Packera breweri |
Packera neomexicana |
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Brewer's ragwort |
New Mexico groundsel |
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Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, biennials, or annuals, 20–50+ cm; fibrous-rooted, taprooted, or ± rhizomatous (bases branched, horizontal or ascending to erect). | ||||||||
Stems | 1, glabrous or leaf axils tomentose. |
1 or 2–5+, clustered, lanate- or arachno-tomentose or glabrescent. |
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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). |
(often abaxially cyanic) petiolate (petioles hairy to glabrate); blades ovate to lanceolate or narrowly lanceolate, 20–60+ × 10–30+ mm, bases abruptly contracted to tapering, margins subentire or denticulate to subserrate (abaxial faces usually tomentose, adaxials frequently glabrate). |
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Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually or abruptly reduced (proximal petiolate, similar to basals; mids and distals sessile, lanceolate, entire). |
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Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
conspicuously bracteate, usually hairy. |
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Ray florets | 8–10+; corolla laminae 10–15+ mm. |
(5–)8 or 13; corolla laminae 4–10 mm. |
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Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
40–60+; corolla tubes 1.5–2.5 mm, limbs 3.5–4.5 mm. |
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Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
13 or 21, green or yellowish, 4–7+ mm, tomentose to glabrescent. |
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Calyculi | inconspicuous. |
conspicuous. |
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Heads | 15–50+ in corymbiform arrays. |
3–20+ in open or compact, corymbiform to subumbelliform arrays (subtended by smaller arrays arising from leaf axils). |
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Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
1.5–2.5 mm, usually hirtellous on ribs, sometimes glabrous; pappi 5–6+ mm. |
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2n | = 46. |
= 44, 46, 92. |
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Packera breweri |
Packera neomexicana |
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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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AZ; CO; NM; UT; w Mexico
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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 3 (3 in the flora). (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. 593. | ||||||||
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Senecio breweri | Senecio neomexicanus | ||||||||
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | ||||||||
Web links |