Packera schweinitziana |
Packera sanguisorboides |
|
---|---|---|
New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort |
burnet ragwort |
|
Habit | Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). | Perennials or biennials, 30–50+ cm; ± fibrous-rooted (bases creeping, ascending to erect). |
Stems | 1, glabrous or leaf axils sparsely tomentose. |
1 or 2–3, clustered, 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 broadly oblanceolate (pinnately lobed, lateral lobes 2–3+ pairs, their bases petioluliform, terminal lobes larger than laterals, ovate to reniform, midribs not winged), 60–120+ × 20–60 mm, bases contracted, ultimate margins crenate to crenate-dentate. |
Cauline leaves | gradually reduced (± sessile; lacerate to subcrenate). |
gradually reduced (petiolate or sessile; lyrate to sublyrate, midribs winged, terminal lobes weakly distinct, shallowly dentate). |
Peduncles | bracteate, glabrous. |
inconspicuously bracteate, glabrous or tomentose proximally. |
Ray florets | 8–13; corolla laminae 4–7 mm. |
8; corolla laminae 6–12 mm. |
Disc florets | 50–70+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
35–50+; corolla tubes 2.5–3.5 mm, limbs 2–3 mm. |
Phyllaries | 13 or 21, light green (tips sometimes black), 5–8 mm, glabrous. |
13, bright green (tips light green to yellow), 4–7 mm, glabrous. |
Calyculi | conspicuous. |
inconspicuous. |
Heads | 8–20+ in loose, corymbiform arrays. |
3–8+ in subumbelliform or compound, cymiform arrays (of 2–4+ cymiform clusters of 2–5+ heads each). |
Cypselae | 1–1.5 mm, glabrous; pappi 5–5.5 mm. |
1.5–2 mm, glabrous; pappi 4.5–5.5 mm. |
2n | = 44. |
= 46. |
Packera schweinitziana |
Packera sanguisorboides |
|
Phenology | Flowering May–Jul. | Flowering late Jul–mid Sep. |
Habitat | Sunny, wet areas, meadows, swamps, ditches, roadsides | Damp, open meadows, spruce-aspen forests |
Elevation | 100–1800 m (300–5900 ft) | 2700–3700 m (8900–12100 ft) |
Distribution |
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
|
NM
|
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 sanguisorboides is known from the San Juan and Sangre de Cristo mountains of northern New Mexico, the Magdalena Mountains of western New Mexico, and the Sacramento Mountains of southern Lincoln and Otero counties. It may have affinities with P. coahuilensis Greenman. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 598. | FNA vol. 20, p. 598. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio schweinitzianus, Senecio aureus var. lanceolatus, Senecio robbinsii | Senecio sanguisorboides |
Name authority | (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (Rydberg) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) |
Web links |