By the collar the genus differs from the other genera which are to follow.
The genera of Hydnace are distinguished by the size, shape, and attachment of the teeth.
Thus, as I believe, species are multiplied and genera are formed.
In some other genera they are present, but in a rudimentary condition.
The six descendants from (I) will form two sub-genera or genera.
Andropogoneæ is a very large tribe with about thirty genera.
Only about half a dozen genera occur and most of them on the hills.
He may be said to have had a wonderfully good eye for genera.
But genera are prior to species, for the sequence of their being cannot be reversed.
There are no true alpines, and the European genera are comparatively few.