Packera streptanthifolia
Packera cymbalaria
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel
dwarf arctic groundsel, dwarf arctic ragwort, northern butterweed
1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils.
usually 1 (sometimes more, clustered), usually glabrous, sometimes bases and leaf axils tomentose.
(and proximal cauline, relatively thick and turgid) petiolate;
blades spatulate to oblanceolate, or ovate to orbiculate, 20–40+ × 10–30+ mm, bases tapering to abruptly contracted or subcordate, margins entire, crenate, dentate, or weakly lobulate (faces usually glabrous, sometimes hairy).
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 to abruptly reduced (± petiolate or sessile; entire or subentire).
abruptly reduced (sessile, not clasping; lanceolate, entire or pinnately lobed to pinnatisect).
bracteate, glabrous or sparsely tomentose.
0 or relatively reduced (then densely tomentose).
8 or 13;
corolla laminae 5–10 mm.
0 or 11–13;
corolla laminae (yellow, purple streaks in veins) 10–14+ mm.
35–60+;
corolla tubes 2–4 mm, limbs 2.5–4 mm.
60–75+;
corolla tubes 2–2.5 mm, limbs 4–5 mm.
(8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous.
21, deep red or green (tips red), 6–8 mm, glabrous.
conspicuous.
conspicuous (bractlets cyanic).
2–20+ in loose, corymbiform or subumbelliform arrays.
1–2.
1–2.5 mm, glabrous;
pappi 3–6 mm.
1.5–2 mm, glabrous;
pappi 5–6 mm.
= 46, 92.
= 46, 92, 138.
Packera streptanthifolia
Packera cymbalaria
Packera streptanthifolia is widespread and variable throughout the Western Cordillera. It includes weakly defined phases that have been treated as distinct species or as varieties. Characteristics used to delimit those taxa often overlap and are difficult to score; some “phases” grade into each other. Northern populations are sometimes segregated as a distinct taxon (e.g., Senecio streptanthifolia var. borealis; J. F. Bain 1988).
(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.)
BC
OR
WA
CalFlora
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
