I.
Imbricated, a. L. imber, rain, imbrex, a hollow roof tile to shed rain; imbricare, to cover with roof tiles; lying over one another, or lapping, like tiles on a roof. Applied to sepals that overlap over a bud.
Included, a. L. in, in, claudere, to shut, close; confined within something. Said of the stamens when they do not project beyond the mouth of the corolla.
Inherit, v. L. in, in, heres, heir; to take by descent from an ancestor. Plants, like people, inherit their characteristics from their parents.
Iron, n. A very abundant and very important metal. In small quantities it enters into the composition of plants and animals.
Irritate, v. L. irritare, to excite; to excite to action. Rubbing irritates the skin and causes extra blood to flow to the spot and thus redden it. Rubbing may also irritate plant tissues and cause an extra flow of sap to the part irritated.