Practice question

Capitulum or head is highly condensed racemose inflorescence where numerous sessile florets crowd onto flattened or convex receptacle surrounded by involucre of protective bracts, functioning as single flower-like pseudanthium. It is hallmark of Asteraceae Compositae incorporating outer ray and inner disc florets, also sporadically in Mimosa but typical family diagnostic. Poaceae bears spikelet with glumes lemma palea, Fabaceae simple raceme, Liliaceae solitary or raceme. Capitulum's adaptive value lies in enhanced pollinator attraction mass display, protection of central florets and synchronized maturation leading to mass cypsela fruit set with pappus for dispersal.