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Water Ragwort

Senecio hydrophilus Nutt.

Description

provided by eFloras
Perennials (biennials?), 40–100(–200) cm (caudices foreshortened, roots fleshy-fibrous). Herbage (often sea-green, usually glaucous) glabrous. Stems single or 2–4 loosely clustered. Leaves progressively reduced distally; ± petiolate; blades elliptic to oblanceolate, 5–20+ × (1–)2–10 cm, bases tapered, margins denticulate or entire (mid and distal leaves sessile, bractlike). Heads 20–40(–80+) in compound corymbiform arrays. Calyculi of 2–4+ bractlets (less than 2 mm). Phyllaries ± 8 or ± 13, 5–8 mm, tips frequently black. Ray florets (0) ca. 5; corolla laminae 3–5 mm. Cypselae glabrous. 2n = 40.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 547, 557 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Synonym

provided by eFloras
Senecio hydrophilus var. pacificus Greene
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 20: 547, 557 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras