Flora of North America species comparison

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Packera schweinitziana

Packera musiniensis

New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort
Habit Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). Perennials, 5–10 cm; ± rhizomatous (bases loosely branched, elongated, horizontal to ascending).
Stems

1, glabrous or leaf axils sparsely tomentose.

1 (sometimes branched from bases), densely white- or gray-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).

petiolate;

blades oblanceolate, 20–30+ × 5–13+ mm, bases tapering, margins pinnatifid to crenate.
Cauline leaves

gradually reduced (± sessile; lacerate to subcrenate).

gradually reduced (sessile; proximal and mid nearly equaling basals, distals bractlike).
Peduncles

bracteate, glabrous.

ebracteate, tomentose.
Ray florets

8–13;

corolla laminae 4–7 mm.

0 or 1;

corolla laminae ca. 6 mm.
Disc florets

50–70+;

corolla tubes 3.5–4 mm, limbs 3–3.5 mm.

not seen.
Phyllaries

13 or 21, light green (tips sometimes black), 5–8 mm, glabrous.

8–13, yellow-green to purple (or with purplish midstripes), 8–9.5 mm, sparsely tomentose (apices rounded).
Calyculi

conspicuous.

0 or inconspicuous.
Heads

8–20+ in loose, corymbiform arrays.

3–15+ in corymbiform arrays.
Cypselae

1–1.5 mm, glabrous;

pappi 5–5.5 mm.

not seen (reported to be glabrous).
2n

= 44.

= 46.

Packera schweinitziana

Packera musiniensis
Phenology Flowering May–Jul. Flowering mid Jul–mid Aug.
Habitat Sunny, wet areas, meadows, swamps, ditches, roadsides Subalpine and alpine ridges, talus or scree slopes, barren areas on Flagstaff limestone
Elevation 100–1800 m (300–5900 ft) 2900–3300 m (9500–10800 ft)
Distribution
from FNA
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
[WildflowerSearch map]
[BONAP county map]
from FNA
UT
[BONAP county map]
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.)

Of conservation concern.

Packera musiniensis is a high-elevation dwarf species; its affinities within Packera are still uncertain. Welsh believed it to be allied to P. cana or P. multilobata, or both.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 598. FNA vol. 20, p. 592.
Parent taxa Asteraceae > tribe Senecioneae > Packera 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
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. neomexicana, P. obovata, P. ogotorukensis, P. pauciflora, P. paupercula, P. plattensis, P. porteri, P. pseudaurea, P. quercetorum, P. sanguisorboides, P. schweinitziana, 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 Senecio musiniensis
Name authority (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) (S. L. Welsh) Trock: Sida 21: 1643. (2005)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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