Artemisia absinthium
 
Absinthe

Upper Quarter of Stem

4 km North-West of Craven
13-August-2014

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Absinthium: Answers to key questions in Budd's Flora and Flora of Alberta leading to this species. 
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herbs or subshrubs with bases not woody and branches usually herbaceous; NOT [shrubs with woody bases and branches]

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plants hairy, silky, or woolly; NOT  [plants glabrous or nearly so]

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stem-leaves deeply and narrowly dissected; NOT [stem-leaves entire to coarsely lobed or toothed] 

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leaves only once or twice divided; NOT [leaves 2 or 3 times divided]

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leaf-divisions wider, mostly 2-3 mm wide;  NOT [leaf-divisions narrow-filiform, about 1 mm wide]

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leaf-lobes rounded; NOT [leaf-lobes acute]

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margin of leaves entire; NOT [margin of leaves serrate]

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leaves greyish green; NOT [leaves green]

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leaves hairy or silky hairy, but not woolly; NOT [leaves white woolly, at least on underside] (BF)

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leaves tomentose at least below; NOT [leaves essentially glabrous] (FOA)

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heads erect; NOT [heads nodding] (FOA)

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heads 2-3 mm wide; NOT [heads 3-5 mm wide], NOT [heads large, 6-10 mm across]

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involucral bracts 1-2 mm long; NOT [involucral bracts 2-3 mm long]

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receptacular hairs present between the disc-florets; NOT [receptacular hairs absent]

 

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Artemisia: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus. 
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herbs; NOT [low grayish shrubs, with linear leaves]

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juice watery; NOT [juice milky]

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NOT [plants annual, woolly or glandular; leaves opposite, at least below, linear-lanceolate, 1-6 mm wide, entire]

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leaves alternate; NOT [most of the leaves opposite]

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basal leaves either absent, or of distinctly different shape or not woolly below; NOT [basal leaves triangular-ovate to subreniform, white-woolly below]

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leaves lobed or divided; NOT [leaves linear-elliptic], NOT [leaves large, deltoid-ovate]

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leaves without spiny-tipped teeth

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flowers appearing after the leaves; NOT [flowers appearing before the large felty-pubescent leaves]

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inflorescence paniculate, spicate or racemose; NOT [inflorescence corymbose]

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inflorescence not glandular; NOT [inflorescence glandular sticky]

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heads numerous

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heads not over 5 mm across

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involucral bracts usually more numerous; NOT [involucral bracts 4-5]

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bracts of involucre not dry or parchmenty, usually green; NOT [bracts of involucre dry, parchmenty or membranous, not green]

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involucral bracts not petaloid; NOT [involucral bracts with yellowish, more or less petaloid, scarious tips]

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involucral bracts not spiny-tipped

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involucral bracts without hooked bristles

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receptacle naked or merely hairy; NOT [receptacle chaffy]

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flower heads with all florets tubular

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florets yellow or greenish yellow; NOT [florets purplish white, purple, or rose]

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stamens united  to form a tube around the pistil

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pappus none or inconspicuous; NOT [pappus present, distinct]