Leucanthemum: Answers to key questions in Budd's Flora leading to this species. 

	leaves petiolate below, with the middle and upper stem leaves sessile; NOT [leaves long, wedge-shaped, tapering into the petiole]
	heads with ray florets; NOT [heads with tubular florets only]

Chrysanthemum: Answers to key questions in Budd's Flora (BF) and Flora of Alberta (FOA) leading to this genus. 

	NOT [plants with a well-developed taproot; and either densely caespitose, seldom more than 5 cm tall, the heads sessile among the leaves, or with stout, simple stems, 5-15 (25) cm tall, heads solitary, involucres 2-4 cm wide, bracts ciliate to pectinate or fimbriate, rays blue and achenes densely pubescent, obovate to triangular] (FOA)
	plants NOT scented; NOT [plants usually somewhat scented]
	juice watery; NOT milky
	leaves alternate or basal; NOT [leaves opposite]
	NOT [basal leaves mostly 1-6 cm long, linear to oblanceolate or spatulate, forming a dense rosette] (FOA)
	leaves entire; NOT [leaves much divided into narrow segments] (BF)
	leaves oblanceolate, crenate-serrate to lobed; NOT [leaves pinnately dissected or linear with margins serrulate or pectinate] (FOA)
	heads solitary on stem; NOT [heads several to a stem]
	heads 25-50 mm across; NOT [heads less than 25 mm across]
	flower heads with both tubular and ray florets
	ligulate florets pistillate or neuter; NOT [ligulate florets perfect]
	ray florets white
	receptacle naked, without chaffy scales
	stamens united to form a tube around the pistil
	pappus a short crown or none; NOT [pappus composed of numerous hairs]; NOT [pappus composed of bristly scales or with 2-4 slender bristles]