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New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort

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.

Heads

8–20+ in loose, corymbiform arrays.

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.

Cypselae

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

2n

= 44.

Packera schweinitziana

Phenology Flowering May–Jul.
Habitat Sunny, wet areas, meadows, swamps, ditches, roadsides
Elevation 100–1800 m [300–5900 ft]
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.)

Distribution
from FNA
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
[WildflowerSearch map]
[BONAP county map]
Parent taxa Asteraceae > tribe Senecioneae > Packera
Sibling taxa
P. anonyma, P. antennariifolia, P. aurea, P. bernardina, P. bolanderi, P. breweri, P. cana, P. cardamine, P. castoreus, P. clevelandii, P. contermina, P. crocata, P. cymbalaria, P. cynthioides, P. debilis, P. dimorphophylla, P. eurycephala, P. fendleri, P. flettii, P. franciscana, P. ganderi, P. glabella, P. greenei, P. hartiana, P. hesperia, P. hyperborealis, P. indecora, P. ionophylla, P. layneae, P. macounii, P. malmstenii, P. millefolium, P. millelobata, P. multilobata, P. musiniensis, P. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. spellenbergii, P. streptanthifolia, P. subnuda, P. tampicana, P. texensis, P. tomentosa, P. tridenticulata, P. werneriifolia
Synonyms Senecio schweinitzianus, Senecio aureus var. lanceolatus, Senecio robbinsii
Name authority (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981)
Source Flora of North America vol. 20, p. 598.
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