Hilum (hilus). The point where the ovule or the seed is attached to the funicle or the placenta.
Hirsute (hirsutus). Densely covered with erect, rather short and stiff hairs.
Hispid (hispidus). Beset with long stiff hairs.
Hyaline (hyalinus). Membranous and translucid.
Hypogynous (hypogynus). Inserted at the base of the ovary or below it, upon a small and flat or an elevated receptacle.
Imbricate (imbricatus). Overlapping at the edges, as the tiles of a roof, especially in the bud.
Imparipinnate (imparipinnatus). Unequally pinnate, i.e., pinnate with a terminal leaflet.
Included (inclusus). Concealed within the tube of the perianth or corolla.
Incumbent (incumbens). Placed upon the back, especially of the cotyledons.
Indehiscent (indehiscens). Remaining closed at maturity.