Packera streptanthifolia |
Packera fendleri |
|
---|---|---|
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel |
Fendler's ragwort, notchleaf groundsel |
|
Habit | Perennials, 10–50+ cm; fibrous-rooted (caudices weak to stout, horizontal to suberect). | Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to suberect, branched). |
Stems | 1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils. |
1 or multiple (crowded to subcespitose), floccose-tomentose or glabrescent. |
Basal leaves | (and proximal cauline, relatively thick and turgid) petiolate; blades spatulate to oblanceolate, or ovate to orbiculate, 20–40+ × 10–30+ mm, bases tapering to abruptly contracted or subcordate, margins entire, crenate, dentate, or weakly lobulate (faces usually glabrous, sometimes hairy). |
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). |
Cauline leaves | gradually to abruptly reduced (± petiolate or sessile; entire or subentire). |
gradually reduced (sessile; lanceolate to oblanceolate, pinnatisect to wavy). |
Peduncles | bracteate, glabrous or sparsely tomentose. |
bracteate, densely to irregularly floccose. |
Ray florets | 8 or 13; corolla laminae 5–10 mm. |
6–8+; corolla laminae 5–7 mm. |
Disc florets | 35–60+; corolla tubes 2–4 mm, limbs 2.5–4 mm. |
30–40+; corolla tubes 2.5–3 mm, limbs, 2.5–3.5 mm. |
Phyllaries | (8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous. |
13, green, 5–7 mm, floccose proximally to glabrescent distally. |
Calyculi | conspicuous. |
0 or inconspicuous (bractlets red-tinged). |
Heads | 2–20+ in loose, corymbiform or subumbelliform arrays. |
6–25+ in open or compact, corymbiform arrays. |
Cypselae | 1–2.5 mm, glabrous; pappi 3–6 mm. |
2.5–3 mm, glabrous; pappi 4–5 mm. |
2n | = 46, 92. |
= 46. |
Packera streptanthifolia |
Packera fendleri |
|
Phenology | Flowering late May–late Aug. | Flowering late May–early Oct. |
Habitat | Forests, open meadows, valleys, dry to damp and loamy soils | Steep slopes, loose, dry rocky or gravelly soils, along streams, open forests, disturbed sites |
Elevation | 1000–3400 m (3300–11200 ft) | 1600–3200 m (5200–10500 ft) |
Distribution |
CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; SK; YT
|
CO; NM; WY
|
Discussion | Packera streptanthifolia is widespread and variable throughout the Western Cordillera. It includes weakly defined phases that have been treated as distinct species or as varieties. Characteristics used to delimit those taxa often overlap and are difficult to score; some “phases” grade into each other. Northern populations are sometimes segregated as a distinct taxon (e.g., Senecio streptanthifolia var. borealis; J. F. Bain 1988). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 20, p. 599. | FNA vol. 20, p. 587. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio streptanthifolius, P. streptanthifolia var. borealis, Senecio adamsii, Senecio aureus var. borealis, Senecio cognatus, Senecio cymbalarioides, Senecio cymbalarioides var. borealis, Senecio cymbalarioides var. streptanthifolius, Senecio fulgens, Senecio jonesii, Senecio leonardii, Senecio longipetiolatus, Senecio oödes, Senecio platylobus, Senecio rydbergii, Senecio streptanthifolius var. borealis, Senecio streptanthifolius var. kluanei, Senecio streptanthifolius var. laetiflorus, Senecio streptanthifolius var. oödes, Senecio streptanthifolius var. rubricaulis, Senecio streptanthifolius var. wallowensis, Senecio subcuneatus, Senecio suksdorfii, Senecio wardii | Senecio fendleri, Senecio canovirens, Senecio fendleri var. molestus, Senecio nelsonii, Senecio rosulatus, Senecio salicinus |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
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