Packera quercetorum
Packera indecora
Oak Creek ragwort
elegant groundsel, rayless mountain butterweed, rayless mountain groundsel, rayless mountain 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, loosely clustered, glabrous or 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 elliptic-ovate, oblong, or subreniform, 20–50 × 10–40+ mm, bases subcordate, truncate, or cuneate, margins usually crenate-dentate to coarsely dentate-lacerate, seldom subentire.
gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).
gradually reduced (petiolate, resembling basals, sublyrate or dissected; distal sessile, subentire to pinnatifid).
ebracteate, glabrous.
ebracteate (or bractlets inconspicuous), glabrous or glabrate.
(8–)13;
corolla laminae 6–10+ mm.
0 or 8–10;
corolla laminae (deep yellow) 3–5 mm.
60–70+;
corolla tubes 2–3 mm, limbs 3.5–4.5 mm.
60–70+;
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, green (tips sometimes reddish), 7–9 mm, glabrous.
inconspicuous.
conspicuous (bractlets green, tips sometimes reddish).
15–40+ in open, cymiform arrays.
8–20+ in subumbelliform arrays.
1.5–2 mm, glabrous or ± scabrellous;
pappi 5.5–6.5 mm.
1–2 mm, glabrous;
pappi 3–4 mm.
= 92.
= 46, 126, 176, 184.
Packera quercetorum
Packera indecora
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 indecora is found at relatively low elevations in eastern Canada and at middle to subalpine elevations in the western cordillera. It closely resembles P. pauciflora and it is often difficult to identify specimens in the herbarium. Biosystematic studies (J. F. Bain and J. Whitton 1994) have indicated that although they are morphologically similar, P. indecora and P. pauciflora have distinctly different physiologies and should be maintained as distinct taxa.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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