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alpine groundsel, rayless alpine butterweed, rayless alpine groundsel

woolly butterweed, woolly groundsel

Habit Perennials, 20–40+ cm; fibrous-rooted (caudices weakly spreading, horizontal to erect). Perennials, 10–30+ cm; rhizomatous (rhizomes branched, suberect, stout).
Stems

1 or 2–3, clustered, glabrous or glabrate.

1 (per rosette, rosettes clustered), densely lanate or canescent.

Basal leaves

(relatively thick and turgid) petiolate;

blades elliptic-ovate, ovate, or subreniform, 20–40+ × 10–30+ mm, bases tapering to subcordate, margins dentate to crenate (proximal cauline leaves petiolate; margins dissected to pinnatifid).

(and proximal cauline) petiolate;

blades ovate or elliptic to lanceolate, 25–50+ × 10–30 mm, bases tapering, margins entire or irregularly undulate to weakly dentate (abaxial faces persistently lanate, adaxial lanate to subglabrescent).

Cauline leaves

gradually reduced (sessile, subentire).

gradually reduced (petiolate or sessile, then weakly clasping; elliptic to lanceolate, entire or weakly dentate).

Peduncles

bracteate (bractlets cyanic or reddish), glabrous or sparsely tomentose distally.

bracteate, usually densely lanate to floccose-tomentose (sometimes subglabrescent).

Ray florets

0 or 8–13;

corolla laminae (deep orange-yellow) 5–7 mm.

8–10 (or 13);

corolla laminae 8–10+ mm.

Disc florets

60–80+;

corolla tubes 1.5–2.5 mm, limbs 2.5–3.5 mm.

35–50+;

corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.

Phyllaries

13 or 21, deep red or green (then tips deep red to purple), 7–10 mm, glabrous.

13 or 21, green, 5–8+ mm, densely tomentose.

Calyculi

conspicuous (bractlets deep red or at least apices deep red to purple).

inconspicuous (bractlets tomentose).

Heads

1–6+ in open to compact, subumbelliform arrays.

8–15+ in corymbiform arrays.

Cypselae

1–1.5 mm, glabrous;

pappi 3–4.5 mm.

2.5–3.5+ mm, glabrous;

pappi 4.5–7 mm.

2n

= 46, 130+.

= 46, 92.

Packera pauciflora

Packera cana

Phenology Flowering early Jul–late Aug. Flowering late Jun (south)–mid Aug (north).
Habitat Damp meadows or woods, subalpine to alpine in west, lower in east Open plains and sagebrush associations, dry rocky slopes and crevices in granitic and limestone outcrops
Elevation 0–2700 m (0–8900 ft) 200–3700 m (700–12100 ft)
Distribution
from FNA
AK; CA; WA; WY; AB; BC; NL; NT; ON; QC; YT
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; CO; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
[WildflowerSearch map]
[BONAP county map]
Discussion

Heads of Packera pauciflora are usually discoid. Its range and habitat overlap those of P. indecora; the two can be difficult to distinguish. Disjunction from principal distribution to Sierra Nevada of California is 1200 km.

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

Packera cana is found in a wide variety of habitats and in a wide range of elevations throughout the western Cordillera and into the High Plains. Morphology is relatively uniform throughout its range except that alpine specimens are notably dwarfed and are often mistaken for P. werneriifolia, which differs by its consistently scapiform habit.

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

Source FNA vol. 20, p. 595. FNA vol. 20, p. 580.
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. 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
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, 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. quercetorum, P. sanguisorboides, P. schweinitziana, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio pauciflorus, Senecio aureus var. discoideus, Senecio discoideus, Senecio lembertii Senecio canus, Senecio canus var. eradiatus, Senecio canus var. purshianus, Senecio convallium, Senecio hallii, Senecio hallii var. discoidea, Senecio harbourii, Senecio howellii, Senecio laramiensis, Senecio oreopolus, Senecio purshianus
Name authority (Pursh) Á. Löve & D. Löve: Bot. Not. 128: 520. (1976) (Hooker) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981)
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