SYNGENESIA SUPERFLUA. 415 



A. Tradescanti : leaves lanceolate, serrate, sessile, smooth ; branches 

 virgate ; calyx loose, imbricate ; stem terete ; smooth. 



HAB. Fields. Aug. Oct. ; stem 3 feet high ; flower small, white 

 or blue. 



A. laxus : leaves linear-lanceolate, acuminate, scabrous on the margin 

 the lower ones subserrate, those of the stem subreflexed, of the 

 branches much spreading ; stem loose, paniculate above ; calyx im- 

 bricate ; scales lanceolate, acute, reflexed at the apex. 



HAB. Fields. Sept. Oct. I).; flower small, white. 



A. miser : leaves sessile, lanceolate, serrate, smooth ; scales of the 

 calyx acute ; disk equal to the ray ; stem somewhat villous. 



HAB. Old fields. Sept. Oct. ; flower small, while. 



a. dirergens ; leaves elliptical-lanceolate, those of the stem elongated ; 

 branches spreading. 



b. diffusus : leaves all proportioned. 



g. pendulus : leaves of the branches rather remote ; branches very di- 

 varicate, pendulous. 



c. Leaves cordate, serrate. 



A. undulalus : leaves oblong-cordate, amplexicaul, very entire, hairy, 

 somewhat undulate ; inferior ones ovate, cordate, subserrate ; peti- 

 oles winged ; stem paniculate, hispid ; branches secund, leafy, 1- 

 flowered. 



HAB. Dry woods, &c. Sept. %; stem 2 feet high; flower middle- 

 sized, blue. 



A. sagittifolius : leaves oblong-lanceolate, acuminate, sessile, serrate 

 in the middle ; radical ones oblong, cordate-sagittate, serrate, petio- 

 olate ; stem branched, smooth ; scales of the calyx loose, lanceolate. 



HAB. In rocky woods. Sept. Tj. ; flower middle-sized, blue. 



A. paniculatus : leaves ovate-lanceolate, subserrate, petiolate, smooth ; 

 radical ones ovate-cordate, serrate, scabrous, petiolate ; petioles na- 

 ked ; stem much branched, smooth ; branches hairy ; calyx loose, 

 subimbricate. 



HAB. Fields and woods. Sept. 7J.; stem 23 feet high; flower 

 pale blue. Near A. undulatus. 



A. cordifolius : leaves cordate, hairy beneath, acutely serrate, petio- 

 late ; petioles winged ; stem paniculate, smoothish ; panicle divari- 

 cate ; calyx loose, subimbricate. 



HAB. Rocky woods. Sept. Ij. ; stem 2 feet ; flower rather small, 

 pale blue. 



A. corymbosus : leaves ovate, acutely serrate, acuminate, smoothish; 

 inferior ones cordate, petiolate ; petioles naked ; stem smooth, corym- 

 bose-fastigiate above ; branches hairy ; calyx oblong, imbricate ; scales 

 obtuse, closely appressed. 



HAB. Dry woods. July Aug. 7J. ; stem %feet high ; flower mid- 

 dle-sized, white. 



A. macrophylhis : leaves ovate, petiolate, serrate, scabrous; uppei 

 ones ovate-cordate, sessile ; inferior cordate, petiolate ; petioles some- 

 what margined ; stem branched, diffuse ; calyx cylindrical, closely 

 imbricate ; scales oblong, acute. 



HAB. Woods. Aug. $j stem 2 feet high; flower pretty large,, 

 white or pale blue. 

 36* 



