Packera breweri |
Packera bolanderi |
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Brewer's ragwort |
Bolander's groundsel, Bolander's ragwort |
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Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 20–50+ cm; fibrous-rooted (caudices creeping). | ||||
Stems | 1, glabrous or leaf axils tomentose. |
1 or 2–3, loosely clustered, glabrous. |
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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 ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised. |
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Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually reduced (petiolate or sessile and clasping; lanceolate, incised). |
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Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
ebracteate or inconspicuously bracteate, glabrous. |
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Ray florets | 8–10+; corolla laminae 10–15+ mm. |
8 or 13; corolla laminae 10–15+ mm. |
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Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
30–45+; corolla tubes 3–4 mm, limbs 3.5–4.5 mm. |
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Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally. |
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Calyculi | inconspicuous. |
conspicuous. |
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Heads | 15–50+ in corymbiform arrays. |
8–15+ in corymbiform or subumbelliform arrays. |
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Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
2.5–3.5 mm, glabrous; pappi 5–7 mm. |
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2n | = 46. |
= 46. |
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Packera breweri |
Packera bolanderi |
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Phenology | Flowering mid Apr–late May. | |||||
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | |||||
Elevation | 200–1500 m (700–4900 ft) | |||||
Distribution |
CA
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CA; OR; WA
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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.) |
Varieties 2 (2 in the flora). The two varieties of Packera bolanderi have been treated as species. The morphologic characteristics used to distinguish the varieties vary widely within some populations. Presence or absence of multicellular hairs has been used to separate the varieties; that trait is also variable. The morphologic distinction is weak; habitat and elevation records lend support for recognizing two varieties. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 20, p. 580. | FNA vol. 20, p. 579. | ||||
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Senecio breweri | Senecio bolanderi | ||||
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) | ||||
Web links |