From
this site here is a glossary and graphic describing flower parts in Asteraceae (- and phyllaries!)
Achene — A hard, one-seeded, indehiscent nutlet with a tight pericarp. An example is the sunflower seed in the shell (pericarp).
Biseriate — Having two series, or rows, of parts; having two rows or sets of phyllaries (bracts) on the involucre.
Claw — The narrowed base of the corolla of a ray flower.
Crown — In the Asteraceae family, scales or awns at the summit of an achene.
Disk or disc — The central portion of a capitate inflorescence, or the receptacle of such an inflorescence.
Disk flowers — The central, tubular flowers of the head. Compare ray flower.
Floret — A single small flower, usually a member of a cluster, such as a head; see disk flower and ray flower.
Head — A dense, compact cluster of mostly sessile flowers, used to describe the inflorescence in the Asteraceae family.
Imbricate — Having phyllaries (bracts) on the involucre that overlap each other like roof shingles.
Inflorescence
— The discrete flowering portion or portions of a plant; a flower cluster.
Involucre — A whorl or imbricated series of bracts, often appearing somewhat calyx-like, typically subtending the head.
Ligulate — Bearing a ligule.
Ligule — The dilated or flattened, spreading limb of the composite ray flower.
Limb — The expanded portion of a corolla above the throat; the expanded portion of any petal.
Pappus — A modification of the calyx, usually in the Asteraceae family, such that the segments appear as a low crown, a ring of scales, or fine hairs.
Peduncle — The stalk which supports a head.
Phyllary — A bract of the involucre.
Ray — A strap-shaped, ligulate, typically marginal, flower in the head of a composite inflorescence.
Ray flower — A strap-shaped, ligulate, typically marginal, flower in the head of a composite inflorescence. Also called ligulate flower. Compare to disk flower.
Receptacle — An enlarged or elongated base of a head on which the flowers are borne.
Staminal tube — The stamens of a composite flower united into a ring.
Uniseriate — Having only one series, or row, of parts; having only one row of phyllaries (bracts) on the involucre.
