The Manual of the Botany of the Northern United States / Including the District East of the Mississippi and North of North Carolina and Tennessee

by Asa Gray

Discoid. Resembling a disk. Discoid head, in Compositæ, one without ray-flowers.

Disk. A development of the receptacle at or around the base of the pistil. In Compositæ, the tubular flowers of the head as distinct from the ray.

Dissected. Cut or divided into numerous segments.

Dissepiment. A partition in an ovary or fruit.

Distichous. In two vertical ranks.

Distinct. Separate; not united, evident.

Divaricate. Widely divergent.

Divergent. Inclined away from each other.

Divided. Lobed to the base.

Dorsal. Upon or relating to the back or outer surface of an organ.