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Senecio sphaerocephalus
Greene
Family:
Asteraceae
Mountain-Marsh Ragwort
[
Senecio altus
,
more
Senecio latus
]
FNA
Resources
Theodore M. Barkley+ in Flora of North America (vol. 20)
Perennials,
(30-)40-80 cm (rhizomes stout).
Herbage
tomentose, unevenly glabrescent.
Stems
single.
Leaves
reduced distally; petiolate; blades oblanceolate to elliptic, 4-12× 1-4 cm, bases tapered, margins weakly dentate or denticulate (denticles callous; mid leaves similar, smaller; distal leaves bractlike).
Heads
(3-)5-24 in corymbiform arrays.
Calyculi
of 1-5 bractlets (longest 2-3 mm).
Phyllaries
(± 13) ± 21, 3-7 mm, tips black or brownish.
Ray florets
± 13; corolla laminae 6-10 mm.
Cypselae
usually hairy, sometimes glabrous.
2
n
= 40.
Flowering spring-early summer. Open meadows, especially in coniferous associations; 1000-1800 m; Idaho, Mont., Nev., Oreg., Utah, Wyo.
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