^y NEW SYLVA. 



ca Mg. Branches terete biangular, leaves o- 

 vate serrate acum. base rounded, beneath glau- 

 cous smooth, upper leaves subsessile, cymes ra- 

 diate, neutral rays 3-4fid — Alabama and Alle- 

 ghanies, leaves thin large, flowers white, rays 

 with unequal rounded segments. Capsules as 

 in most species with 10 prominent nerves. 



681. Hydr. (Meg.) rotundifolia Raf. 

 Branches angular rough, lower leaves petiolate 

 rounded and orbicular acum. serrate, base not 

 cordate, rough above, pale beneath, nerves 

 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, leaves 

 small, flowers large white, rays very large un- 

 equal. 



682. Hydr. (Meg.) heterophyla Raf. 

 Branches subangular, leaves elliptic, base cor- 

 date or truncate or obliquate, apex acumin. 

 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. 



683. Hydr. (Meg.) cordata 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 &lc on rocks, 

 humble shrub 2 to 4 feet high, with larger 

 thicker leaves, and ample cymes. 



684. Hydr. (Meg.) amplifolia Raf. Branch- 

 es subangular leaves on very long petiols thin 

 ample ovate, lower subcordate at base, smooth 



