Decurrent. Said of a leaf which extends down the stem below the point of fastening.
Decussate. Alternating in pairs at right angles.
Dehiscent. Opening by valves or slits.
Deltoid. Delta-shaped.
Dentate. Toothed, with the teeth usually pointed and directed outward. Page [xiii.]
Depressed. Somewhat flattened from above.
Dichotomous. Branching regularly in pairs.
Digitate. Said of a compound leaf in which the leaflets are borne at the apex of the petiole; finger-shaped.
Dioecious. Unisexual, with staminate and pistillate flowers on different individuals.
Distribution. The geographical extent and limits of a species.