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Senecio have alternate leaves,
either hairy or hairless
Flowerheads have few ray florets with spaces between them
Flowerheads have involucral bracts in one equal row
Fruits have hairy tufts
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Guide to Identify Presented Species of Genus Senecio
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FLOWERS YELLOW
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S.
fremontii - Rock
Groundsel
Plant about 10 cm tall, branching, in clumps. Rocky places, high elevations.
Flowerheads with 6-8 rays, 6-10
mm long. Rays and disc florets bright yellow.
Leaves alternate, somewhat
succulent, spoon-shaped, hairless, toothed. |
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S.
integerrimus - Western
Groundsel
Stems 20-70 cm tall, stout, erect, single. Plains to subalpine zone.
Flowerheads several in congested cluster. Involucre with black-tipped bracts.
Basal leaves thickish, lance-shaped.
Stem leaves alternate, few and small. |
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S.
triangularis - Arrow-leaved
Groundsel
Stems stout, unbranched, leafy, 30-150 cm tall. Moist places, mountains.
Flowerheads in a short cluster, with about 8 yellow rays 7-13 mm long.
Leaves alternate, elongate-triangular, stalked, sharp-toothed,
nearly hairless. |
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