Packera tampicana
Packera antennariifolia
Great Plains ragwort
shale barren ragwort
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1 (sometimes from rosettes, rosettes sometimes clustered), tomentose.
(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.
petiolate;
blades broadly lanceolate to elliptic or spatulate, 20–40+ × 10–20+ mm, bases tapering, margins entire or subentire to dentate distally (faces tomentose).
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
abruptly reduced (petiolate or sessile; narrowly lanceolate to sublyrate, sharply toothed to pinnatisect or entire).
bracteate, glabrous.
bracteate, densely lanate to sparsely tomentose.
8 or 13;
corolla laminae 3–7 mm.
8–10(–13);
corolla laminae 5–10 mm.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
25–35+;
corolla tubes 3–4 mm, limbs 1.5–2 mm.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
13 or 21, green, 5–7 mm, densely tomentose (apices scarious).
inconspicuous or 0.
inconspicuous.
4–25+ in corymbiform arrays.
6–12+ in corymbiform arrays (lateral cymiform arrays sometimes originating in leaf axils).
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
1–1.5 mm, hirtellous on ribs;
pappi 4–5 mm.
= 46.
= 46.
Packera tampicana
Packera antennariifolia
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 antennariifolia is known only from shale barrens or shale-derived soils in central Appalachia. Plants growing on steep slopes have stouter, more horizontal caudices and more extensive fibrous roots than specimens from other locations. Specimens from shale-derived soils, not growing directly on shale barrens, have weakly lobulate leaves and noticeably less hairiness.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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