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APPW key feature pages

Asteraceae only - floret composition

The inflorescenceinflorescence:
(n) the arrangement of flowers on the floral axis
in the family Asteraceae is a flower headhead:
(n) inflorescence consisting of small closely packed stalkless flowers or florets arising at the same level on a flattened axis; of several types, including: discoid (composed entirely of disk flowers) and radiate (composed of central disk flowers and marginal ray flowers)
composed of many individual florets. Some species have flower heads containing two types of florets—both disc and ray florets, while others have only ray florets or only disc florets. In this tool, species with only one type of florets have disc florets.

both disc and ray florets  
both disc and ray florets
disc florets only  
disc florets only
APPW key feature pages