Calyx - The outer part of a flower, usually consisting of green, leafy sepals.
Capsule - A dry, many-seeded, spontaneously splitting fruit that arises from a compound pistil.
Carpel - The wall of a simple pistil, or part of the wall of a compound pistil.
Catkin - A spike-like flower cluster that bears scaly bracts and petal-less, unisexual flowers.
Cauline - Relating to or growing on a stem.
Clasping - Partly or completely surrounding the stem.
Claw - The narrow, curved base of a petal or sepal in some flowers.
Compound - Made up of two or more definable parts.
Compound Pistil - A pistil made up of two or more partially or completely united carpals.
Cone - A rounded, more or less elongated cluster of fruits or flowers covered with scales or bracts.
Cordate - Heart-shaped, with the pint at the apex.
Corm - A bulb-like but solid, fleshy underground stem base.
Corolla - The petals of a flower, which may be separate or joined in varying degrees.
Corymb - A generally flat-topped flower cluster with pedicels varying in length, the outer flowers opening first.
Creeper - A shoot that grows along the ground, rooting all along its length.
Crenate - Having rounded teeth along the margin.
Culm - The hollow stem of grasses and bamboos.
Cyme - A branching, relatively flat-topped flower cluster whose central or terminal flower opens first, forcing development or further flowers from lateral buds.
Deciduous - Falling off each season (as leaves); bearing deciduous parts (as trees).
Decompound - Having divisions that are also compound.
Decumbent - Lying on the ground but having an ascending tip.
Decurrent - Descriptive of leaves whose edges run down onto the stem.
Dentate - Sharply toothed, with the teeth pointing straight out from the margin.
Digitate - Compound, with the elements growing from a single point.
Dilated - Expanded, broadened, flaring.
Disk Flower - One of the tubular flowers or florets in the centre of the flower head of a composite flower such as the daisy. (see also ray flower).
Dissected - Cut into fine segments.
Double - Descriptive of the flowers that have more petals than normal.]
Doubly Serrate - Serrate, with small teeth on the margins of the larger ones.
Drupe - A fleshy fruit containing a single seed in a hard stone. (e.g. peach).