Packera ionophylla |
Packera hyperborealis |
|
---|---|---|
Tehachapi ragwort |
northern groundsel |
|
Habit | Perennials, 15–30+ cm; taprooted (caudices erect) or rhizomatous (rhizomes branched). | Perennials, 6–20+ cm; fibrous-rooted or rhizomatous (rhizomes horizontal to suberect, stout). |
Stems | usually 1, rarely 2–3, clustered, irregularly arachnoid-tomentose to lanate-tomentose or glabrescent. |
usually 1, sometimes multiple, bases and leaf axils tomentose, otherwise glabrous. |
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). |
(and proximal cauline) petiolate; blades oblanceolate to obovate or lyrate (pinnately lobed to pinnatifid, terminal lobes larger than laterals), 10–30+ × 10–20+ mm, bases tapering, ultimate margins ± crenate to serrate. |
Cauline leaves | gradually reduced (sessile; bractlike, entire). |
gradually to abruptly reduced (sessile; pinnatisect or entire). |
Peduncles | bracteate, irregularly tomentose. |
bracteate (bractlets purple-tinged), glabrous or glabrate. |
Ray florets | 8–13; corolla laminae 8–10 mm. |
0 (rarely) or 10–12; corolla laminae 8–10 mm. |
Disc florets | 60–75+; corolla tubes 2.5–4 mm, limbs 3.5–5 mm. |
45–60+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
Phyllaries | (8–)13 or 21, green, 7–10+ mm, densely tomentose proximally, glabrescent distally (tips hair-tufted). |
13, green (sometimes purple-tinged distally), 6–8 mm, glabrous. |
Calyculi | inconspicuous. |
0 or inconspicuous (bractlets purple-tinged). |
Heads | 3–6 in cymiform arrays. |
1–2(–5+) in cymiform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 5–7 mm. |
1.5–2.5 mm, hirtellous on ribs; pappi 6–7 mm. |
2n | = 46. |
= 46. |
Packera ionophylla |
Packera hyperborealis |
|
Phenology | Flowering early Jun–late Aug. | Flowering mid Jun–early Aug. |
Habitat | Dry, rocky slopes, crevices, granitic outcrops, coniferous woodlands | Open, dry, rocky or sandy areas, sometimes in fertile soils overlaying limestone |
Elevation | 1400–3000 m (4600–9800 ft) | 0–900 m (0–3000 ft) |
Distribution |
CA
|
AK; NT; NU; YT |
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 hyperborealis is known only from lowland tundra from Alaska to the Mackenzie River and as far south as the northern end of the Franklin Mountains. It has also been collected as far north as Banks Island. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 590. | FNA vol. 20, p. 589. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio ionophyllus, Senecio ionophyllus var. intrepidus | Senecio hyperborealis |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (Greenman) Á. Löve & D. Löve: Bot. Not. 128: 520. (1976) |
Web links |