A regular tubular flower in the head of species of the Sunflower family (Asteraceae).
In Compositae, the tubular flowers of the head, as distinct from the ray.
The tubular flower in the center of the usual Compositae inflorescence.
One of the tubular flowers or florets in the center of the flower head of a composite flower such as the daisy (see also ray flower ).
In Asteraceae, the tubular flowers that usually make up the central portion of the head.