Coroniform. Shaped like a crown.
Corrugate. Wrinkled or in folds.
Corymb. A flat-topped or convex open flower-cluster, in the stricter use of the word equivalent to a contracted raceme and progressing in its flowering from the margin inward.
Corymbose. In corymbs, or corymb-like.
Cosmopolite. Found in most parts of the globe (of plants).
Costa. A rib; a midrib or mid-nerve.
Costate. Ribbed; having one or more longitudinal ribs or nerves.
Cotyledons. The foliar portion or first leaves (one, two, or more) of the embryo as found in the seed.
Crateriform. In the shape of a saucer or cup, hemispherical or more shallow.
Creeping. Running along or under the ground and rooting.