Packera quercetorum
Packera millelobata
Oak Creek ragwort
Uinta ragwort
1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils.
1 or 2–5+, loosely clustered, glabrous or leaf axils sparsely 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.
(and proximal cauline) petiolate;
blades narrowly lanceolate (pinnatifid, lateral lobes 6+ pairs, their bases petioluliform, terminal lobes smaller than laterals), 60–100 × 10–20 mm, bases tapering, ultimate margins dentate.
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).
gradually reduced (sessile).
ebracteate, glabrous.
bracteate or ebracteate, glabrous.
(8–)13;
corolla laminae 6–10+ mm.
(8–)13;
corolla laminae 8–10+ mm.
60–70+;
corolla tubes 2–3 mm, limbs 3.5–4.5 mm.
40–55+;
corolla tubes 2–3 mm, limbs 2–3 mm.
(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy).
(13–)21, green (tips yellow), 4–6+ mm, glabrous.
inconspicuous.
inconspicuous.
15–40+ in open, cymiform arrays.
6–20+ in corymbiform arrays.
1.5–2 mm, glabrous or ± scabrellous;
pappi 5.5–6.5 mm.
1–1.5 mm, hirtellous on ribs;
pappi 3.5–4.5 mm.
= 92.
Packera quercetorum
Packera millelobata
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.)
In the flora area, Packera millelobata occurs only in the trans-Pecos region of western Texas. It has been confused with P. tampicana. Their ranges overlap along the Rio Grande; P. millelobata has leaves with narrow terminal lobes; P. tampicana has terminal lobes as wide as the leaf blade. In addition, P. tampicana is annual with pronounced taproots; P. millelobata is perennial with taprooted caudices.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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