Packera quercetorum
Packera franciscana
Oak Creek ragwort
San Francisco Peaks ragwort
1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils.
1 (often purplish), sparsely lanate or arachno-tomentose, glabrescent.
(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 lyrate to sublyrate (midribs winged) or ovate to orbiculate, 10–20+ × 30–50+ mm, bases tapering to contracted, ultimate margins ± dentate (faces glabrate at flowering).
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).
gradually reduced (sessile; usually bractlike and entire, sometimes larger and pinnatifid).
ebracteate, glabrous.
conspicuously bracteate (bractlets red-tipped), densely lanate-tomentose.
(8–)13;
corolla laminae 6–10+ mm.
8 or 13;
corolla laminae 5–10 mm.
60–70+;
corolla tubes 2–3 mm, limbs 3.5–4.5 mm.
30–40+;
corolla tubes 2–3 mm, limbs 2.5–3.5 mm.
(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy).
13 or 21, purplish, 6–9 mm, sparsely tomentose.
inconspicuous.
conspicuous (bractlets reddish or purple).
15–40+ in open, cymiform arrays.
borne singly or 2–6 in compact, cymiform arrays.
1.5–2 mm, glabrous or ± scabrellous;
pappi 5.5–6.5 mm.
1.5–2 mm, glabrous;
pappi 5–6 mm.
= 92.
= 46.
Packera quercetorum
Packera franciscana
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.)
Of conservation concern.
Packera franciscana is known only from above timberline in the San Francisco Peaks and is in the Center for Plant Conservation’s National Collection of Endangered Plants. It spreads by extensive rhizomes and is fairly abundant locally.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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