Packera hesperia
Packera cana
serpentine groundsel, Siskiyou butterweed, western ragwort
woolly butterweed, woolly groundsel
1, glabrous or sparsely tomentose.
1 (per rosette, rosettes clustered), densely lanate or canescent.
(and proximal cauline) petiolate;
blades ovate, oblanceolate, or spatulate, 10–30 × 5–20 mm, bases tapering, sometimes obtuse, margins entire, subentire, or dentate.
(and proximal cauline) petiolate;
blades ovate or elliptic to lanceolate, 25–50+ × 10–30 mm, bases tapering, margins entire or irregularly undulate to weakly dentate (abaxial faces persistently lanate, adaxial lanate to subglabrescent).
abruptly reduced (sessile, clasping; bractlike, entire).
gradually reduced (petiolate or sessile, then weakly clasping; elliptic to lanceolate, entire or weakly dentate).
bracteate (bractlets red-tinged), densely lanate-tomentose.
bracteate, usually densely lanate to floccose-tomentose (sometimes subglabrescent).
(8–)13;
corolla laminae 6–10+ mm.
8–10 (or 13);
corolla laminae 8–10+ mm.
35–50+;
corolla tubes 2.5–3.5 mm, limbs 3–4 mm.
35–50+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
(13–)21, green (tips red or dark red), densely tomentose proximally.
13 or 21, green, 5–8+ mm, densely tomentose.
conspicuous (bractlets narrow, red-tinged).
inconspicuous (bractlets tomentose).
1–4+ in corymbiform arrays.
8–15+ in corymbiform arrays.
1.5–2 mm, glabrous;
pappi 5–6 mm.
2.5–3.5+ mm, glabrous;
pappi 4.5–7 mm.
= 46.
= 46, 92.
Packera hesperia
Packera cana
Of conservation concern.
Packera hesperia is known only from the Siskiyou Mountains.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera cana is found in a wide variety of habitats and in a wide range of elevations throughout the western Cordillera and into the High Plains. Morphology is relatively uniform throughout its range except that alpine specimens are notably dwarfed and are often mistaken for P. werneriifolia, which differs by its consistently scapiform habit.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
KS Wildflowers, 
MN Wildflowers, 
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
