Packera quercetorum
Packera cymbalaria
Oak Creek ragwort
dwarf arctic groundsel, dwarf arctic ragwort, northern butterweed
1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils.
usually 1 (sometimes more, clustered), usually glabrous, sometimes bases and leaf axils tomentose.
(and proximal cauline) petiolate;
blades obovate or lyrate (pinnately lobed, lateral lobes 2–6+ pairs, their bases petioluliform, terminal lobes larger than laterals, midribs narrowly winged), 60–160+ × 20–40+ mm, bases wide, ultimate margins sharply dentate, crenate-dentate, or irregularly incised.
petiolate;
blades ovate to obovate, lyrate, or reniform, 10–30+ × 10–25+ mm, bases cuneate (sometimes tapering to winged petioles) to subcordate or contracted, margins crenate, dentate, or weakly lobed.
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).
abruptly reduced (sessile, not clasping; lanceolate, entire or pinnately lobed to pinnatisect).
ebracteate, glabrous.
0 or relatively reduced (then densely tomentose).
(8–)13;
corolla laminae 6–10+ mm.
0 or 11–13;
corolla laminae (yellow, purple streaks in veins) 10–14+ mm.
60–70+;
corolla tubes 2–3 mm, limbs 3.5–4.5 mm.
60–75+;
corolla tubes 2–2.5 mm, limbs 4–5 mm.
(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy).
21, deep red or green (tips red), 6–8 mm, glabrous.
inconspicuous.
conspicuous (bractlets cyanic).
15–40+ in open, cymiform arrays.
1–2.
1.5–2 mm, glabrous or ± scabrellous;
pappi 5.5–6.5 mm.
1.5–2 mm, glabrous;
pappi 5–6 mm.
= 92.
= 46, 92, 138.
Packera quercetorum
Packera cymbalaria
Packera quercetorum is found only infrequently and in relatively small populations in central and southern Arizona and west-central New Mexico. The plants are robust and have probable affinities to P. multilobata. The plants have a bluish tinge when freshly collected and are distinctive in the field.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera cymbalaria occurs in three, disjunct regions: western Alaska eastward into western N.W.T. and south into northwestern British Columbia; Newfoundland and the Gaspé Peninsula, Quebec; and Siberia. Considerable morphologic overlap exists between western and eastern populations in North America; western populations have slightly different flavonoid chemistries and chromosome numbers. Western populations are either diploid or tetraploid; eastern populations are hexaploid. The correct name for this species may prove to be Packera heterophylla (Fischer) E. Wiebe, based on Cineraria heterophylla Fischer.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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