Capitula homogamous or heterogamous, discoid, disciform, ligulate, or radiate, isomorphic or heteromorphic with dimorphic, sub-dimorphic, or rarely with trimorphic florets, with one to numerous florets; receptacle epaleate to paleate
, glabrous, pilose, setose to fimbriate; involucre uniseriate to multiseriate.
Capitulescences densely corymbose; capitula short-pedunculate, homogamous, discoid; receptacle paleate, paleae embracing the marginal florets; involucre multiseriate.
From the Greek pleos, plenty, full, filled, and karphos, any small dry body, in reference to the receptacle completely paleate.
Capitulescences densely paniculate; capitula sessile to shortly pedunculate, homogamous, discoid; receptacle paleate, paleae embracing all the florets; involucre uniseriate.
Capitulescences a corymbose pseudocephalium; capitula shortly-pedunculate, homogamous, discoid, with two florets, rarely three, surrounded by an involucre of five phyllaries: four enclosing one floret and one enclosing the other floret or all florets, the phyllary between florets interpreted as a palea; receptacle paleate.
100 flowers; involucre multiseriate, the series graduate; receptacle paleate, partially paleate to epaleate.