Packera cynthioides
Packera macounii
White Mountain ragwort
long-ray groundsel, Macoun's butterweed, Macoun's groundsel, Puget butterweed, Siskiyou Mountain ragwort, Siskiyou Mountains ragwort
1 or 2–3, clustered, densely lanate-tomentose or canescent, tufts of arachnoid tomentum in leaf axils, or glabrescent.
1, sparsely to densely tomentose or glabrescent.
(thick, leathery) petiolate;
blades narrowly lanceolate or oblanceolate, 25–100+ × 5–20 mm, bases tapering, margins entire, subentire, dentate, or wavy (adaxial faces early glabrescent).
(and proximal) petiolate;
blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute).
gradually reduced (sessile; lanceolate to oblanceolate, entire or wavy).
gradually reduced (distal sessile, bractlike).
0 (or relatively reduced, then densely tomentose).
inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate.
(5–)8;
corolla laminae 8–10+ mm.
8(–13);
corolla laminae 8–10+ mm.
35–45+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
30–40+;
corolla tubes 2.5–3.5 mm, limbs 2–3 mm.
(8–)13, green (tips red), 3–6 mm, densely tomentose proximally, glabrate distally.
13 or 21, green, 5–7+ mm, glabrous.
inconspicuous (bractlets red-tipped).
0 or inconspicuous.
10–30+ in open or congested, cymiform arrays.
6–15+ in corymbiform arrays.
1–1.5 mm, glabrous;
pappi 5–6 mm.
1.5–2 mm, glabrous;
pappi 4–5 mm.
= 46.
= 46, 92.
Packera cynthioides
Packera macounii
Packera cynthioides blooms later than other Packera species at the same latitudes. It is noted by collectors as usually growing on north- or west-facing slopes in limestone-derived soils. Its cauline leaves are well developed and held at a shallow angle to the stem, giving the plant a more “leafy” aspect than other members of the genus.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera macounii is similar in overall morphology to P. cana. Leaves of P. macounii are narrower and frequently revolute. It is often cited as being collected on serpentine soils; it is not restricted to them. Senecio fastigiatus Nuttall (1840) is a later homonym of S. fastigiatus Schweinitz ex Elliott (1823), a name of uncertain application.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria, Turner Photog. 
WildflowerSearch
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USDA Plants Database- LBJ Wildflower Center
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