imbricate
Overlapping.
imbricating
Overlapping.
imparipinnate
Odd–pinnate, a leaf shape; pinnate with a single leaflet at the apex.
inbreeding
Genetic similarity in offspring of closely related individuals.
incoherent
Not sticking together.
incursion
Entrance of a pest into an area where it is not present.
indumentum
A covering of fine hairs (or sometimes scales).
indusia
Plural of indusium, a membrane covering a sorus of a fern.
indusium
A thin tissue that covers the sorus in many ferns. Plural: indusia.
inflorescence
The arrangement of flowers on the stem. A flower head.
infundibuliform
Funnel–like.
in-situ
On site conservation relating to the maintenance of plants in the wild.
interkeel
The space between the keel and the leaf blade.
internode
The part of an axis between two nodes; the section of the stem between leaves.
internodes
Part of a stem between two nodes.
intramarginal
Within or near the margin.
involucral bracts
The scales surrounding the flower head or capitula.
involucre
A group of bracts surrounding a flower head.
involute
With margins rolled inward toward the upper side.
irritable
Responding to touch.