Packera eurycephala
Packera contermina
cut-leaf butterweed, wide-head groundsel
dwarf arctic butterweed, high alpine butterweed, northwestern groundsel
1 or, usually, multiple, clustered, densely tomentose to glabrescent.
1 or 2–3, clustered, bases floccose-tomentose, leaf axils tomentose, glabrous elsewhere.
(soon withering), petiolate;
blades lyrate (lateral lobes 2–6+ pairs), ovate, obovate, or spatulate, 70–100+ × 20–30+ mm, bases tapering, ultimate margins irregularly and coarsely serrate-dentate.
(thick, fleshy) petiolate;
blades usually ovate, oblong, or spatulate, sometimes sublyrate, 20–50+ × 20–40+ mm, bases tapering (to winged petioles) or abruptly contracted to subcordate (petioles narrow), margins crenate, coarsely serrate, or subentire.
gradually reduced (± petiolate, proximal and mid similar to basal, terminal lobes smaller than laterals; distal sessile, incised).
(often cyanic) gradually reduced (sessile, not clasping; lanceolate to linear, usually irregularly and shallowly lobed, rarely entire).
bracteate, sparsely to densely lanate-tomentose.
conspicuously bracteate, glabrous.
8 or 13;
corolla laminae 10–15 mm.
10–12;
corolla laminae 8–14+ mm.
35–50+;
corolla tubes 3.5–4.5 mm, limbs 2.5–3.5 mm.
55–75+;
corolla tubes 2.5–3.5 mm, limbs 3–4 mm.
13 or 21, green (tips sometimes yellow), 8–10+ mm, densely tomentose proximally, glabrescent distally.
21, deep red or green (tips reddish), 8–12+ mm, white-tomentose proximally.
inconspicuous (bractlets tomentose).
conspicuous (tips of bractlets often purple).
5–20+ in open or compact (rarely), cymiform arrays.
1–2(–5+).
1–1.5 mm, glabrous;
pappi 6–7 mm.
1–1.25 mm, glabrous;
pappi 4–7 mm.
= 46.
= 160+.
Packera eurycephala
Packera contermina
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera contermina grows in rocky areas and produces relatively short rhizomes and abundant thin fibrous roots. In mesic sites, the rhizomes are more robust and the fibrous roots are fewer. This taxon has been treated as part of P. cymbalaria or P. subnuda. Morphologic and cytologic data lend support to its recognition at species rank.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Stems (1–)2–6; leaf blades: margins usually serrate-dentate, sometimes deeply dissected, midribs winged | var. eurycephala |
1. Stems 1; leaf blades finely dissected, lateral lobes also dissected, midribs not or weakly winged | var. lewisrosei |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
BC
WA
