(from the article `Asterales`) ...type is the discoid head, with all the flowers having a regular, tubular corolla, the generally four or five apical teeth representing the tips of ... ...sunflowers, Helianthus annuus), for instance, the outer (or ray) flowers have a well-developed zygomorphic corolla, and the inner (disk) flowers ... ...
Found on
http://www.britannica.com/eb/a-z/d/56
One of the tubular flowers or florets in the center of the flower head of a composite flower such as the daisy.
Found on
http://www.encyclo.co.uk/local/20901
one of a number of small tubular flowers composing the disk of certain composite plants. Also calledCf. ray flower.
Found on
https://www.infoplease.com/dictionary/disk-flower
No exact match found.
