SYNGENESIA.—SUPERFLUA. 295 



IIAB. Margin of swamps. U. . Root stolonif., 

 creep. ; Jl. large, pur p. 



21. A. spectabilis- leaves oblong-lanceolate, somewhat 

 scabrous, subamplexicaul ; lower ones serrate in 

 the middle ; branches corymbed ; calyx hemis- 

 pherical, with a subglandular pubescence, folia- 

 ceous, and squarrose ; leaflets ciliate, cuneate- 

 ovate, partly acute. 



HAB. Sandy swamps. Oct. 1J- . Branch. 2—3-/. ; 



Jl. large, blue. 

 j3. bcllidifolius : leaves oblong-obovate, serrate, 



corymb nearly simple, or with the branches mostly 



1 -flowered. 

 IIAB. With the preceding. Stem not hairy and 



glandular above. 



22. A. serotinus : leaves oblong-lanceolate, acuminate, 



sessile, smooth, scabrous on the margin ; inferior 

 serrate ; branches corymbose, smooth ; branchlets 

 one-flowered; scales of the calyx lanceolate, acu- 

 minate, spreading. 

 IIAB. Low grounds. Sept.— Oct. 1J. . Stem 3ft. 

 high ; Jl. large, blue. 



23. A. puniceus: leaves amplexicaul, lanceolate, ser- 

 rate, somewhat scabrous ; branches paniculate : 

 calyx loose, longer than the disk; leaflets linear 

 lanceolate, subequal ; stem hispid. 



IIAB. Brackish swamps. Sept. H. Stem 6 ft. 



high, purp. ; Jl. large, purp. 

 21. A.fluribundus : leaves subamplexicaul, lanceolate; 



inferior serrate; stem smooth; branches corymbed; 



branchlets many-flowered, hairy ; scales of tin 



calyx loose, lanceolate, imbricate. 

 J1AB. Pennsylvania, if. 

 J5. A. novi belgii : leaves subamplexicaul, lanceo 



late, smooth, scabrous on the margin ; inferior 



subserrate ; branches subdivided ; calyx loose. 



imbricate ; leaflets linear-lanceolate ; stem terete. 



smooth. 

 IIAB. Fields. Aug.— Sept. U. Stem 3 ft. high 



jl. middle sized, purp. 



A. acuminatus : leaves broad-lanceolate, narrowed 



nod entire at the base, unequally serrate above 



long-acuminate ; stem simple, flexuous, angular 



