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Oak Creek ragwort

Habit Perennials, 60–100+ cm; taprooted (caudices subligneous, ascending to erect). Perennials, 5–10 cm; ± rhizomatous (bases loosely branched, elongated, horizontal to ascending).
Stems

1 or 2–4, clustered (proximally deeply purple-tinged, distally lightly tinged), glabrous or tomentose at bases and in leaf axils.

1 (sometimes branched from bases), densely white- or gray-tomentose.

Basal leaves

(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 oblanceolate, 20–30+ × 5–13+ mm, bases tapering, margins pinnatifid to crenate.

Cauline leaves

gradually reduced (petiolate or sessile; shallowly lobed, midribs ± winged, distals bractlike, dentate to incised).

gradually reduced (sessile; proximal and mid nearly equaling basals, distals bractlike).

Peduncles

ebracteate, glabrous.

ebracteate, tomentose.

Ray florets

(8–)13;

corolla laminae 6–10+ mm.

0 or 1;

corolla laminae ca. 6 mm.

Disc florets

60–70+;

corolla tubes 2–3 mm, limbs 3.5–4.5 mm.

not seen.

Phyllaries

(13–)21, green (tips yellow), 5–7 mm, glabrous (tips sometimes hairy).

8–13, yellow-green to purple (or with purplish midstripes), 8–9.5 mm, sparsely tomentose (apices rounded).

Calyculi

inconspicuous.

0 or inconspicuous.

Heads

15–40+ in open, cymiform arrays.

3–15+ in corymbiform arrays.

Cypselae

1.5–2 mm, glabrous or ± scabrellous;

pappi 5.5–6.5 mm.

not seen (reported to be glabrous).

2n

= 92.

= 46.

Packera quercetorum

Packera musiniensis

Phenology Flowering mid Apr–early Jun. Flowering mid Jul–mid Aug.
Habitat Rocky soils, open areas, scrub-oak and pinyon-pine forests, chaparral Subalpine and alpine ridges, talus or scree slopes, barren areas on Flagstaff limestone
Elevation 800–2200 m (2600–7200 ft) 2900–3300 m (9500–10800 ft)
Distribution
from FNA
AZ; NM
[WildflowerSearch map]
[BONAP county map]
from FNA
UT
[BONAP county map]
Discussion

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 musiniensis is a high-elevation dwarf species; its affinities within Packera are still uncertain. Welsh believed it to be allied to P. cana or P. multilobata, or both.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 20, p. 598. FNA vol. 20, p. 592.
Parent taxa Asteraceae > tribe Senecioneae > Packera Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio quercetorum, Senecio macropus Senecio musiniensis
Name authority (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) (S. L. Welsh) Trock: Sida 21: 1643. (2005)
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