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Oak Creek ragwort

Fendler's ragwort, notchleaf groundsel

Habit Perennials, 60–100+ cm; taprooted (caudices subligneous, ascending to erect). Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to suberect, branched).
Stems

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

1 or multiple (crowded to subcespitose), floccose-tomentose or glabrescent.

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 lanceolate to oblanceolate, 30–60+ × 10–30+ mm, bases tapering, margins shallowly, evenly pinnatifid to pinnatisect or wavy (adaxial faces floccose-tomentose or subglabrescent).

Cauline leaves

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

gradually reduced (sessile; lanceolate to oblanceolate, pinnatisect to wavy).

Peduncles

ebracteate, glabrous.

bracteate, densely to irregularly floccose.

Ray florets

(8–)13;

corolla laminae 6–10+ mm.

6–8+;

corolla laminae 5–7 mm.

Disc florets

60–70+;

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

30–40+;

corolla tubes 2.5–3 mm, limbs, 2.5–3.5 mm.

Phyllaries

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

13, green, 5–7 mm, floccose proximally to glabrescent distally.

Calyculi

inconspicuous.

0 or inconspicuous (bractlets red-tinged).

Heads

15–40+ in open, cymiform arrays.

6–25+ in open or compact, corymbiform arrays.

Cypselae

1.5–2 mm, glabrous or ± scabrellous;

pappi 5.5–6.5 mm.

2.5–3 mm, glabrous;

pappi 4–5 mm.

2n

= 92.

= 46.

Packera quercetorum

Packera fendleri

Phenology Flowering mid Apr–early Jun. Flowering late May–early Oct.
Habitat Rocky soils, open areas, scrub-oak and pinyon-pine forests, chaparral Steep slopes, loose, dry rocky or gravelly soils, along streams, open forests, disturbed sites
Elevation 800–2200 m (2600–7200 ft) 1600–3200 m (5200–10500 ft)
Distribution
from FNA
AZ; NM
[WildflowerSearch map]
[BONAP county map]
from FNA
CO; NM; WY
[WildflowerSearch map]
[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.)

Packera fendleri is abundant, almost weedy in the southern Rocky Mountains. It thrives in a wide range of elevations and in a wide variety of habitats; flowering times vary. It frequently grows in close association with other species of Packera and may hybridize with them.

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

Source FNA vol. 20, p. 598. FNA vol. 20, p. 587.
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. 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. 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 fendleri, Senecio canovirens, Senecio fendleri var. molestus, Senecio nelsonii, Senecio rosulatus, Senecio salicinus
Name authority (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981)
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