous j branches paniculate ; involucre loose, ex- 

 ceeding the disk ; scales linear-lanceolate, nearly equal. 



HAB. Salt swamps. Can. to Car. Sept. Nov. IT- Stem 6 8 

 feet high, purplish. Flowers large, purple or blue. 



25. A. novi belgii Linn. : stem terete, smooth ; leaves subclasping, 

 lanceolate, smooth, scabrous on the margin ; lower ones somewhat ser- 

 rate ; branches subdivided ; involucre loosely imbricated ; scales linear- 

 lanceolate. A. noti belgii and A. jtoribundus Hilld. 



HAB. Fields. N. S. Aug. Oct. K. Stem 3 feet high. 

 Flowers middle-sized, pale purple. 



26. A. acuminates Mich. : stem simple, flexuous, angular ; leaves 

 broad-lanceolate, tapering and entire towards the base, unequally 

 serrate near the summit, conspicuously acuminate ; panicle corym- 

 bose, divaricate, dichotomous ; scales of the involucre loose, linear. 

 shorter than the disk. 



HAB. Can. and mountains in N. S. Aug. Oct. 2J..8lcm a 

 foot or more high. Learcs large. Flowers middle-sized; rays 

 white. 



27. A. dracwiculoidcs Jtllld. : stem nearly smooth ; leaves linear, 

 acuminate, very entire ; lower ones linear-lanceolate, subserrate ; 

 branches corymbose ; involucre imbricate. 



HAB. Low grounds. N. J. to Car. Sept. Nov. L. Stem 4 

 feet high. Flowers small ; rays white. 



2. Flowers in panicles. 



28. A. amplexicaulis Willd. : stem smooth, paniculate ; leaves ovate- 



