Packera schweinitziana |
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New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort |
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Habit | Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). |
Stems | 1, glabrous or leaf axils sparsely 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). |
Cauline leaves | gradually reduced (± sessile; lacerate to subcrenate). |
Peduncles | bracteate, glabrous. |
Ray florets | 8–13; corolla laminae 4–7 mm. |
Disc florets | 50–70+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
Phyllaries | 13 or 21, light green (tips sometimes black), 5–8 mm, glabrous. |
Calyculi | conspicuous. |
Heads | 8–20+ in loose, corymbiform arrays. |
Cypselae | 1–1.5 mm, glabrous; pappi 5–5.5 mm. |
2n | = 44. |
Packera schweinitziana |
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Phenology | Flowering May–Jul. |
Habitat | Sunny, wet areas, meadows, swamps, ditches, roadsides |
Elevation | 100–1800 m (300–5900 ft) |
Distribution |
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
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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.) |
Source | FNA vol. 20, p. 598. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | |
Synonyms | Senecio schweinitzianus, Senecio aureus var. lanceolatus, Senecio robbinsii |
Name authority | (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) |
Web links |