Packera bolanderi
Packera hesperia
Bolander's groundsel, Bolander's ragwort
serpentine groundsel, Siskiyou butterweed, western ragwort
1 or 2–3, loosely clustered, glabrous.
1, glabrous or sparsely 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 ovate, oblanceolate, or spatulate, 10–30 × 5–20 mm, bases tapering, sometimes obtuse, margins entire, subentire, or dentate.
gradually reduced (petiolate or sessile and clasping; lanceolate, incised).
abruptly reduced (sessile, clasping; bractlike, entire).
ebracteate or inconspicuously bracteate, glabrous.
bracteate (bractlets red-tinged), densely lanate-tomentose.
8 or 13;
corolla laminae 10–15+ mm.
(8–)13;
corolla laminae 6–10+ mm.
30–45+;
corolla tubes 3–4 mm, limbs 3.5–4.5 mm.
35–50+;
corolla tubes 2.5–3.5 mm, limbs 3–4 mm.
(8), 13, or 21, dark green, 5–8 mm, glabrous or sparsely tomentose proximally.
(13–)21, green (tips red or dark red), densely tomentose proximally.
conspicuous.
conspicuous (bractlets narrow, red-tinged).
8–15+ in corymbiform or subumbelliform arrays.
1–4+ in corymbiform arrays.
2.5–3.5 mm, glabrous;
pappi 5–7 mm.
1.5–2 mm, glabrous;
pappi 5–6 mm.
= 46.
= 46.
Packera bolanderi
Packera hesperia
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 hesperia is known only from the Siskiyou Mountains.
(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
CA
