78 NEW SYLVA. 



ca Mg. Branches terete biangular, leaves o- 

 vate serrate acuin. base rounded, beneath glau- 

 cous smooth, upper leaves subsessile, cymes ra- 

 diate, neutral rays 3-4fid Alabama and Alia- 

 ghanies, leaves thin large, flowers white, rays 

 with unequal rounded segments. Capsules ax 

 in most species with 10 prominent nerves. 



681. HYDR. (Meg.) ROTUNDIFOLIA Rat 

 Branches angular rough, lower leaves petiolate 

 rounded and orbicular acum. serrate, base not 

 cordate, rough above, pale beneath, nervog 

 rough pubescent, upper leaves sessile ovate 

 base acute, cymes radiate, rays 3-4fid large 

 rounded obtuse. Wasioto Mts. of Kentucky 

 and Virginia on rocks, 3 to 4 feet high, leave* 

 small, flowers large white, rays very large un- 

 equal. 



682. HYDR. (Meg.) HETEROPHYLA Ra 

 Branches subangular, 4eaves elliptic, base col* 

 date or truncate or obliquate, apex acumia. 

 falcate, unequaly serrate, beneath concolor ; 

 nerves puberulent, upper leaves rounded base 

 rounded, cymes hardly radiate pubescent, rays 

 ovate acute. Wasioto Mts. of Kentucky disc. 

 1823 with the last, akin but distinct by leaves 

 and rays, these sometimes lacking. 



G83. HYDR. (Meg.) C'ORDATA Pursh. E. &c. 

 Branches angular ,leaves firm rounded base sub- 

 cordate, dentate shortly acuminate, rough above 

 beneath concolor veins reticulate smooth, cymes 

 radiate, rays many ovate acute, 2 oblong bracts 

 ^-Virginia, Carolina, Kentucky &c on rocks, 

 humble shrub 2 to 4 feet high, with larger 

 thicker leaves, and ample cymes. 



684. HYDR. (Meg.) AMPMFOMA Raf. Branch- 

 es subangular leaves on very long petiols thin 

 ample ovate, lower subcordate at base, smooth 



