284 Scientific Intelligence. 
faces and margins of the long stigmas; and as soon as the insect ts 
proboscis to a rather greater depth into the short-styled flowers, it will leave 
pollen on their upturned stigmatic surfaces. Thus the stigmas of both forms 
will indifferently receive the pollen of both forms; but we know that the 
pollen of the opposite form alone will produce any effect and cause fertil- 
zation. 
gre cla ; , 
proboscides between the stigmas or between the anthers, but will strike 
against them, at nearly right angles, with the back of their head or thorax. 
Now, in the long-styled flowers of L. perenne, if each stigma had not rotated 
On its axis, insects in visiting them would have struck their heads against the 
backs of the stigmas; as it is, they strike against the papillous fronts of the 
s of co 
other form, fertilization is perfectly effected. Thus we can understand the 
meaning of the torsion of the styles in the long-styled flowers alone, as well 
as their divergence in the short-styled flowers.” 
Li 
on the ground of Planchon’s remark, that the styles are in the same — 
m 
stigmatic tissue.” ere the n es 
fertile unions possible is largely increased. These degrees of sterility in - 
homomorphie unions,—from complete inertness of the pollen to the oc- 
erles are so readily made by the study of some of the commonest plants, 
of occupation, nor suppose that the field is exhausted. Out of old fields, 
not only comes all this new corn from year to year, but 
ese are richer far in interest than any crop of new s 
tatim.” Let us add, in conclusion, that whet such fine biological discov- 
