Pappus composed of scales or chaff.
Receptacle naked. Leaves in whorls 3
Receptacle naked. Leaves alternate, dissected 61
Receptacle bearing chaff among the flowers 59, 64
Pappus of 2 or few awns or teeth 53, 57, barbed in 55, 56
Pappus none, or a mere crown-like margin to the fruit 36, 68, 71
[*] 2. Flowers of two kinds in the same head.
Marginal flowers neutral and sterile, either conspicuous or inconspicuous 82
Marginal flowers pistillate and fertile.
Receptacle elongated and bearing broad chaff among the flowers 29, 30