Packera breweri |
Packera cana |
|
---|---|---|
Brewer's ragwort |
woolly butterweed, woolly groundsel |
|
Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 10–30+ cm; rhizomatous (rhizomes branched, suberect, stout). |
Stems | 1, glabrous or leaf axils tomentose. |
1 (per rosette, rosettes clustered), densely lanate or canescent. |
Basal leaves | (and proximal cauline) petiolate; blades spatulate to obovate (pinnately lobed, terminal lobes ovate to oblong, lateral lobes 2–6+ pairs, smaller, midribs narrowly winged), 100–300+ × 20–50(–80+) mm, bases contracted to tapering, ultimate margins crenate or dentate to lacerate (faces glabrous). |
(and proximal cauline) petiolate; blades ovate or elliptic to lanceolate, 25–50+ × 10–30 mm, bases tapering, margins entire or irregularly undulate to weakly dentate (abaxial faces persistently lanate, adaxial lanate to subglabrescent). |
Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually reduced (petiolate or sessile, then weakly clasping; elliptic to lanceolate, entire or weakly dentate). |
Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
bracteate, usually densely lanate to floccose-tomentose (sometimes subglabrescent). |
Ray florets | 8–10+; corolla laminae 10–15+ mm. |
8–10 (or 13); corolla laminae 8–10+ mm. |
Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
35–50+; corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm. |
Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
13 or 21, green, 5–8+ mm, densely tomentose. |
Calyculi | inconspicuous. |
inconspicuous (bractlets tomentose). |
Heads | 15–50+ in corymbiform arrays. |
8–15+ in corymbiform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
2.5–3.5+ mm, glabrous; pappi 4.5–7 mm. |
2n | = 46. |
= 46, 92. |
Packera breweri |
Packera cana |
|
Phenology | Flowering mid Apr–late May. | Flowering late Jun (south)–mid Aug (north). |
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | Open plains and sagebrush associations, dry rocky slopes and crevices in granitic and limestone outcrops |
Elevation | 200–1500 m (700–4900 ft) | 200–3700 m (700–12100 ft) |
Distribution |
CA
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AZ; CA; CO; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
|
Discussion | Packera breweri is known only from Coast Ranges from San Francisco Bay to Los Angeles County and along the eastern edges of the San Joaquin Valley. Populations are relatively small and sporadic; the plants appear not to hybridize with other species of Packera. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera cana is found in a wide variety of habitats and in a wide range of elevations throughout the western Cordillera and into the High Plains. Morphology is relatively uniform throughout its range except that alpine specimens are notably dwarfed and are often mistaken for P. werneriifolia, which differs by its consistently scapiform habit. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 580. | FNA vol. 20, p. 580. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio breweri | Senecio canus, Senecio canus var. eradiatus, Senecio canus var. purshianus, Senecio convallium, Senecio hallii, Senecio hallii var. discoidea, Senecio harbourii, Senecio howellii, Senecio laramiensis, Senecio oreopolus, Senecio purshianus |
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Hooker) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
Web links |
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