78 
NEW SYLVA. 
ca Mg. Branches terete bianguiar, 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 ve^y large un- 
equal. 
682. Hydr. (Meg.) heterophyla Raf. 
Branches subangular, leaves elliptic, base cor- 
date or truncate or obliquate, apex acum in. 
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 &,c 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 
; r j 
