deciduous (1 image): falling after completion of the normal function.

declined: curved downward.

decompound: repeatedly compound.

decumbent: with a prostrate or curved base and an erect or ascending tip.

decurrent (1 image): with an adnate wing or margin extending down the stem or axis below the point of insertion.

decussate (2 images): arranged oppositely, with each succeeding pair set at right angles to the previous pair.

deflexed (1 image): bent downward.

dehiscent (3 images): opening at maturity.

deliquescent: irregularly branched pattern lacking a central axis.

deltoid: shaped more or less like an equilateral triangle.

dendritic: branched in treelike fashion, as the hairs of some Brassicaceae.

dentate (1 image): with spreading, pointed teeth.

denticulate: diminutive of dentate.

denticle: small, toothlike appendage or projection.

depauperate: imperfectly or not fully developed.

determinate inflorescence: one in which the terminal flower blooms first.

diadelphous: connate into 2 groups.

dichasial cyme: a cyme that is repeatedly branched in dichasial fashion.

dichasium: a 3-flowered cymule in which development of the terminal flower is followed by that of the 2 opposite or subopposite lateral flowers.

dichotomous: forking more or less regularly into 2 branches of approximately equal size.

didymous: developing in pairs.

didynamous: with 4 stamens in 2 unequal pairs.

digitate: with 3-more lobes, nerves, leaflets or branches arising from a common point; same as palmate.

dimidiate: halved, as if 1 half were wanting.

dimorphic: of 2 forms.

dioecious (10 images): producing male and female flowers on separate plants.

diploid: with two sets of chromosomes.

diplostemonous: with 2 cycles of stamens.

disarticulating: separating at a pre-existing point.

disciform: with the form of a disk.

discoid (9 images): resembling a disk; in Asteraceae, with the flowers of a head all tubular and hermaphroditic flowers (or functionally male).

disk (2 images): an outgrowth from the receptacle, surrounding the base of the ovary, often derived by reduction of the innermost set of stamens; in Asteraceae, the central part of the head, composed of tubular flowers.

dissected (3 images): deeply and often repeatedly divided into many smaller or slender parts.

distal: toward or at the tip or far end.

distichous: in 2 vertical rows or ranks.

distinct: not fused (connate) with similar organs.

distylous: form of heterostyly where two style lengths are present in a population.

divaricate: widely spreading from the axis.

divided: cut into distinct parts, as a leaf that is cut to the midrib or the base.

dolabriform (1 image): pick-shaped, attached more or less toward the middle.

dorsal: pertaining to or located on the back.

dorsifixed: attached by the back.

dorsiventral: flattened, with the 2 flattened sides unlike.

dorsoventral: from the front to the back, as opposed to from one side to another; also used as a synonym of dorsiventral.

drupe (3 images): fleshy fruit with a firm endocarp that permanently encloses the generally solitary seed, or with a portion of the endocarp separately enclosing each of 2 or more seeds.

drupelet (1 image): diminutive of drupe.