Senecio vulgaris

           Common Groundsel

Lower Leaf Top

Regina
29-June-2020

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Vulgaris: Answers to key questions in Budd's Flora leading to this species. 
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annual plants; NOT [perennial plants, usually with rootstocks]

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plants branching; NOT [plants with few branches]

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stems and leaves not glandular; NOT [stems and leaves densely glandular pubescent]

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flower heads few to many; NOT [flower heads solitary]

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flower heads discoid; NOT [flower heads radiate]

 
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Senecio: Answers to key questions in Budd's Flora and Flora of Alberta leading to this genus.
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juice watery; NOT [juice milky] (FOA)

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leaves alternate or basal; NOT [leaves opposite] (FOA)

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involucral bracts uniseriate, equal, narrow, commonly with a few much shorter outer ones at the base; NOT [involucral bracts either imbricate in several series, or broad and somewhat leafy, or both] (FOA)

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involucral bracts not or scarcely imbricated; NOT [involucral bracts well imbricated] (BF)

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receptacle naked (FOA)

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flower heads with florets both tubular and ray (radiate) (BF)

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ligulate flowers pistillate or neuter; NOT [flowers all perfect] (FOA)

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rays yellow; NOT [rays white, to pink, purple or blue] (FOA)

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stamens united to form a tube around the pistil (BF)

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pappus single, bristles sometimes unequal but not distinctly divided into an inner and outer series of two lengths; NOT [pappus double, bristles of the outer series inconspicuous, distinctly shorter than the inner] (FOA)

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pappus wholly or partly of capillary bristles, sometimes plumose; NOT [pappus chaffy, or of scales, or of firm awns, or a crown or none] (FOA)