Packera quercetorum
Packera hartiana
Oak Creek ragwort
Hart's ragwort
1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils.
1 or 2–3, clustered, bases and leaf axils usually loosely floccose-tomentose, 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.
petiolate;
blades ovate to obovate or suborbiculate, 30–80 × 20–40+ mm, bases tapering, sometimes obtuse or contracted, margins serrate-dentate to weakly crenate (abaxial faces sometimes hairy).
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).
gradually reduced (petiolate, often sublyrate, sometimes weakly pinnatisect; mids and distals sessile, pinnatisect to subentire).
ebracteate, glabrous.
bracteate, loosely tomentose or glabrescent.
(8–)13;
corolla laminae 6–10+ mm.
8 or 13;
corolla laminae 5–8 mm.
60–70+;
corolla tubes 2–3 mm, limbs 3.5–4.5 mm.
50–65+;
corolla tubes 2–4 mm, limbs 2.5–3.5 mm.
(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy).
(13–)21, green, 5–7 mm, glabrous or sparsely tomentose.
inconspicuous.
0.
15–40+ in open, cymiform arrays.
3–9+ in open, corymbiform arrays.
1.5–2 mm, glabrous or ± scabrellous;
pappi 5.5–6.5 mm.
1–2 mm, glabrous;
pappi 3.5–4.5 mm.
= 92.
= 44.
Packera quercetorum
Packera hartiana
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 hartiana resembles both P. paupercula and P. plattensis; it is separated from both on the basis of geography and morphologic characters. New Mexico populations were formerly treated as P. quaerens; the morphologic characters used to separate the two entities vary and overlap.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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