others have special features about their shape or structure (xeromorphs). thick waxy cuticle ("aloe"); hairy surfaces ("edelweiss"); dense packing of leaves, reduced leaf size (species of cypress); reduced density of stomata (many cacti); pitted and grooved position of stomata (ammophila) water storage in stem and tubers, etc. (baobab). they may also protect this water store from animals by spines and chemicals.