… the combined display of all the petals of a flower
corymb
… a flat(ish)-topped flower cluster in which the individual stalks grow upward from various points on the main stem to approximately the same height.
cushion
… a plant with a compact,close-to-the-ground form, often forming mats. Generally found in alpine, subalpine and tundra environments.
cushion plant
… a compact, low-growing, mat-forming plant that is found in alpine, subalpine, arctic, or subarctic environments. “Low growing” means inches, not feet.
cyanogenic glycoside
… a compound consisting of a sugar molecule linked to a cyanide molecule. They are produced by a plant and stored in leaf vacuoles, and the cyanide is released by an enzyme if the enclosing cell is broken, as by a chomping insect.
cyme

… a flower cluster with a central stem and a single terminal flower that develops first. That is followed by the others in the cluster, each from a terminal bud of a lateral stem.
dikaryotic
… a cell containing two nuclei.
dioecious
… having distinct male and female plants and requiring two parents for reproduction. Opposite is monoecious.
disc florets
… in the Asteraceae/Compositae, these are the small flowers that make up the central part of the “flower” (head-type inflorescence). They are typically less dramatic than ray florets.
drupe
… a type of fruit in which an outer fleshy part surrounds a shell (the pit) with a seed inside. Examples include peaches, plums, and cherries—but walnuts, almonds, and pecans are also drupes.