Packera ionophylla |
Packera antennariifolia |
|
---|---|---|
Tehachapi ragwort |
shale barren ragwort |
|
Habit | Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). | Perennials, 20–40+ cm; rhizomatous (rhizomes branched, horizontal to suberect). |
Stems | usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-tomentose or glabrescent. |
1 (sometimes from rosettes, rosettes sometimes clustered), tomentose. |
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). |
petiolate; blades broadly lanceolate to elliptic or spatulate, 20–40+ × 10–20+ mm, bases tapering, margins entire or subentire to dentate distally (faces tomentose). |
Cauline leaves | gradually reduced (sessile; bractlike, entire). |
abruptly reduced (petiolate or sessile; narrowly lanceolate to sublyrate, sharply toothed to pinnatisect or entire). |
Peduncles | bracteate, irregularly tomentose. |
bracteate, densely lanate to sparsely tomentose. |
Ray florets | 8–13; corolla laminae 8–10 mm. |
8–10(–13); corolla laminae 5–10 mm. |
Disc florets | 60–75+; corolla tubes 2.5–4 mm, limbs 3.5–5 mm. |
25–35+; corolla tubes 3–4 mm, limbs 1.5–2 mm. |
Phyllaries | (8–)13 or 21, green, 7–10+ mm, densely tomentose proximally, glabrescent distally (tips hair-tufted). |
13 or 21, green, 5–7 mm, densely tomentose (apices scarious). |
Calyculi | inconspicuous. |
inconspicuous. |
Heads | 3–6 in cymiform arrays. |
6–12+ in corymbiform arrays (lateral cymiform arrays sometimes originating in leaf axils). |
Cypselae | 2–2.5 mm, glabrous; pappi 5–7 mm. |
1–1.5 mm, hirtellous on ribs; pappi 4–5 mm. |
2n | = 46. |
= 46. |
Packera ionophylla |
Packera antennariifolia |
|
Phenology | Flowering early Jun–late Aug. | Flowering late Apr–late May. |
Habitat | Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands | Slopes on shale barrens |
Elevation | 1400–3000 m (4600–9800 ft) | 300–800 m (1000–2600 ft) |
Distribution |
CA
|
MD; PA; VA; WV |
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 antennariifolia is known only from shale barrens or shale-derived soils in central Appalachia. Plants growing on steep slopes have stouter, more horizontal caudices and more extensive fibrous roots than specimens from other locations. Specimens from shale-derived soils, not growing directly on shale barrens, have weakly lobulate leaves and noticeably less hairiness. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 590. | FNA vol. 20, p. 578. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio ionophyllus, Senecio ionophyllus var. intrepidus | Senecio antennariifolius |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (Britton) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) |
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