Packera bolanderi
Packera castoreus
Bolander's groundsel, Bolander's ragwort
beaver mountain ragwort
1 or 2–3, loosely clustered, glabrous.
1 or 2–3, (white) woolly-tomentose.
(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.
(and proximal cauline) petiolate;
blades obovate to oblanceolate or spatulate, 10–20+ × 5–18 mm, bases tapering, margins entire or crenate (abaxial faces densely tomentose, adaxial glabrescent).
gradually reduced (petiolate or sessile and clasping; lanceolate, incised).
gradually reduced (becoming sessile and bractlike).
ebracteate or inconspicuously bracteate, glabrous.
ebracteate.
8 or 13;
corolla laminae 10–15+ mm.
0.
30–45+;
corolla tubes 3–4 mm, limbs 3.5–4.5 mm.
not seen.
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.
purple-tinged, 7–10 mm, tomentose (ciliate distally, apices with dense tufts of hairs).
conspicuous.
inconspicuous.
8–15+ in corymbiform or subumbelliform arrays.
1–4+, in corymbiform arrays.
2.5–3.5 mm, glabrous;
pappi 5–7 mm.
not seen (reported to be glabrous).
= 46.
Packera bolanderi
Packera castoreus
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.)
Of conservation concern.
Packera castoreus is known only from relatively few collections from the Tushar Mountains in Beaver and Piute counties. Welsh speculated that it may have some affinities with P. cana and P. werneriifolia.
(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 |
OR
WA
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
