Senecio hydrophilus

Nuttall

Trans. Amer. Philos. Soc., n. s. 7: 411. 1841.

Endemic
Synonyms: Senecio hydrophilus var. pacificus Greene
Treatment appears in FNA Volume 20. Treatment on page 557. Mentioned on page 547.

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.


Phenology: Flowering spring–early summer.
Habitat: Marshes, swampy places, standing water, alkaline sites
Elevation: (0–)200–2500 m

Distribution

V20-1236-distribution-map.gif

B.C., Calif., Colo., Idaho, Mont., Nev., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Senecio hydrophilus"
Theodore M. Barkley† +
Nuttall +
B.C. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
(0–)200–2500 m +
Marshes, swampy places, standing water, alkaline sites +
Flowering spring–early summer. +
Trans. Amer. Philos. Soc., n. s. +
Senecio hydrophilus var. pacificus +
Senecio hydrophilus +
species +