Packera streptanthifolia |
Packera bernardina |
|
---|---|---|
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel |
San Bernardino ragwort |
|
Habit | Perennials, 10–50+ cm; fibrous-rooted (caudices weak to stout, horizontal to suberect). | Perennials, 15–30+ cm; fibrous-rooted (caudices branched, erect to suberect). |
Stems | 1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils. |
1 (per rosette, rosettes clustered), lanate-tomentose to 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). |
(and proximal cauline) petiolate; blades obovate to broadly spatulate, 5–20+ × 10–15 mm, bases tapering, margins subentire or dentate apically (faces lanate-tomentose to glabrescent). |
Cauline leaves | gradually to abruptly reduced (± petiolate or sessile; entire or subentire). |
gradually reduced (sessile; spatulate to linear, densely tomentose). |
Peduncles | bracteate, glabrous or sparsely tomentose. |
bracteate, densely lanate-tomentose. |
Ray florets | 8 or 13; corolla laminae 5–10 mm. |
8 or 13; corolla laminae 8–10 mm. |
Disc florets | 35–60+; corolla tubes 2–4 mm, limbs 2.5–4 mm. |
35–50+; corolla tubes 2–2.5 mm, limbs 2–2.5 mm. |
Phyllaries | (8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous. |
13 or 21, green, 6–8 mm, lanate-tomentose, glabrate distally. |
Calyculi | conspicuous. |
0. |
Heads | 2–20+ in loose, corymbiform or subumbelliform arrays. |
2–8+ in compact cymiform arrays. |
Cypselae | 1–2.5 mm, glabrous; pappi 3–6 mm. |
0.75–1 mm, glabrous or hispid on ribs; pappi 3–4 mm. |
2n | = 46, 92. |
= 46. |
Packera streptanthifolia |
Packera bernardina |
|
Phenology | Flowering late May–late Aug. | Flowering late May–late Jul. |
Habitat | Forests, open meadows, valleys, dry to damp and loamy soils | Dry rocky slopes, duff of pine forests |
Elevation | 1000–3400 m (3300–11200 ft) | 1700–2200 m (5600–7200 ft) |
Distribution |
CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; SK; YT
|
CA |
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.) |
Of conservation concern. Packera bernardina is known only from the San Bernardino Mountains and has been collected most frequently from Bear Valley. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 599. | FNA vol. 20, p. 579. |
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 bernardinus, Senecio bernardinus var. sparsilobatus, Senecio ionophyllus var. bernardinus, Senecio ionophyllus var. sparsilobatus, Senecio sparsilobatus |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) |
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