Packera breweri |
Packera millefolium |
|
---|---|---|
Brewer's ragwort |
Piedmont ragwort |
|
Habit | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). | Perennials, 25–60+ cm; fibrous-rooted (caudices branched). |
Stems | 1, glabrous or leaf axils tomentose. |
1 or 2–3, clustered, glabrous or leaf axils sparsely hairy. |
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 narrowly ovate to ovate (2–3 times pinnately dissected, ultimate lobes mostly linear to filiform), 50–80 × 30–50 mm, bases ± truncate or auriculate, ultimate margins entire or remotely dentate. |
Cauline leaves | gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
gradually reduced (petiolate or sessile, similar to basals). |
Peduncles | usually ebracteate (rarely with 1–2 bractlets), glabrous. |
bracteate or ebracteate, glabrous. |
Ray florets | 8–10+; corolla laminae 10–15+ mm. |
8–10(–13); corolla laminae 8–12 mm. |
Disc florets | 45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
35–50+; corolla tubes 2–3 mm, limbs 1.5–2.5 mm. |
Phyllaries | 13 or 21, green, 7–9+ mm, glabrous. |
(13–)21, green, 4–6 mm, glabrous (tips sometimes hair-tufted). |
Calyculi | inconspicuous. |
0. |
Heads | 15–50+ in corymbiform arrays. |
10–30+ in open, corymbiform arrays. |
Cypselae | 2–2.5 mm, glabrous; pappi 6–7 mm. |
0.75–1.5 mm, hairy on ribs; pappi 3–4 mm. |
2n | = 46. |
|
Packera breweri |
Packera millefolium |
|
Phenology | Flowering mid Apr–late May. | Flowering early May–mid Jun. |
Habitat | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas | Open areas along streams, rock outcrops in thin, granitic-derived soils |
Elevation | 200–1500 m (700–4900 ft) | 400–900 m (1300–3000 ft) |
Distribution |
CA
|
GA; NC; SC; VA |
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.) |
Of conservation concern. Packera millefolia is known only from granitic soils in the southern Appalachians. It is similar in overall aspect to the widespread P. anonyma; it differs by its 2–3 times pinnately dissected leaves. (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 millefolium, Senecio memmingeri |
Name authority | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) | (Torrey & A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
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