Packera ionophylla |
Packera werneriifolia |
|
---|---|---|
Tehachapi ragwort |
alpine rock butterweed, hoary groundsel |
|
Habit | Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). | Perennials, 7–15+ cm; ± rhizomatous (rhizomes branched, sometimes densely crowded). |
Stems | usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-tomentose or glabrescent. |
1 or 3–5, clustered (often scapiform), usually floccose, lanate-tomentose, or canescent, sometimes glabrate. |
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). |
(either of two forms): usually (1) sessile, sometimes petiolate; blades narrowly lanceolate to elliptic, 15–40+ × 5–25 mm, bases tapering, margins entire or dentate toward apices (often revolute), sometimes (2) petiolate; blades ovate to orbiculate, 10–20 × 5–15 mm, bases tapering to abruptly contracted, margins entire or wavy, sometimes dentate toward apices. |
Cauline leaves | gradually reduced (sessile; bractlike, entire). |
abruptly reduced (bractlike). |
Peduncles | bracteate, irregularly tomentose. |
inconspicuously bracteate, glabrous or densely hairy. |
Ray florets | 8–13; corolla laminae 8–10 mm. |
0, 8, or 13; corolla laminae 5–10 mm. |
Disc florets | 60–75+; corolla tubes 2.5–4 mm, limbs 3.5–5 mm. |
30–50+; 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). |
13 or 21, green (tips sometimes cyanic), 4–10 mm, glabrous or hairy. |
Calyculi | inconspicuous. |
conspicuous (bractlets often cyanic). |
Heads | 3–6 in cymiform arrays. |
1–5(–8) in cymiform to subumbelliform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 5–7 mm. |
1.5–2 mm, glabrous; pappi 5–6 mm. |
2n | = 46. |
= 44, 46. |
Packera ionophylla |
Packera werneriifolia |
|
Phenology | Flowering early Jun–late Aug. | Flowering mid Jun–mid Aug. |
Habitat | Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands | Rocky talus slopes, sandy soils in forest openings near or above timberline |
Elevation | 1400–3000 m (4600–9800 ft) | 2400–3700 m (7900–12100 ft) |
Distribution |
CA
|
AZ; CA; CO; ID; NM; NV; UT; WY
|
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 werneriifolia is morphologically variable; it occurs throughout the central Rockies and, sporadically, as far west as the Sierra Nevada. Leaf morphology varies from ovate, elliptic, or narrowly elliptic in the Rockies to narrow with revolute margins in California and Arizona. All specimens are characteristically scapiform. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 590. | FNA vol. 20, p. 602. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio ionophyllus, Senecio ionophyllus var. intrepidus | Senecio aureus var. werneriifolius, Senecio alpicola, Senecio molinarius, Senecio muirii, Senecio perennans, Senecio petraeus, Senecio petrocallis, Senecio petrophilus, Senecio saxosus, Senecio scaposus, Senecio werneriifolius |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) |
Web links |