Burke: Senecio flaccidus vs. Senecio hydrophiloides

	Senecio flaccidus	Senecio hydrophiloides
		sweet marsh butterweed, stout meadow groundsel
Habit		Glabrous but scarcely glaucous, fibrous-rooted perennial from a short crown, 3-10 dm. tall, the stems solitary or more commonly clustered.
Leaves		Somewhat succulent, sharply dentate, the basal and lowermost cauline ones petiolate, with elliptic or broadly oblanceolate blades 6-25 cm. long and 2-7 cm. wide; upper leaves few, strongly reduced, becoming sessile toward the upper stem.
Flowers		Heads fairly numerous in a congested inflorescence; involucre 6-9 mm. high, the bracts often black-tipped; rays typically about 5, up to about 8 mm. long, frequently wanting.

	Senecio flaccidus	Senecio hydrophiloides
Flowering time		May-July
Habitat		Wet meadows in the mountains and foothills, but not in alkali.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, Wyoming, and Utah. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		Not of concern
Sibling taxa	S. elmeri, S. fremontii, S. hydrophiloides, S. hydrophilus, S. integerrimus, S. lugens, S. neowebsteri, S. serra, S. sylvaticus, S. triangularis, S. viscosus, S. vulgaris	S. elmeri, S. fremontii, S. hydrophilus, S. integerrimus, S. lugens, S. neowebsteri, S. serra, S. sylvaticus, S. triangularis, S. viscosus, S. vulgaris
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Senecio flaccidus

Senecio hydrophiloides

sweet marsh butterweed, stout meadow groundsel

Habit

Glabrous but scarcely glaucous, fibrous-rooted perennial from a short crown, 3-10 dm. tall, the stems solitary or more commonly clustered.

Leaves

Somewhat succulent, sharply dentate, the basal and lowermost cauline ones petiolate, with elliptic or broadly oblanceolate blades 6-25 cm. long and 2-7 cm. wide; upper leaves few, strongly reduced, becoming sessile toward the upper stem.

Flowers

Heads fairly numerous in a congested inflorescence;

involucre 6-9 mm. high, the bracts often black-tipped;

rays typically about 5, up to about 8 mm. long, frequently wanting.