Packera streptanthifolia
Packera bolanderi
cleft-leaf groundsel, Rocky Mountain butterweed, Rocky Mountain groundsel
Bolander's groundsel, Bolander's ragwort
1 or 2–5, clustered, usually glabrous, sometimes sparsely floccose-tomentose proximally and in leaf axils.
1 or 2–3, loosely clustered, glabrous.
(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).
(and proximal cauline) petiolate;
blades ± orbiculate to oblong, or lyrate (lateral lobes 1–3 pairs, sinuses usually rounded, midribs usually winged), 50–120+ × 30–70+ mm, bases cordate to subcordate, margins shallowly to deeply incised.
gradually to abruptly reduced (± petiolate or sessile; entire or subentire).
gradually reduced (petiolate or sessile and clasping; lanceolate, incised).
bracteate, glabrous or sparsely tomentose.
ebracteate or inconspicuously bracteate, glabrous.
8 or 13;
corolla laminae 5–10 mm.
8 or 13;
corolla laminae 10–15+ mm.
35–60+;
corolla tubes 2–4 mm, limbs 2.5–4 mm.
30–45+;
corolla tubes 3–4 mm, limbs 3.5–4.5 mm.
(8–)13 or 21, green (tips sometimes cyanic), 4–7+ mm, glabrous.
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.
conspicuous.
conspicuous.
2–20+ in loose, corymbiform or subumbelliform arrays.
8–15+ in corymbiform or subumbelliform arrays.
1–2.5 mm, glabrous;
pappi 3–6 mm.
2.5–3.5 mm, glabrous;
pappi 5–7 mm.
= 46, 92.
= 46.
Packera streptanthifolia
Packera bolanderi
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 2 (2 in the flora).
The two varieties of Packera bolanderi have been treated as species. The morphologic characteristics used to distinguish the varieties vary widely within some populations. Presence or absence of multicellular hairs has been used to separate the varieties; that trait is also variable. The morphologic distinction is weak; habitat and elevation records lend support for recognizing two varieties.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Basal leaves (relatively thick and turgid); phyllaries 13 or 21, 6–8+ mm, hairy proximally (hairs tan or brownish, multicelled) | var. bolanderi |
1. Basal leaves (relatively thin); phyllaries 8, 13, (or 21), 5–6 mm, glabrous | var. harfordii |
BC
OR
WA
CalFlora
Flora NW
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
