Ratibida: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 

	juice watery; NOT [juice milky]
	NOT [plants with a woody caudex; leaves linear; involucre glandular-glutinous]
	NOT [plants glandular-hairy, heavily scented annuals; rays 1-3, inconspicuous]
	plants with leafy stems; NOT [plants more or less scapose, cauline leaves none, or few and reduced to bracts]
	leaves alternate; NOT [leaves opposite, at least the lower]
	plants with pinnately divided leaves; NOT [plants with entire, undivided leaves]
	involucral bracts in one or more series, all more or less the same; NOT [involucral bracts of 2 distinct, dissimilar series]
	receptacle cylindrical and tall; NOT [receptacle flat to hemispherical]
	receptacle with chaffy scales between florets; NOT [receptacle bristly], NOT [receptacle naked]
	flower heads with both tubular florets and ray florets
	rays 3-7; NOT [rays 8-30]
	rays entirely yellow; NOT [rays crimson-purple at base]
	ligulate flowers when present pistillate or neuter; NOT [ligulate flowers perfect]
	stamens united to form a tube around the pistil
	pappus chaffy or of firm awns, or a crown or none; NOT [pappus wholly or partly of capillary bristles, sometimes plumose] (FOA)