OregonFlora: Packera breweri vs. Packera macounii

	Packera breweri	Packera macounii
		long-rayed groundsel, Puget butterweed, Siskiyou Mountains ragwort
Habit		Plants perennial, 30–40+ cm; taprooted, caudices ± branching, becoming rhizomatous.
Stems		1, sparsely to densely tomentose or glabrate.
Basal leaves		blades narrowly lanceolate to oblanceolate, bases tapering; margins entire or shallowly toothed, slightly revolute, petiolate.
Cauline leaves		gradually reduced; upper bract-like; lower petiolate; upper sessile.
Involucres		cylindric to narrowly campanulate.
Ray florets		8(13); rays 8–10+ mm.
Disc florets		30–40+; corolla tubes 2.5–3.5 mm; limbs 2–3 mm.
Phyllaries		13 or 21, 5–7+ mm, green; surfaces glabrous.
Calyculi		0 or inconspicuous.
Fruits		3–4.5 mm, glabrous; pappi 4–5 mm.
Heads		6–15+; in corymb-like arrays; peduncles sparsely tomentose to glabrate; bracts absent or inconspicuous.
2n		=46, 92.

	Packera breweri	Packera macounii
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Streams, roadsides, clearings, disturbed areas, coniferous woodlands in rocky soils, serpentine. Flowering Apr–Jul. 50–1400 m. Casc, CR, Est, Lava, Sisk, WV. CA, WA; north to British Columbia. Native. Packera macounii is similar in overall morphology to P. cana. However, its leaves are narrower and commonly revolute. Although it is often cited as being collected on serpentine soils, it is not restricted to them.
Source		Flora of Oregon, volume 2, page 323 Debra Trock
Sibling taxa	P. bolanderi, P. cana, P. eurycephala, P. flettii, P. hesperia, P. macounii, P. porteri, P. pseudaurea, P. streptanthifolia, P. subnuda	P. bolanderi, P. cana, P. eurycephala, P. flettii, P. hesperia, P. porteri, P. pseudaurea, P. streptanthifolia, P. subnuda
Synonyms		Senecio fastigiatus, Senecio macounii
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

Packera breweri

Packera macounii

long-rayed groundsel, Puget butterweed, Siskiyou Mountains ragwort

Habit

Plants perennial, 30–40+ cm; taprooted, caudices ± branching, becoming rhizomatous.

Stems

1, sparsely to densely tomentose or glabrate.

Basal leaves

blades narrowly lanceolate to oblanceolate, bases tapering;

margins entire or shallowly toothed, slightly revolute, petiolate.

Cauline leaves

gradually reduced;

upper bract-like; lower petiolate; upper sessile.

Involucres

cylindric to narrowly campanulate.

Ray florets

8(13);

rays 8–10+ mm.

Disc florets

30–40+;

corolla tubes 2.5–3.5 mm;

limbs 2–3 mm.

Phyllaries

13 or 21, 5–7+ mm, green;

surfaces glabrous.

Calyculi

0 or inconspicuous.

Fruits

3–4.5 mm, glabrous;

pappi 4–5 mm.

Heads

6–15+; in corymb-like arrays;

peduncles sparsely tomentose to glabrate;

bracts absent or inconspicuous.

=46, 92.

Packera breweri

Packera macounii

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Streams, roadsides, clearings, disturbed areas, coniferous woodlands in rocky soils, serpentine. Flowering Apr–Jul. 50–1400 m. Casc, CR, Est, Lava, Sisk, WV. CA, WA; north to British Columbia. Native.

Packera macounii is similar in overall morphology to P. cana. However, its leaves are narrower and commonly revolute. Although it is often cited as being collected on serpentine soils, it is not restricted to them.

Source

Flora of Oregon, volume 2, page 323
Debra Trock

Sibling taxa