Packera cynthioides
Packera multilobata
White Mountain ragwort
lobeleaf groundsel
1 or 2–3, clustered, densely lanate-tomentose or canescent, tufts of arachnoid tomentum in leaf axils, or glabrescent.
1 or 2–5, loosely clustered, usually glabrous or glabrescent, sometimes sparsely tomentose throughout, axils (basal leaves) tomentose.
(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 obovate, oblanceolate, spatulate, or lyrate to sublyrate (± pinnately lobed, lateral lobes 3–6 pairs, smaller than terminal lobes), 40–80+ × 10–30+ mm, bases tapering, ultimate margins incised to dentate.
gradually reduced (sessile; lanceolate to oblanceolate, entire or wavy).
gradually reduced (sessile).
0 (or relatively reduced, then densely tomentose).
conspicuously bracteate, glabrous or tomentose.
(5–)8;
corolla laminae 8–10+ mm.
8–13;
corolla laminae 7–10 mm.
35–45+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
40–50+;
corolla tubes 4–5 mm, limbs 3–4 mm.
(8–)13, green (tips red), 3–6 mm, densely tomentose proximally, glabrate distally.
13–21, green (tips often yellow), 4–9+ mm, glabrous or sparsely tomentose (at least proximally).
inconspicuous (bractlets red-tipped).
conspicuous.
10–30+ in open or congested, cymiform arrays.
10–30+ in open, corymbiform or subumbelliform arrays.
1–1.5 mm, glabrous;
pappi 5–6 mm.
2–3 mm, glabrous or hirtellous on ribs;
pappi 5–6 mm.
= 46.
= 46, 92.
Packera cynthioides
Packera multilobata
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.)
Packera multilobata is abundant and widespread west of the Continental Divide. Both morphology and habitat vary. In colder parts of its range, plants are shorter, caudices are better developed with clustered stems, and leaf lobes are larger. In desert-like habitats, basal leaves are narrower and more finely lobed, the tomentum is often persistent, and stems are usually single.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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