Compound. Composed of two or more similar parts united into a whole. Compound leaf, one divided into separate leaflets.
Cone. A fruit with woody, overlapping scales.
Conical. Cone-shaped, largest at the base and tapering to the apex.
Connective. The portion of a stamen which connects the two cells of the anther.
Cordate. Heart-shaped. Page XII.
Coriaceous. Leather-like in texture.
Corky. Made of, or like cork.
Corolla. The inner part of a perianth, usually bright colored. Page XIII.
Corymb. A flower-cluster in which the axis is shortened and the pedicels of the lower flowers lengthened, forming a flat-topped inflorescence, the marginal flowers blooming first. Page XIV.
Corymbose. Arranged in corymbs.
Crenate. Dentate, with the teeth much rounded. Page XIII.
Crenulate. Finely crenate.
Crown. The upper part of a tree, including the living branches with their foliage.
Cutting. A piece of the stem, root or leaf which, if cut off and placed in contact with the soil, will form new roots and buds, reproducing the parent plant.
Cyme. A broad and flattish inflorescence, the central flowers of which bloom first. Page XIV.
Cymose. Arranged in cymes.
Deciduous. Not persistent; falling away, as the leaves of a tree in autumn.
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.
Divergent. Said of buds, cones, etc., which point away from the twig, or of pine needles, etc., which spread apart.
Michigan Trees: a Handbook of the Native and Most Important Introduced Species · The Wunder Library — complete classics, free to read, with narration.