OregonFlora: Packera breweri vs. Packera flettii

	Packera breweri	Packera flettii
		Flett's groundsel
Habit		Plants perennial, 10–40+ cm; rhizomes horizontal to erect.
Stems		1 or 2–5, loosely clustered, glabrous or leaf axils sparsely pubescent.
Basal leaves		blades obovate to ovate or sub-lyrate, bases tapering; margins deeply dissected or pinnatifid, crenate to crenate-dentate, petiolate.
Cauline leaves		lower similar to basal; middle and upper absent or abruptly reduced distally, sessile.
Involucres		campanulate to broadly cylindric.
Ray florets		5 or 8; rays 5–10 mm.
Disc florets		20–30+; corolla tubes 2.5–3.5 mm; limbs 2.5–3.5 mm.
Phyllaries		(8)13, 4–7 mm, light green; tips yellowish; surfaces glabrous.
Calyculi		0 or inconspicuous.
Fruits		1–1.5 mm, glabrous; pappi 4–4.5 mm.
Heads		4–10+; in subumbellate; cyme-like arrays, radiate; peduncles glabrous; bracts absent or inconspicuous.
2n		=40.

	Packera breweri	Packera flettii
Distribution	[WildflowerSearch map] [BONAP county map]	[WildflowerSearch map] [BONAP county map]
Discussion		Exposed slopes, rocky or gravelly soils. Flowering Jun–Jul. 300–1100 m. CR. WA. Native. In Oregon, P. flettii is known only from the Coast Range and is rarely collected there. It is also rare in Washington but has a much wider distribution. This species has a unique chromosome number for the genus (2n=40) and is not known to hybridize with other species.
Source		Flora of Oregon, volume 2, page 322 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. hesperia, P. macounii, P. porteri, P. pseudaurea, P. streptanthifolia, P. subnuda
Synonyms		Senecio flettii
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: 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

Packera breweri

Packera flettii

Flett's groundsel

Habit

Plants perennial, 10–40+ cm; rhizomes horizontal to erect.

Stems

1 or 2–5, loosely clustered, glabrous or leaf axils sparsely pubescent.

Basal leaves

blades obovate to ovate or sub-lyrate, bases tapering;

margins deeply dissected or pinnatifid, crenate to crenate-dentate, petiolate.

Cauline leaves

lower similar to basal; middle and upper absent or abruptly reduced distally, sessile.

Involucres

campanulate to broadly cylindric.

Ray florets

5 or 8;

rays 5–10 mm.

Disc florets

20–30+;

corolla tubes 2.5–3.5 mm;

limbs 2.5–3.5 mm.

Phyllaries

(8)13, 4–7 mm, light green;

tips yellowish;

surfaces glabrous.

Calyculi

0 or inconspicuous.

Fruits

1–1.5 mm, glabrous;

pappi 4–4.5 mm.

Heads

4–10+; in subumbellate; cyme-like arrays, radiate;

peduncles glabrous;

bracts absent or inconspicuous.

=40.

Packera breweri

Packera flettii

Distribution

[WildflowerSearch map]

[BONAP county map]

[WildflowerSearch map]

[BONAP county map]

Discussion

Exposed slopes, rocky or gravelly soils. Flowering Jun–Jul. 300–1100 m. CR. WA. Native.

In Oregon, P. flettii is known only from the Coast Range and is rarely collected there. It is also rare in Washington but has a much wider distribution. This species has a unique chromosome number for the genus (2n=40) and is not known to hybridize with other species.

Source

Flora of Oregon, volume 2, page 322
Debra Trock

Sibling taxa