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Tehachapi ragwort

dwarf arctic butterweed, high alpine butterweed, northwestern groundsel

Habit Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). Perennials, 4–10+ cm; rhizomatous and/or fibrous-rooted (mat-forming, bases ascending to erect, coarse).
Stems

usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-tomentose or glabrescent.

1 or 2–3, clustered, bases floccose-tomentose, leaf axils tomentose, glabrous elsewhere.

Basal leaves

(and proximal cauline, relatively turgid) petiolate;

blades broadly ovate or lyrate (± pinnately lobed, lateral lobes 1–3 pairs, smaller than terminals), 10–30+ × 10–20+ mm, bases tapering to cuneate, ultimate margins subentire or crenate to coarsely dentate (abaxial faces tomentose).

(thick, fleshy) petiolate;

blades usually ovate, oblong, or spatulate, sometimes sublyrate, 20–50+ × 20–40+ mm, bases tapering (to winged petioles) or abruptly contracted to subcordate (petioles narrow), margins crenate, coarsely serrate, or subentire.

Cauline leaves

gradually reduced (sessile; bractlike, entire).

(often cyanic) gradually reduced (sessile, not clasping; lanceolate to linear, usually irregularly and shallowly lobed, rarely entire).

Peduncles

bracteate, irregularly tomentose.

conspicuously bracteate, glabrous.

Ray florets

8–13;

corolla laminae 8–10 mm.

10–12;

corolla laminae 8–14+ mm.

Disc florets

60–75+;

corolla tubes 2.5–4 mm, limbs 3.5–5 mm.

55–75+;

corolla tubes 2.5–3.5 mm, limbs 3–4 mm.

Phyllaries

(8–)13 or 21, green, 7–10+ mm, densely tomentose proximally, glabrescent distally (tips hair-tufted).

21, deep red or green (tips reddish), 8–12+ mm, white-tomentose proximally.

Calyculi

inconspicuous.

conspicuous (tips of bractlets often purple).

Heads

3–6 in cymiform arrays.

1–2(–5+).

Cypselae

2–2.5 mm, glabrous;

pappi 5–7 mm.

1–1.25 mm, glabrous;

pappi 4–7 mm.

2n

= 46.

= 160+.

Packera ionophylla

Packera contermina

Phenology Flowering early Jun–late Aug. Flowering early Jul–late Aug.
Habitat Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands Subalpine or alpine, open areas, rocky slopes or ravines, moist tundra or snowbeds
Elevation 1400–3000 m (4600–9800 ft) 2100–3000 m (6900–9800 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
MT; WA; AB; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Packera ionophylla is known only from the San Bernardino, San Gabriel, and Tehachapi mountains and a population on Alamo Mountain in eastern Ventura County.

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

Packera contermina grows in rocky areas and produces relatively short rhizomes and abundant thin fibrous roots. In mesic sites, the rhizomes are more robust and the fibrous roots are fewer. This taxon has been treated as part of P. cymbalaria or P. subnuda. Morphologic and cytologic data lend support to its recognition at species rank.

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

Source FNA vol. 20, p. 590. FNA vol. 20, p. 582.
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. 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
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, 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 ionophyllus, Senecio ionophyllus var. intrepidus Senecio conterminus
Name authority (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) (Greenman) J. F. Bain: Novon 9: 457. (1999)
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