Packera schweinitziana
Packera cymbalaria
New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort
dwarf arctic groundsel, dwarf arctic ragwort, northern butterweed
1, glabrous or leaf axils sparsely tomentose.
usually 1 (sometimes more, clustered), usually glabrous, sometimes bases and leaf axils tomentose.
(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 ovate to obovate, lyrate, or reniform, 10–30+ × 10–25+ mm, bases cuneate (sometimes tapering to winged petioles) to subcordate or contracted, margins crenate, dentate, or weakly lobed.
gradually reduced (± sessile; lacerate to subcrenate).
abruptly reduced (sessile, not clasping; lanceolate, entire or pinnately lobed to pinnatisect).
bracteate, glabrous.
0 or relatively reduced (then densely tomentose).
8–13;
corolla laminae 4–7 mm.
0 or 11–13;
corolla laminae (yellow, purple streaks in veins) 10–14+ mm.
50–70+;
corolla tubes 3.5–4 mm, limbs 3–3.5 mm.
60–75+;
corolla tubes 2–2.5 mm, limbs 4–5 mm.
13 or 21, light green (tips sometimes black), 5–8 mm, glabrous.
21, deep red or green (tips red), 6–8 mm, glabrous.
conspicuous.
conspicuous (bractlets cyanic).
8–20+ in loose, corymbiform arrays.
1–2.
1–1.5 mm, glabrous;
pappi 5–5.5 mm.
1.5–2 mm, glabrous;
pappi 5–6 mm.
= 44.
= 46, 92, 138.
Packera schweinitziana
Packera cymbalaria
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 cymbalaria occurs in three, disjunct regions: western Alaska eastward into western N.W.T. and south into northwestern British Columbia; Newfoundland and the Gaspé Peninsula, Quebec; and Siberia. Considerable morphologic overlap exists between western and eastern populations in North America; western populations have slightly different flavonoid chemistries and chromosome numbers. Western populations are either diploid or tetraploid; eastern populations are hexaploid. The correct name for this species may prove to be Packera heterophylla (Fischer) E. Wiebe, based on Cineraria heterophylla Fischer.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Go Botany
WildflowerSearch
iNaturalist
USDA Plants Database
BC
PNW Herbaria
