hybridizing may not lead us to some law of vegetation by which a 
botanist may be able to pre-determine the possible limits of every 
species, as accurately as a mineralogist can now define the limits 
within which all those forms of crystallization must necessarily lie, 
which belong to any particular simple mineral. We would therefore 
suggest to those persons who have opportunities of studying hybrids, 
that they should record their observations under some such form as 
the following table, where we may see at a glance to what extent the 
hybrid resembles, or differs from, both parents. If we were in pos¬ 
session of some hundred comparisons of this kind (and the more 
minute the better), we might then, possibly, be able to detect some 
general law by which the production of hybrids and the limitation of 
species is governed — but until greater pains has been bestowed 
upon such encjuiries than have hitherto been taken, we can hardly 
expect much progress to be made in solving this mysterious question. 
J. S. Hen SLOW. 
SCANDENS. 
PUBESCENCE, less 
dense & rather longer. 
None on the corolla. 
On the edges of the 
calyx, and on the inner 
surface, but only on the 
mid-rib outside. 
LEAVES, rather less 
downy. 
Secondary veins mostly 
depressed beneath. 
CALYX,longer Sc more 
acuminate. 
Hybrid. 
scattered chiefly above 
and below the corolla. 
on both the outside and | 
the inside of the calyx. 
guere, if the paler colour 
was due to the unheal¬ 
thy state of the plant, 
secondary veins much as 
in sc an dens. 
Ervbescens. 
more dense, Sc decided¬ 
ly shorter. 
on the outside of the cor¬ 
olla. 
on both the outside and 
inside of the calyx. 
more downy 
secondary veins marked 
Sc prominent beneath, 
shorter and broader, 
rather more downy out¬ 
side. 
Segments less pinched 
and undulated. 
COROLLA, shorter, Sc 
the segments of the limb 
more connivent. 
Darker Sc more dingy. 
Purplish at the base, 
and white below on the 
throat. 
Less mottled inside. 
H air of the beard on 
ridges inside shorterbut 
ridges more prominent 
RUDIMENTARY Sta¬ 
mens, tufted. 
PISTIL, longer; and 
the lobes of the stigma 
minute. 
segments more pinched 
and undulated. 
longer, and the segments 
of the limb reflexed. 
More arched, 
paler, and less bright, 
white at the base, and 
purplish below on the 
throat. 
more mottled inside, 
hair of the beard longer, 
but ridges less promi¬ 
nent. 
not tufted. 
the lobes of the stigma 
unequal. 
Introduction; Where grown; Culture. It has already 
been mentioned that this hybrid plant was raised in the Botanic 
