Packera ionophylla |
Packera contermina |
|
---|---|---|
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 |
CA
|
MT; WA; AB; BC
|
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 | ||
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) |
Web links |