We shall clearly understand why monœcious and diœcious,—why dimorphic and trimorphic plants exist, and many other such cases.
So it is, as I have myself observed, with some dimorphic plants.
He generally used the chrysalids of the Papilio Turnus, whose females are dimorphic, that is, having two distinct forms.
The species is dimorphic in the female sex in the southern portions of the territory which it occupies.
The dimorphic variety umbrosa, Lintner, has the upper side of the hind wings almost entirely black, except at the base.
All dimorphic and trimorphic plants present such difference in function and in size.
On the character and hybrid-like nature of the offspring from the illegitimate unions of dimorphic and trimorphic plants.
Hottonia is dimorphic, with pollen of very different sizes in the two forms.
The occurrence of dimorphic and non-dimorphic species in the same genus is quite the same as I find in Linum.
The cases of the Primulae which lose by variation their dimorphic characters seem to me very interesting.