Packera streptanthifolia
Packera macounii
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel
long-ray groundsel, Macoun's butterweed, Macoun's groundsel, Puget butterweed, Siskiyou Mountain ragwort, Siskiyou Mountains ragwort
1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils.
1, sparsely to densely tomentose or glabrescent.
(and proximal cauline, relatively thick and turgid) petiolate;
blades spatulate to oblanceolate, or ovate to orbiculate, 20–40+ × 10–30+ mm, bases tapering to abruptly contracted or subcordate, margins entire, crenate, dentate, or weakly lobulate (faces usually glabrous, sometimes hairy).
(and proximal) petiolate;
blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute).
gradually to abruptly reduced (± petiolate or sessile; entire or subentire).
gradually reduced (distal sessile, bractlike).
bracteate, glabrous or sparsely tomentose.
inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate.
8 or 13;
corolla laminae 5–10 mm.
8(–13);
corolla laminae 8–10+ mm.
35–60+;
corolla tubes 2–4 mm, limbs 2.5–4 mm.
30–40+;
corolla tubes 2.5–3.5 mm, limbs 2–3 mm.
(8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous.
13 or 21, green, 5–7+ mm, glabrous.
conspicuous.
0 or inconspicuous.
2–20+ in loose, corymbiform or subumbelliform arrays.
6–15+ in corymbiform arrays.
1–2.5 mm, glabrous;
pappi 3–6 mm.
1.5–2 mm, glabrous;
pappi 4–5 mm.
= 46, 92.
= 46, 92.
Packera streptanthifolia
Packera macounii
Packera streptanthifolia is widespread and variable throughout the Western Cordillera. It includes weakly defined phases that have been treated as distinct species or as varieties. Characteristics used to delimit those taxa often overlap and are difficult to score; some “phases” grade into each other. Northern populations are sometimes segregated as a distinct taxon (e.g., Senecio streptanthifolia var. borealis; J. F. Bain 1988).
(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.)
SW CO Wildflowers- 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
