Packera breweri |
Packera macounii |
|
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Brewer's ragwort |
long-ray groundsel, Macoun's butterweed, Macoun's groundsel, Puget butterweed, Siskiyou Mountain ragwort, Siskiyou Mountains ragwort |
|
Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 30–40+ cm; taprooted (caudices ± branched, becoming rhizomiform). |
Stems | 1, glabrous or leaf axils tomentose. |
1, sparsely to densely tomentose or glabrescent. |
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) petiolate; blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute). |
Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually reduced (distal sessile, bractlike). |
Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate. |
Ray florets | 8–10+; corolla laminae 10–15+ mm. |
8(–13); corolla laminae 8–10+ mm. |
Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
30–40+; corolla tubes 2.5–3.5 mm, limbs 2–3 mm. |
Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
13 or 21, green, 5–7+ mm, glabrous. |
Calyculi | inconspicuous. |
0 or inconspicuous. |
Heads | 15–50+ in corymbiform arrays. |
6–15+ in corymbiform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
1.5–2 mm, glabrous; pappi 4–5 mm. |
2n | = 46. |
= 46, 92. |
Packera breweri |
Packera macounii |
|
Phenology | Flowering mid Apr–late May. | Flowering early May–early Jul. |
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | Along streams, roadsides, clearings, disturbed sites, rocky soils, coniferous woodlands |
Elevation | 200–1500 m (700–4900 ft) | 400–1400 m (1300–4600 ft) |
Distribution |
CA
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CA; OR; WA; BC
|
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 macounii is similar in overall morphology to P. cana. Leaves of P. macounii are narrower and frequently revolute. It is often cited as being collected on serpentine soils; it is not restricted to them. Senecio fastigiatus Nuttall (1840) is a later homonym of S. fastigiatus Schweinitz ex Elliott (1823), a name of uncertain application. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 580. | FNA vol. 20, p. 591. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio breweri | Senecio macounii, Senecio fastigiatus, Senecio fastigiatus subsp. macounii, Senecio leucocrinus, Senecio ligulifolius, Senecio spatuliformis |
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
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