ae Scientific Intelligence, 
the tube of the corolla; stigmas usually larger and rougher; stame 
tached to, or frequently below, the middle of the corolla-tube, whe 
ameter is thus expanded upward; pollen-grains generally smalle 
more transparent. Secondly, in the short-styled form the pistil is sh 
not rising above half way up the corolla-tube: stigma generally smootl 
and depressed on the summit; stamens attached to the mouth of the: 
rolla-tube, causing an abrupt expansion ; pollen-grai 
and more opaque. According to all the trials, tl 
are accom 
of th 
Isa 
cortusoides, involucrata, and Jarinosa, we see, from the mean re 
their combined products, that for every 100 seeds yielded by the 
norphic unions, only twenty-four are yielded by the homomorphic 
—the heteromorphic thus exceeding the homomorphie unions 
i ve also sho 
4) 
the proportion of five to three! I ha . 
fact that the pollen of a distinct species will produce a much 
tade of fertility 
