Packera eurycephala
Packera bolanderi
cut-leaf butterweed, wide-head groundsel
Bolander's groundsel, Bolander's ragwort
1 or, usually, multiple, clustered, densely tomentose to glabrescent.
1 or 2–3, loosely clustered, glabrous.
(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.
(and proximal cauline) petiolate;
blades ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised.
gradually reduced (± petiolate, proximal and mid similar to basal, terminal lobes smaller than laterals; distal sessile, incised).
gradually reduced (petiolate or sessile and clasping; lanceolate, incised).
bracteate, sparsely to densely lanate-tomentose.
ebracteate or inconspicuously bracteate, glabrous.
8 or 13;
corolla laminae 10–15 mm.
8 or 13;
corolla laminae 10–15+ mm.
35–50+;
corolla tubes 3.5–4.5 mm, limbs 2.5–3.5 mm.
30–45+;
corolla tubes 3–4 mm, limbs 3.5–4.5 mm.
13 or 21, green (tips sometimes yellow), 8–10+ mm, densely tomentose proximally, glabrescent distally.
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.
inconspicuous (bractlets tomentose).
conspicuous.
5–20+ in open or compact (rarely), cymiform arrays.
8–15+ in corymbiform or subumbelliform arrays.
1–1.5 mm, glabrous;
pappi 6–7 mm.
2.5–3.5 mm, glabrous;
pappi 5–7 mm.
= 46.
= 46.
Packera eurycephala
Packera bolanderi
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (2 in the flora).
The two varieties of Packera bolanderi have been treated as species. The morphologic characteristics used to distinguish the varieties vary widely within some populations. Presence or absence of multicellular hairs has been used to separate the varieties; that trait is also variable. The morphologic distinction is weak; habitat and elevation records lend support for recognizing two varieties.
(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 |
1. Basal leaves (relatively thick and turgid); phyllaries 13 or 21, 6–8+ mm, hairy proximally (hairs tan or brownish, multicelled) | var. bolanderi |
1. Basal leaves (relatively thin); phyllaries 8, 13, (or 21), 5–6 mm, glabrous | var. harfordii |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
WA
