Packera streptanthifolia
Packera neomexicana
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel
New Mexico groundsel
1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils.
1 or 2–5+, clustered, lanate- or arachno-tomentose or glabrescent.
(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).
(often abaxially cyanic) petiolate (petioles hairy to glabrate);
blades ovate to lanceolate or narrowly lanceolate, 20–60+ × 10–30+ mm, bases abruptly contracted to tapering, margins subentire or denticulate to subserrate (abaxial faces usually tomentose, adaxials frequently glabrate).
gradually to abruptly reduced (± petiolate or sessile; entire or subentire).
gradually or abruptly reduced (proximal petiolate, similar to basals; mids and distals sessile, lanceolate, entire).
bracteate, glabrous or sparsely tomentose.
conspicuously bracteate, usually hairy.
8 or 13;
corolla laminae 5–10 mm.
(5–)8 or 13;
corolla laminae 4–10 mm.
35–60+;
corolla tubes 2–4 mm, limbs 2.5–4 mm.
40–60+;
corolla tubes 1.5–2.5 mm, limbs 3.5–4.5 mm.
(8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous.
13 or 21, green or yellowish, 4–7+ mm, tomentose to glabrescent.
conspicuous.
conspicuous.
2–20+ in loose, corymbiform or subumbelliform arrays.
3–20+ in open or compact, corymbiform to subumbelliform arrays (subtended by smaller arrays arising from leaf axils).
1–2.5 mm, glabrous;
pappi 3–6 mm.
1.5–2.5 mm, usually hirtellous on ribs, sometimes glabrous;
pappi 5–6+ mm.
= 46, 92.
= 44, 46, 92.
Packera streptanthifolia
Packera neomexicana
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.)
Varieties 3 (3 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Plants loosely tomentose or glabrate; basal leaves: blades narrowly lanceolate, margins subentire or irregularly dentate | var. mutabilis |
1. Plants usually densely lanate or woolly tomentose, seldom glabrate; basal leaves: blades ovate or broadly lanceolate, margins dentate to deeply dentate or dissected | → 2 |
2. Plants taprooted; cauline leaves conspicuous | var. neomexicana |
2. Plants rhizomatous or fibrous-rooted; cauline leaves inconspicuous (bractlike) | var. toumeyi |
BC
OR
WA
CalFlora
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
