Capituleseences terminal, laxly racemose to
corymbose, on long peduncles; capitula pedunculate, heterogamous, disciform; receptacle epaleate; involucre uniseriate.
Racemes many flowered, lax, ebracteate, corymbose, elongated considerably in fruit; fruiting pedicels slender, ascending, divaricate, strongly recurved or reflexed.
Racemes corymbose, elongated considerably in fruit; fruiting pedicels 6-12 mm long, divaricate, straight, glabrous.
Fruiting raceme corymbose, hardly elongated in fruit; leaves glabrous; Buenos Aires M.
Capitulescences
corymbose, two- to 18-headed; capitula long-pedunculate, heterogamous, radiate; receptacle epaleate; involucre multiseriate, three- to six-seriate.
Capitulescences corymbose; capitula pedunculate, homogamous, bilabiate; receptacle epaleate; involucre multiseriate, outermost phyllaries decurrent onto the stalk.
Capitulescences monocephalous, laxly to densely corymbose, racemose, paniculate to glomemlose or pseudocephalia.
Capitulescences densely corymbose; capitula short-pedunculate, homogamous, discoid; receptacle paleate, paleae embracing the marginal florets; involucre multiseriate.
Capitulescences racemose to corymbose; capitula pedunculate, homogamous, discoid; receptacle epaleate; involucre one- to three-seriate.
Capitulescences racemose, corymbose, spicate to paniculate; capitula unisexual or bisexual, sessile to subsessile, discoid; receptacle epaleate; involucre multiseriate.
Capitulescences monocephalous or two- to five-headed, corymbose to paniculate; capitula pedunculate, homogamous, discoid; receptacle epaleate; involucre multiseriate.
Inflorescence terminal or rarely axillary, usually
corymbose or umbellate; bracts present, usually as perulae (except Therorhodion where bracts are green), bracteoles paired, usually [+ or -] basal; calyx articulated with pedicel or not.