282 DICOTYLEDONOUS PLANTS. 



poiite. I have specimens collected near New-Orleans by Dr. 

 T. R. Ingalls. 



3. S. ambigua Nutt. : low, subdecumbent and divaricately branched : 

 leaves sessile, ovate, remotely and rarely serrate, subhirsute above : 

 flowers small, axillary. <S. parvula Mich. ? 



HAB. Rocky grounds. Can. N. J. Ohio. W. to Miss. July. 

 2/. Root long, consisting of a succession of tubers. Stem co- 

 loured, branched divaricately from near the base, 46 inches 

 high. Leaves small, closely sessile, prominently veined. Flow - 

 ers small, axillary, blue, hairy. I have found this plant on the 

 slate hills near New-Brunswick, N. J. The specimens obtained 

 from that locality, agree exactly with the Canadian plant re- 

 ceived from my friend, Dr. A. F. Holmes, of Montreal. It has 

 also been found by Dr. Houghton on the Upper Mississippi. 



** Flowers racemose. 



4. fif. later\flora Linn. : much branched, nearly smooth ; leaves on 

 long petioles, ovate, toothed, those of the stem slightly cordate, mem- 

 branaceous ; racemes lateral, leafy. 



HAB. Wet meadows. Can. to Car. and W. to Miss. July, Aug. 

 If.. Stem 12 feet high, branching. Flowers email, blue, in 

 long racemes. At one time in, great repute as a cure for hydro- 

 phooia. Skull-cap. 



5. &'. integrifolia Linn. : stem nearly simple, densely pubescent ; 

 leaves subsessile, oblong, obtuse, wedge-form at base, obscurely tooth- 

 ed ; racemes loose, leafy. 



HAB. Swamps. N. Y. to Car. W. to Miss. June. H.Stcm 

 1824 inches lu'gh. Flwcen large, blue, opposite, often in 

 panicles. A variable species. 



6. 8. hyssopifoUa Linn. : minutely and densely pubescent, branched; 

 leaves lanceolate-linear, very entire. 



HAB. Swamps. Penn. Mulil. June. 2^. Stem a foot high. 

 Leaves obtuse. Flowers very large. Perhaps only a variety of 

 the preceding. 



7. &'. pilosa Mich. : nearly simple ; pubescent ; leaves remote, rhom- 

 bic-ovate, obtuse, attenuated at the base into a petiole, rounded-cre- 

 nate ; racemes terminal, loose, mostly branched ; bracts lanceolate 

 entire. & caroliniana Walt. & ovalifolia MM. Torr. 



HAB. Rocky woods. Penn. to Car. July. U.Stem 1820 

 inches high. Lower leases cordate. Flmcers large, whitish, in 

 paniculate racemes. 



8. 8. canescens Nutt. : branched ; leaves ovate, acute, petiolate, 

 acutely toothed, under side with the bracts and flowers hoary-villous : 

 lower leaves subcordate ; racemes pedicelled, subpaniculate, axillary 

 and terminal ; bracts ovate-lanceolate, longer than the calyx. 



HAB. Woods. Penn. W. to Miss. July. If. Stem 2 3 feet 

 high. Leaves large, whitish beneath. Flowers deep blue, in 

 lateral and terminal racemes. 



