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