Packera obovata
Packera cana
roundleaf ragwort, running groundsel
woolly butterweed, woolly groundsel
1 or multiple, loosely clustered, usually glabrous, sometimes tomentose proximally and in leaf axils.
1 (per rosette, rosettes clustered), densely lanate or canescent.
(and proximal cauline) petiolate;
blades orbiculate, ovate, or obovate, 40–100+ × 20–80+ mm, bases tapering, rounded, or abruptly contracted, margins crenate, dentate, or serrate.
(and proximal cauline) petiolate;
blades ovate or elliptic to lanceolate, 25–50+ × 10–30 mm, bases tapering, margins entire or irregularly undulate to weakly dentate (abaxial faces persistently lanate, adaxial lanate to subglabrescent).
gradually reduced (sessile, clasping; pinnatisect or sublyrate).
gradually reduced (petiolate or sessile, then weakly clasping; elliptic to lanceolate, entire or weakly dentate).
bracteate, glabrous or proximally tomentose.
bracteate, usually densely lanate to floccose-tomentose (sometimes subglabrescent).
8–13(–21);
corolla laminae 7–10 mm.
8–10 (or 13);
corolla laminae 8–10+ mm.
40–50+;
corolla tubes 2–3 mm, limbs 2–3 mm.
35–50+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
13 or 21, green (tips sometimes reddish), 3–6 mm, glabrous or floccose-tomentose proximally.
13 or 21, green, 5–8+ mm, densely tomentose.
conspicuous.
inconspicuous (bractlets tomentose).
6–15+ in open or congested, corymbiform arrays.
8–15+ in corymbiform arrays.
1–1.5 mm, glabrous or hirsute on ribs;
pappi 3–6 mm.
2.5–3.5+ mm, glabrous;
pappi 4.5–7 mm.
= 44, 88, 90.
= 46, 92.
Packera obovata
Packera cana
Packera obovata forms relatively large, stoloniferous colonies in wet sites.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera cana is found in a wide variety of habitats and in a wide range of elevations throughout the western Cordillera and into the High Plains. Morphology is relatively uniform throughout its range except that alpine specimens are notably dwarfed and are often mistaken for P. werneriifolia, which differs by its consistently scapiform habit.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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