Packera tampicana
Packera plattensis
Great Plains ragwort
plains butterweed, prairie groundsel
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1 or 2–3, clustered, floccose-tomentose proximally and in leaf axils, otherwise sparsely tomentose or 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.
(and proximal cauline) petiolate;
blades narrowly elliptic to elliptic-ovate or oblanceolate to suborbiculate or sublyrate, 20–70+ × 10–30+ mm, bases tapering to rounded or abruptly contracted, margins subentire to crenate, serrate-dentate, or pinnately lobed (abaxial faces floccose-tomentose, especially along midribs, ± glabrescent).
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
gradually reduced (petiolate, sublyrate or pinnatisect, abaxial faces sparsely hairy; distals sessile, subentire to irregularly dissected).
bracteate, glabrous.
conspicuously bracteate, sparsely to densely tomentose.
8 or 13;
corolla laminae 3–7 mm.
8–10;
corolla laminae 9–10 mm.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
60–70+;
corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
13 or 21, green (tips sometimes cyanic), 5–6+ mm, densely tomentose proximally, glabrescent distally.
inconspicuous or 0.
inconspicuous.
4–25+ in corymbiform arrays.
6–20+ in open or congested, corymbiform arrays.
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
1.5–2.5 mm, usually hirtellous, sometimes glabrous;
pappi 6.5–7.5 mm.
= 46.
= 46, 92.
Packera tampicana
Packera plattensis
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.)
Packera plattensis is abundant, widespread, and almost weedy. Putative hybrids with other species are known. Plants in mesic, remnant prairies in the east are sometimes stoloniferous.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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