Herb : a plant with no persistent woody
stem above ground : also a plant used in seasoning and medicine.
Hilum: the scar on a seed at which it is
attached to the stalk or hilum.
Hypanthium: a tubular or flask-like part
of the floral axis which grows up above the level of the ovary and bears
on its margin or at other levels the floral
envelops and all stamens.
Hypocotyle: the axis of an embryo below
the cotyledons.
