(a) The lower surface of a dorsoventral dicotyledonous leaf possesses greater number of stomata. In an isobilateral / monocot leaf, the number of stomata are equal on both of its surfaces.
(b) The transpiration from a leaf depends on thickness of stationary layer of air/boundary layer that is in immediate contact with leaf.
(c) It depends on surface features of the leaf such as hardness of the leaf surface as well as wind speed.
(d) The thinner the boundary layer, the greater is transpiration.
(e) There must be diffusion gradient between boundary layer and atmosphere on one side and stomatal cavity on the other side for transpiration