Packera tampicana
Packera eurycephala
Great Plains ragwort
cut-leaf butterweed, wide-head groundsel
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1 or, usually, multiple, clustered, densely tomentose to glabrescent.
(and proximal cauline) petiolate;
blades oblanceolate to spatulate (usually pinnately lobed, lateral lobes 1–6+ pairs, their bases petioluliform, terminal lobes usually larger than laterals, often reniform to ± orbiculate, midribs sometimes ± winged and/or toothed between the primary lobes), 40–120+ × 10–30+ mm, bases ± cuneate, ultimate margins subentire or irregularly crenate, dentate, or lobed.
(soon withering), petiolate;
blades lyrate (lateral lobes 2–6+ pairs), ovate, obovate, or spatulate, 70–100+ × 20–30+ mm, bases tapering, ultimate margins irregularly and coarsely serrate-dentate.
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
gradually reduced (± petiolate, proximal and mid similar to basal, terminal lobes smaller than laterals; distal sessile, incised).
bracteate, glabrous.
bracteate, sparsely to densely lanate-tomentose.
8 or 13;
corolla laminae 3–7 mm.
8 or 13;
corolla laminae 10–15 mm.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
35–50+;
corolla tubes 3.5–4.5 mm, limbs 2.5–3.5 mm.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
13 or 21, green (tips sometimes yellow), 8–10+ mm, densely tomentose proximally, glabrescent distally.
inconspicuous or 0.
inconspicuous (bractlets tomentose).
4–25+ in corymbiform arrays.
5–20+ in open or compact (rarely), cymiform arrays.
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
1–1.5 mm, glabrous;
pappi 6–7 mm.
= 46.
= 46.
Packera tampicana
Packera eurycephala
Packera tampicana is fairly widespread along the Gulf Coastal Plain and north and in Mexico. Morphologically, P. tampicana most closely resembles P. glabella; the former grows in very wet, sandy or clay soils and open sunlight, the latter grows in drier habitats, usually in partial shade.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Varieties 2 (2 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Stems (1–)2–6; leaf blades: margins usually serrate-dentate, sometimes deeply dissected, midribs winged | var. eurycephala |
1. Stems 1; leaf blades finely dissected, lateral lobes also dissected, midribs not or weakly winged | var. lewisrosei |
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