Packera indecora
Packera layneae
elegant groundsel, rayless mountain butterweed, rayless mountain groundsel, rayless mountain ragwort
Layne's ragwort
1 or 2–3, loosely clustered, glabrous or glabrate.
1 or 3–4+, clustered, sparsely tomentose to glabrescent.
petiolate;
blades elliptic-ovate, oblong, or subreniform, 20–50 × 10–40+ mm, bases subcordate, truncate, or cuneate, margins usually crenate-dentate to coarsely dentate-lacerate, seldom subentire.
(and proximal cauline, relatively thick and turgid) petiolate;
blades narrowly elliptic or lanceolate to oblanceolate, 40–70+ × 5–20+ mm, bases tapering, margins entire or subentire to weakly and irregularly dentate (especially at apices).
gradually reduced (petiolate, resembling basals, sublyrate or dissected; distal sessile, subentire to pinnatifid).
gradually reduced (distal sessile, bractlike).
ebracteate (or bractlets inconspicuous), glabrous or glabrate.
bracteate (bractlets usually red-tipped), sparsely tomentose to glabrate.
0 or 8–10;
corolla laminae (deep yellow) 3–5 mm.
5 or 8;
corolla laminae 12–16 mm.
60–70+;
corolla tubes 2–3 mm, limbs 2.5–3.5 mm.
50–60+;
corolla tubes 3.5–4.5 mm, limbs 4.5–5.5 mm.
13 or 21, green (tips sometimes reddish), 7–9 mm, glabrous.
13 or 21, dark green proximally, becoming light green distally (tips red), 7–11+ mm, floccose-tomentose proximally.
conspicuous (bractlets green, tips sometimes reddish).
conspicuous (bractlets red-tipped).
8–20+ in subumbelliform arrays.
5–12+ in open, cymiform arrays.
1–2 mm, glabrous;
pappi 3–4 mm.
2.5–3.5 mm, glabrous;
pappi 7–8 mm.
= 46, 126, 176, 184.
= 92.
Packera indecora
Packera layneae
Packera indecora is found at relatively low elevations in eastern Canada and at middle to subalpine elevations in the western cordillera. It closely resembles P. pauciflora and it is often difficult to identify specimens in the herbarium. Biosystematic studies (J. F. Bain and J. Whitton 1994) have indicated that although they are morphologically similar, P. indecora and P. pauciflora have distinctly different physiologies and should be maintained as distinct taxa.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Packera layneae is known only from the foothills of the western slope of the Sierra Nevada.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
CA
WA
Flora NW
MI Flora
MN Wildflowers
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
