Involucellate, furnished with an involucel. Involucrate, furnished with an involucre.
Involucre, a whorl or set of bracts around a flower, umbel, or head, &c., [74], [75].
Involute, in vernation, [72]; rolled inwards from the edges, [97].
Irregular Flowers, [86], [91].
Isos, Greek for equal in number. Isomerous, the same number in the successive circles or sets. Isostemonous, the stamens equal in number to the sepals or petals.
Jointed, separate or separable at one or more places into pieces, [64], &c.
Jugum (plural Juga), Latin for a pair, as of leaflets,—thus Unijugate, of a single pair; Bijugate, of two pairs, &c.
Julaceus, like a catkin or Julus.
Keel, a projecting ridge on a surface, like the keel of a boat; the two anterior petals of a papilionaceous corolla, [92].
Keeled, furnished with a keel or sharp longitudinal ridge.