Packera bolanderi
Packera cynthioides
Bolander's groundsel, Bolander's ragwort
White Mountain ragwort
1 or 2–3, loosely clustered, glabrous.
1 or 2–3, clustered, densely lanate-tomentose or canescent, tufts of arachnoid tomentum in leaf axils, or glabrescent.
(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.
(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).
gradually reduced (petiolate or sessile and clasping; lanceolate, incised).
gradually reduced (sessile; lanceolate to oblanceolate, entire or wavy).
ebracteate or inconspicuously bracteate, glabrous.
0 (or relatively reduced, then densely tomentose).
8 or 13;
corolla laminae 10–15+ mm.
(5–)8;
corolla laminae 8–10+ mm.
30–45+;
corolla tubes 3–4 mm, limbs 3.5–4.5 mm.
35–45+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.
(8–)13, green (tips red), 3–6 mm, densely tomentose proximally, glabrate distally.
conspicuous.
inconspicuous (bractlets red-tipped).
8–15+ in corymbiform or subumbelliform arrays.
10–30+ in open or congested, cymiform arrays.
2.5–3.5 mm, glabrous;
pappi 5–7 mm.
1–1.5 mm, glabrous;
pappi 5–6 mm.
= 46.
= 46.
Packera bolanderi
Packera cynthioides
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.)
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.)
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 |
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
