Packera breweri |
Packera porteri |
|
---|---|---|
Brewer's ragwort |
Porter's butterweed, Porter's groundsel |
|
Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 3–10+ cm; rhizomatous (rhizomes branched). |
Stems | 1, glabrous or leaf axils tomentose. |
1 (often cyanic), glabrous. |
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). |
(relatively turgid, abaxial faces cyanic) petiolate; blades reniform to subreniform, 5–15+ × 5–25+ mm, bases abruptly contracted to cordate, margins usually crenate, sometimes wavy. |
Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
abruptly reduced (1–4, sessile; bractlike, entire). |
Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
ebracteate, glabrous. |
Ray florets | 8–10+; corolla laminae 10–15+ mm. |
8 or 13; corolla laminae 8–10+ mm. |
Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
40–50+; corolla tubes 2.5–3.5 mm, limbs 2.5–3.5 mm. |
Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
13 or 21, deep red, 8–10+ mm, glabrous. |
Calyculi | inconspicuous. |
conspicuous (bractlets often cyanic). |
Heads | 15–50+ in corymbiform arrays. |
borne singly. |
Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
1.5–2.5 mm, glabrous; pappi 4–5.5 mm. |
2n | = 46. |
|
Packera breweri |
Packera porteri |
|
Phenology | Flowering mid Apr–late May. | Flowering mid Jul–mid Aug. |
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | Steep talus slopes in alpine habitats |
Elevation | 200–1500 m (700–4900 ft) | 2800–3900 m (9200–12800 ft) |
Distribution |
CA
|
CO; OR; WA |
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.) |
Multiple collections of Packera porteri are known from Colorado; single collections are known from Oregon (1899; collector indicated few plants were seen) and Washington (1996). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 580. | FNA vol. 20, p. 596. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio breweri | Senecio porteri, Senecio aureus var. alpinus |
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Greene) C. Jeffrey: Kew Bull. 47: 101. (1992) |
Web links |