H
HALOPHYTE a plant that grows in salty soil.
HELIOTROPIC growing towards sunlight.
HETEROPHYLLOUS having leaves of different form.
HIRSUTE hairy, with long distinct hairs.
HISPID with rough hairs or bristles.
HYDATHODE water-secreting pore on leaf ( Craussulacae have them for the rapid absorption of water).
HYGROCHASTIC applied to plants in which the opening of the fruits is caused by the absorption of water (98 percent of mesems have hygrochastic capsules).