Burke: Packera streptanthifolia vs. Packera paupercula

	Packera streptanthifolia	Packera paupercula
	Rocky Mountain butterweed, cleftleaf groundsel, Rocky Mountain groundsel	Canadian butterweed, balsam groundsel
Habit	Glabrous, fibrous-rooted perennial from a short, woody base or rhizome, 1-5 dm. high.	Fibrous-rooted perennial from a short, simple crown, the stem 1-5 dm. tall, lightly woolly when young, soon glabrate except for the leaf axils.
Leaves	Somewhat succulent, the basal ones with long petioles and mostly elliptic or sub-rotund blade, with course, rounded teeth or entire; cauline leaves few and reduced, becoming sessile on the upper stem but not clasping, about twice as long as wide, usually somewhat coarsely lobed toward their bases.	Basal leaves long-petiolate, the blade oblanceolate to elliptic, sub-entire to serrate with rounded teeth; cauline leave alternate, more or less pinnatifid, the lower petiolate and as large as the basal, reduced upward and becoming sessile, all thin and not succulent.
Flowers	Heads several, involucres 5-7 mm. high; rays 6-12 mm. long, yellow.	Heads several, the disk 5-12 mm. wide; involucre 6-9 mm. high; rays yellow, 5-10 mm. long.
Fruits		Achene

	Packera streptanthifolia	Packera paupercula
Flowering time	May-August	May-October
Habitat	Moist to moderately dry open areas and forest, from middle elevations to the subalpine.	Meadows, moist cilffs and woods, from the foothills to middle elevations in the mountains.
Distribution	Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains and Sasketchewan. [WildflowerSearch map] [BONAP county map]	Occurring east of the Cascades crest in Washington British Columbia to Washington, east to the Rocky Mountains, northern Great Plains, and eastern North America. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	P. bolanderi, P. cana, P. contermina, P. flettii, P. indecora, P. macounii, P. pauciflora, P. paupercula, P. porteri, P. pseudaurea, P. subnuda	P. bolanderi, P. cana, P. contermina, P. flettii, P. indecora, P. macounii, P. pauciflora, P. porteri, P. pseudaurea, P. streptanthifolia, P. subnuda
Web links	Local floras: BC, OR, WA Local Web sites: 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	Local floras: BC, WA Local Web sites: 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

Packera streptanthifolia

Packera paupercula

Rocky Mountain butterweed, cleftleaf groundsel, Rocky Mountain groundsel

Canadian butterweed, balsam groundsel

Habit

Glabrous, fibrous-rooted perennial from a short, woody base or rhizome, 1-5 dm. high.

Fibrous-rooted perennial from a short, simple crown, the stem 1-5 dm. tall, lightly woolly when young, soon glabrate except for the leaf axils.

Leaves

Somewhat succulent, the basal ones with long petioles and mostly elliptic or sub-rotund blade, with course, rounded teeth or entire;

cauline leaves few and reduced, becoming sessile on the upper stem but not clasping, about twice as long as wide, usually somewhat coarsely lobed toward their bases.

Basal leaves long-petiolate, the blade oblanceolate to elliptic, sub-entire to serrate with rounded teeth;

cauline leave alternate, more or less pinnatifid, the lower petiolate and as large as the basal, reduced upward and becoming sessile, all thin and not succulent.

Flowers

Heads several, involucres 5-7 mm. high;

rays 6-12 mm. long, yellow.

Heads several, the disk 5-12 mm. wide;

involucre 6-9 mm. high;

rays yellow, 5-10 mm. long.

Fruits

Achene

Packera streptanthifolia

Packera paupercula

Flowering time

May-August

May-October

Habitat

Moist to moderately dry open areas and forest, from middle elevations to the subalpine.

Meadows, moist cilffs and woods, from the foothills to middle elevations in the mountains.

Distribution

Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains and Sasketchewan.

[WildflowerSearch map]

[BONAP county map]

Occurring east of the Cascades crest in Washington British Columbia to Washington, east to the Rocky Mountains, northern Great Plains, and eastern North America.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa