Packera quercetorum
Packera werneriifolia
Oak Creek ragwort
alpine rock butterweed, hoary groundsel
1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils.
1 or 3–5, clustered (often scapiform), usually floccose, lanate-tomentose, or canescent, sometimes glabrate.
(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.
(either of two forms): usually (1) sessile, sometimes petiolate;
blades narrowly lanceolate to elliptic, 15–40+ × 5–25 mm, bases tapering, margins entire or dentate toward apices (often revolute), sometimes (2) petiolate;
blades ovate to orbiculate, 10–20 × 5–15 mm, bases tapering to abruptly contracted, margins entire or wavy, sometimes dentate toward apices.
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).
abruptly reduced (bractlike).
ebracteate, glabrous.
inconspicuously bracteate, glabrous or densely hairy.
(8–)13;
corolla laminae 6–10+ mm.
0, 8, or 13;
corolla laminae 5–10 mm.
60–70+;
corolla tubes 2–3 mm, limbs 3.5–4.5 mm.
30–50+;
corolla tubes 2.5–3.5 mm, limbs 3–4 mm.
(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy).
13 or 21, green (tips sometimes cyanic), 4–10 mm, glabrous or hairy.
inconspicuous.
conspicuous (bractlets often cyanic).
15–40+ in open, cymiform arrays.
1–5(–8) in cymiform to subumbelliform arrays.
1.5–2 mm, glabrous or ± scabrellous;
pappi 5.5–6.5 mm.
1.5–2 mm, glabrous;
pappi 5–6 mm.
= 92.
= 44, 46.
Packera quercetorum
Packera werneriifolia
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 werneriifolia is morphologically variable; it occurs throughout the central Rockies and, sporadically, as far west as the Sierra Nevada. Leaf morphology varies from ovate, elliptic, or narrowly elliptic in the Rockies to narrow with revolute margins in California and Arizona. All specimens are characteristically scapiform.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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