Packera plattensis
Packera breweri
plains butterweed, prairie groundsel
Brewer's ragwort
1 or 2–3, clustered, floccose-tomentose proximally and in leaf axils, otherwise sparsely tomentose or glabrescent.
1, glabrous or leaf axils tomentose.
(and proximal cauline) petiolate;
blades narrowly elliptic to elliptic-ovate or oblanceolate to suborbiculate or sublyrate, 20–70+ × 10–30+ mm, bases tapering to rounded or abruptly contracted, margins subentire to crenate, serrate-dentate, or pinnately lobed (abaxial faces floccose-tomentose, especially along midribs, ± glabrescent).
(and proximal cauline) petiolate;
blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous).
gradually reduced (petiolate, sublyrate or pinnatisect, abaxial faces sparsely hairy; distals sessile, subentire to irregularly dissected).
gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow).
conspicuously bracteate, sparsely to densely tomentose.
usually ebracteate (rarely with 1–2 bractlets), glabrous.
8–10;
corolla laminae 9–10 mm.
8–10+;
corolla laminae 10–15+ mm.
60–70+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
45–60+;
corolla tubes 3–3.5 mm, limbs 4–4.5 mm.
13 or 21, green (tips sometimes cyanic), 5–6+ mm, densely tomentose proximally, glabrescent distally.
13 or 21, green, 7–9+ mm, glabrous.
inconspicuous.
inconspicuous.
6–20+ in open or congested, corymbiform arrays.
15–50+ in corymbiform arrays.
1.5–2.5 mm, usually hirtellous, sometimes glabrous;
pappi 6.5–7.5 mm.
2–2.5 mm, glabrous;
pappi 6–7 mm.
= 46, 92.
= 46.
Packera plattensis
Packera breweri
Packera plattensis is abundant, widespread, and almost weedy. Putative hybrids with other species are known. Plants in mesic, remnant prairies in the east are sometimes stoloniferous.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera breweri is known only from Coast Ranges from San Francisco Bay to Los Angeles County and along the eastern edges of the San Joaquin Valley. Populations are relatively small and sporadic; the plants appear not to hybridize with other species of Packera.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
IL Wildflowers
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LA Plants
MI Flora
MN Wildflowers
MO Plants
PNW Herbaria
WildflowerSearch
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