Igneus

Bright scarlet.

Imbcrbis

Destitute of hairs.

Imbricate

Applied to leaves or to the parts of a flower when they overlap each other.

Imparipinnate

Unequally pinnate, having an odd terminal leaflet.

Incomplete

Some part wanting, as calyx, corolla, etc.

Indusium

The membranous covering of the spore-cases of many Ferns.

Inferior

Applied to an ovary when the calyx-tube is adnate to it, and to the calyx when it is quite free from the ovary and below it.

Introrse

Anthers opening inwards, towards the axis, are introrse.

Involucre

The name given to one or more series of bracts surrounding a head of flowers, etc.

Irregular

Petals or sepals unequal in size or different in form in the same flower.

Jugum

Applied to a pair of leaflets; thus a leaf may be unijugate, bi-jugate or miltijugate, according as there are one, two, or many pairs of leaflets.