Packera fendleri |
Packera contermina |
|
---|---|---|
Fendler's ragwort, notchleaf groundsel |
dwarf arctic butterweed, high alpine butterweed, northwestern groundsel |
|
Habit | Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to suberect, branched). | Perennials, 4–10+ cm; rhizomatous and/or fibrous-rooted (mat-forming, bases ascending to erect, coarse). |
Stems | 1 or multiple (crowded to subcespitose), floccose-tomentose or glabrescent. |
1 or 2–3, clustered, bases floccose-tomentose, leaf axils tomentose, glabrous elsewhere. |
Basal leaves | petiolate; blades lanceolate to oblanceolate, 30–60+ × 10–30+ mm, bases tapering, margins shallowly, evenly pinnatifid to pinnatisect or wavy (adaxial faces floccose-tomentose or subglabrescent). |
(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; lanceolate to oblanceolate, pinnatisect to wavy). |
(often cyanic) gradually reduced (sessile, not clasping; lanceolate to linear, usually irregularly and shallowly lobed, rarely entire). |
Peduncles | bracteate, densely to irregularly floccose. |
conspicuously bracteate, glabrous. |
Ray florets | 6–8+; corolla laminae 5–7 mm. |
10–12; corolla laminae 8–14+ mm. |
Disc florets | 30–40+; corolla tubes 2.5–3 mm, limbs, 2.5–3.5 mm. |
55–75+; corolla tubes 2.5–3.5 mm, limbs 3–4 mm. |
Phyllaries | 13, green, 5–7 mm, floccose proximally to glabrescent distally. |
21, deep red or green (tips reddish), 8–12+ mm, white-tomentose proximally. |
Calyculi | 0 or inconspicuous (bractlets red-tinged). |
conspicuous (tips of bractlets often purple). |
Heads | 6–25+ in open or compact, corymbiform arrays. |
1–2(–5+). |
Cypselae | 2.5–3 mm, glabrous; pappi 4–5 mm. |
1–1.25 mm, glabrous; pappi 4–7 mm. |
2n | = 46. |
= 160+. |
Packera fendleri |
Packera contermina |
|
Phenology | Flowering late May–early Oct. | Flowering early Jul–late Aug. |
Habitat | Steep slopes, loose, dry rocky or gravelly soils, along streams, open forests, disturbed sites | Subalpine or alpine, open areas, rocky slopes or ravines, moist tundra or snowbeds |
Elevation | 1600–3200 m (5200–10500 ft) | 2100–3000 m (6900–9800 ft) |
Distribution |
CO; NM; WY
|
MT; WA; AB; BC
|
Discussion | Packera fendleri is abundant, almost weedy in the southern Rocky Mountains. It thrives in a wide range of elevations and in a wide variety of habitats; flowering times vary. It frequently grows in close association with other species of Packera and may hybridize with them. (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. 587. | FNA vol. 20, p. 582. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio fendleri, Senecio canovirens, Senecio fendleri var. molestus, Senecio nelsonii, Senecio rosulatus, Senecio salicinus | Senecio conterminus |
Name authority | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Greenman) J. F. Bain: Novon 9: 457. (1999) |
Web links |