| Name | Structure/ Category | Description |
|---|---|---|
| Crumpled | wrinkled, creased, or bent out of shape by or as if by pressing, folding, or crushing | |
| Culm | the jointed stem of a grass usu. hollow except at the often swollen nodes and usu. herbaceous except in the bamboos and other arborescent grasses; also one of the solid stems of sedges, rushes, and similar monocotyledonous plants | |
| Cuneate | [Leaf bases, Leaflet bases] {shape} | Wedge-shaped and tapering to a point at the base. |
| Cupule | A cup-like structure at the base of some fruits, such as the acorns of oaks (Quercus), composed of a persistent, usually dried, whorl of bracts (involucre) or other sterile floral parts, that are often partially fused. | |
| Cyathium | [Inflorescences] {type} | An inflorescence consisting of a single, naked, terminal pistillate flower with several tiny, naked, lateral staminate flowers, the whole more or less enclosed by a cuplike whorl of bracts (involucre) and resembling a single flower; as in poinsettias (Euphorbia). |
| Cylindric | [Buds] {shape} , [Seed cones] {shape before opening, shape when open} | Rounded in cross section with a more or less uniform diameter and blunt ends; cylinder-shaped. |
| Cyme | [Inflorescences] {type} | Generally, a determinate, compound, and frequently more or less flat-topped inflorescence; the basic cymose unit is a three-flowered cluster composed of a main stalk bearing a terminal flower and below it, two stalked, lateral flowers, each with a reduced leaf or bract at the base. |
| Cymose | In the form of a simple or compound cyme; bearing cymes. | |
| Cypsela | [Fruits] {type} | A dry, one-seeded fruit that does not split open at maturity (indehiscent), with persistent perianth tissue (pappus) attached at the top, as in some members of the Asteraceae. |
| Deciduous | (1) [Leaves] {duration} | Falling at the end of one growing season, as the leaves of non-evergreen trees; not evergreen. (Compare with evergreen and semi-evergreen.) |
