Packera indecora
Packera hyperborealis
elegant groundsel, rayless mountain butterweed, rayless mountain groundsel, rayless mountain ragwort
northern groundsel
1 or 2–3, loosely clustered, glabrous or glabrate.
usually 1, sometimes multiple, bases and leaf axils tomentose, otherwise glabrous.
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) petiolate;
blades oblanceolate to obovate or lyrate (pinnately lobed to pinnatifid, terminal lobes larger than laterals), 10–30+ × 10–20+ mm, bases tapering, ultimate margins ± crenate to serrate.
gradually reduced (petiolate, resembling basals, sublyrate or dissected; distal sessile, subentire to pinnatifid).
gradually to abruptly reduced (sessile; pinnatisect or entire).
ebracteate (or bractlets inconspicuous), glabrous or glabrate.
bracteate (bractlets purple-tinged), glabrous or glabrate.
0 or 8–10;
corolla laminae (deep yellow) 3–5 mm.
0 (rarely) or 10–12;
corolla laminae 8–10 mm.
60–70+;
corolla tubes 2–3 mm, limbs 2.5–3.5 mm.
45–60+;
corolla tubes 3.5–4 mm, limbs 3–3.5 mm.
13 or 21, green (tips sometimes reddish), 7–9 mm, glabrous.
13, green (sometimes purple-tinged distally), 6–8 mm, glabrous.
conspicuous (bractlets green, tips sometimes reddish).
0 or inconspicuous (bractlets purple-tinged).
8–20+ in subumbelliform arrays.
1–2(–5+) in cymiform arrays.
1–2 mm, glabrous;
pappi 3–4 mm.
1.5–2.5 mm, hirtellous on ribs;
pappi 6–7 mm.
= 46, 126, 176, 184.
= 46.
Packera indecora
Packera hyperborealis
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.)
Packera hyperborealis is known only from lowland tundra from Alaska to the Mackenzie River and as far south as the northern end of the Franklin Mountains. It has also been collected as far north as Banks Island.
(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
