Packera multilobata
Packera tridenticulata
lobeleaf groundsel
threetooth ragwort
1 or 2–5, loosely clustered, usually glabrous or glabrescent, sometimes sparsely tomentose throughout, axils (basal leaves) tomentose.
1 or multiple, clustered, usually glabrous, rarely sparsely floccose-tomentose, leaf axils sometimes tomentose.
(and proximal cauline) petiolate;
blades obovate, oblanceolate, spatulate, or lyrate to sublyrate (± pinnately lobed, lateral lobes 3–6 pairs, smaller than terminal lobes), 40–80+ × 10–30+ mm, bases tapering, ultimate margins incised to dentate.
(and proximal cauline, relatively thick and turgid) petiolate;
blades lanceolate or narrowly oblanceolate, 20–40+ × 5–15 mm, bases tapering, margins usually entire, sometimes sub-pinnatisect (apices subentire or dentate).
gradually reduced (sessile).
gradually reduced (± petiolate or sessile).
conspicuously bracteate, glabrous or tomentose.
bracteate, glabrous or sparsely tomentose.
8–13;
corolla laminae 7–10 mm.
8–10(–13);
corolla laminae 5–8+ mm.
40–50+;
corolla tubes 4–5 mm, limbs 3–4 mm.
45–60+;
corolla tubes 3–3.5 mm, limbs 4–5 mm.
13–21, green (tips often yellow), 4–9+ mm, glabrous or sparsely tomentose (at least proximally).
13 or 21, green, 6–10 mm, sparsely tomentose proximally, glabrous distally.
conspicuous.
inconspicuous.
10–30+ in open, corymbiform or subumbelliform arrays.
4–15+ in corymbiform arrays.
2–3 mm, glabrous or hirtellous on ribs;
pappi 5–6 mm.
1.5–2.5 mm, glabrous or sparsely hirtellous on ribs;
pappi 5–6 mm.
= 46, 92.
= 46.
Packera multilobata
Packera tridenticulata
Packera multilobata is abundant and widespread west of the Continental Divide. Both morphology and habitat vary. In colder parts of its range, plants are shorter, caudices are better developed with clustered stems, and leaf lobes are larger. In desert-like habitats, basal leaves are narrower and more finely lobed, the tomentum is often persistent, and stems are usually single.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera tridenticulata is found throughout the central High Plains, in the foothills of the Rocky Mountains, and in high valleys to the west of the Rocky Mountain front. It tends to grow in clumps; the multiple stems arise from well-developed taproots. It apparently hybridizes with P. neomexicana var. mutabilis where their ranges overlap.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
PNW Herbaria
SW CO Wildflowers
WildflowerSearch
iNaturalist
USDA Plants Database
KS Wildflowers
