Chrysanthemum leucanthemum
 
Ox-Eye Daisy

Lower Half of Plant

Duck Mountain Provincial Park
07-July-2006

Note that the key to the genera in Budd's Flora requires:

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leaves entire; NOT [leaves much divided into narrow segments]

In fact, the leaves are entire to crenate-serrate to lobed.

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Leucanthemum: Answers to key questions in Budd's Flora leading to this species. 
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leaves petiolate below, with the middle and upper stem leaves sessile; NOT [leaves long, wedge-shaped, tapering into the petiole]

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heads with ray florets; NOT [heads with tubular florets only]

 

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

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plants NOT scented; NOT [plants usually somewhat scented]

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juice watery; NOT milky

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leaves alternate or basal; NOT [leaves opposite]

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NOT [basal leaves mostly 1-6 cm long, linear to oblanceolate or spatulate, forming a dense rosette] (FOA)

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leaves entire; NOT [leaves much divided into narrow segments] (BF)

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leaves oblanceolate, crenate-serrate to lobed; NOT [leaves pinnately dissected or linear with margins serrulate or pectinate] (FOA)

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heads solitary on stem; NOT [heads several to a stem]

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heads 25-50 mm across; NOT [heads less than 25 mm across]

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flower heads with both tubular and ray florets

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ligulate florets pistillate or neuter; NOT [ligulate florets perfect]

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ray florets white

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receptacle naked, without chaffy scales

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stamens united to form a tube around the pistil

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pappus a short crown or none; NOT [pappus composed of numerous hairs]; NOT [pappus composed of bristly scales or with 2-4 slender bristles]