Scales of the involucre imbricated. Leaves alternate 10, 11, 15, 17, 35
[*] 2. Pappus a circle of awns or rigid bristles (at least in the disk).
Ray yellow, awns few (2–8) 12
Ray rose-color 23
[*] 3. Pappus a circle of chaffy scales, dissected into bristles 65
[*] 4. Pappus a circle of thin chaffy scales or short chaffy bristles.
Heads several-flowered. Receptacle chaffy 60
Heads 8–10-flowered. Receptacle naked 18
Heads many-flowered. Receptacle deeply honeycombed 58
Heads many-flowered. Receptacle naked 62, 63