Packera streptanthifolia |
Packera flettii |
|
---|---|---|
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel |
Flett's groundsel, Flett's ragwort |
|
Habit | Perennials, 10–50+ cm; fibrous-rooted (caudices weak to stout, horizontal to suberect). | Perennials, 10–40+ cm; rhizomatous (rhizomes horizontal to erect). |
Stems | 1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils. |
1 or 2–5 (often scapiform), loosely clustered, glabrous or leaf axils sparsely hairy. |
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 ovate or sublyrate, 30–60+ × 10–40+ mm, bases tapering, margins deeply dissected or pinnatifid, ultimate margins crenate to crenate-dentate. |
Cauline leaves | gradually to abruptly reduced (± petiolate or sessile; entire or subentire). |
abruptly reduced or 0 (sessile; ovate to obovate, dissected or pinnatifid). |
Peduncles | bracteate, glabrous or sparsely tomentose. |
inconspicuously bracteate or ebracteate, glabrous. |
Ray florets | 8 or 13; corolla laminae 5–10 mm. |
5 or 8; corolla laminae 5–10 mm. |
Disc florets | 35–60+; corolla tubes 2–4 mm, limbs 2.5–4 mm. |
20–30+; corolla tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. |
Phyllaries | (8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous. |
(8–)13, light green (tips yellowish), 4–7 mm, glabrous. |
Calyculi | conspicuous. |
0 or inconspicuous. |
Heads | 2–20+ in loose, corymbiform or subumbelliform arrays. |
4–10+ in subumbelliform cymiform arrays. |
Cypselae | 1–2.5 mm, glabrous; pappi 3–6 mm. |
1–1.5 mm, glabrous; pappi 4–4.5 mm. |
2n | = 46, 92. |
= 40. |
Packera streptanthifolia |
Packera flettii |
|
Phenology | Flowering late May–late Aug. | Flowering early Jul–mid Aug. |
Habitat | Forests, open meadows, valleys, dry to damp and loamy soils | Exposed slopes, rocky or gravelly soils |
Elevation | 1000–3400 m (3300–11200 ft) | 700–2000 m (2300–6600 ft) |
Distribution |
CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT; SK; YT
|
OR; WA
|
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 flettii is known from the Olympic Mountains and near Mt. Rainer in Washington and coastal mountains of Clatsop County, Oregon. It has a chromosome number unique in the genus and is not known to hybridize with other species of Packera. (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 flettii |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (Wiegand) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
Web links |