0 having two cotyledons (= leaf parts inside the seed):
These plants usually parasitize the stems of dicotyledonous trees.
Figure 1.25 shows a transverse section through the midrib of a dicotyledonous leaf.
The anatomy of the rest of the cotton seed is similar to that of other dicotyledonous seeds.
A total of 43 dicotyledonous species were identified.
The great majority of whiteflies in existence today colonize only dicotyledonous angiosperms and a smaller, but significant, number feed on monocots, particularly grasses and palms.
This abrupt diversity gradient suggests a powerful selection pressure in the crab zone preventing the establishment of certain dicotyledonous species.
These total stems represented 95 different species from 77 different genera and 42 different families of dicotyledonous plants.
