Deciduous, falling off; not persistent.

Decompound, more than once compound or divided.

Decumbent, reclining.

Decurrent, applied to a leaf when the lobes at the base extend down the sides of the stem.

Decussate, with opposite pairs at right angles to each other.

Deflexed, turned abruptly downward.

Dehiscent, splitting open to allow the contents to escape.

Deltoid, triangular, the base downward.

Dentate, toothed, the teeth pointing outward.

Denticulate, minutely dentate.

Depressed, flattened from above.

D1-, twice or two.

Diadelphous, with the filaments cohering in two sets.

Diandrous, having two stamens.

Dichotomous, forking regularly by pairs.

Dicotyledonous, having two cotyledons.

Didynamous,of stamens, when in two pairs of different lengths.

Diffuse, spreading.

Digitate, compound, the members arising from the same point.

Dioecious, of flowers when the staminate and pistillate ones are on separate plants.

Discoid, of composite flowers when ray-florets are absent.

Disk, a development of the receptacle around the base of the pistil: the central part of the head of a composite flower as distinct from the ray.

Dissected, cut up into many segments.

Dissepiment, a partition in an ovary or fruit.

Distinct, not united.

Divergent, spreading apart.

Divided, lobed to the base.

Dorsal, relating to the back of any organ.

Drupe, a fleshy fruit with the seed enclosed in a hard shell, as a plum or cherry.


Elliptical, oval.

Emarginate. slightly notched at the end. Embryo, the undeveloped plant in the seed.

Endocarp, the innermost layer of the pericarp.

Endogenous, applied to stems whose wood does not grow in rings, but in scattered bundles.

Entire, without indentations of any kind.

Epigynous, growing on the ovary.

Epiphyte, an air-plant, whose roots do not reach the ground.

Equitant, applied to such leaves as those of Iris, which are folded lengthwise, each astride of the next one within.

Erect, upright.

Excurrent, applied to stems which can be readily traced through to the top, as in Pine. Exogenous, applied to stems whose wood grows in layers or rings. Exserted, thrust out beyond the line of the enveloping organ, as stamens out of a corolla.

Extrorse, facing outward.


Fascicle, a close bundle. Fertile, applied to flowers having pistils. Fibrous, thread-like. Filament, the stalk of the stamen. Filiform, thread-shaped; long and slender. Floccose, soft-woolly. Follaceous, leaf-like. -foliate, relating to leaves. -foliolate, relating to leaflets.

Follicle, a dehiscent fruit of one carpel, splitting down one side only. Free, not growing fast to any other organ. Frond, the leaf of a Fern, and some other cryptogams. Fruit, the ripened ovary, along with any adherent part. Fugacious, falling away very early. Fusiform, spindle-shaped, thicker in the middle than at either end.