Packera schweinitziana |
Packera breweri |
|
---|---|---|
New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort |
Brewer's ragwort |
|
Habit | Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). | Perennials or biennials, 40–100+ cm; fibrous-rooted (caudices erect, stout). |
Stems | 1, glabrous or leaf axils sparsely tomentose. |
1, glabrous or leaf axils tomentose. |
Basal leaves | (and proximal cauline) petiolate; blades narrowly ovate to oblong-lanceolate, 30–70+ × 10–20+ mm, bases abruptly contracted to subcordate, margins usually serrate-dentate, sometimes subcrenate (apices acute). |
(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). |
Cauline leaves | gradually reduced (± sessile; lacerate to subcrenate). |
gradually reduced (petiolate or sessile; obovate, irregularly incised to subpinnate, terminal lobes narrow). |
Peduncles | bracteate, glabrous. |
usually ebracteate (rarely with 1–2 bractlets), glabrous. |
Ray florets | 8–13; corolla laminae 4–7 mm. |
8–10+; corolla laminae 10–15+ mm. |
Disc florets | 50–70+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
45–60+; corolla tubes 3–3.5 mm, limbs 4–4.5 mm. |
Phyllaries | 13 or 21, light green (tips sometimes black), 5–8 mm, glabrous. |
13 or 21, green, 7–9+ mm, glabrous. |
Calyculi | conspicuous. |
inconspicuous. |
Heads | 8–20+ in loose, corymbiform arrays. |
15–50+ in corymbiform arrays. |
Cypselae | 1–1.5 mm, glabrous; pappi 5–5.5 mm. |
2–2.5 mm, glabrous; pappi 6–7 mm. |
2n | = 44. |
= 46. |
Packera schweinitziana |
Packera breweri |
|
Phenology | Flowering May–Jul. | Flowering mid Apr–late May. |
Habitat | Sunny, wet areas, meadows, swamps, ditches, roadsides | Dry, rocky soils, partially shaded or protected areas, grasslands, oak savannas, roadsides, disturbed areas |
Elevation | 100–1800 m (300–5900 ft) | 200–1500 m (700–4900 ft) |
Distribution |
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
|
CA
|
Discussion | Packera schweinitziana is rarely mistaken for any other taxon. It grows on slightly acidic soils and may reproduce vegetatively by branched rhizomes. The group of populations on Roan Mountain on the Tennessee-North Carolina border is disjunct from the main distribution. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 20, p. 598. | FNA vol. 20, p. 580. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio schweinitzianus, Senecio aureus var. lanceolatus, Senecio robbinsii | Senecio breweri |
Name authority | (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (Burtt Davy) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
Web links |