Packera tampicana
Packera macounii
Great Plains ragwort
long-ray groundsel, Macoun's butterweed, Macoun's groundsel, Puget butterweed, Siskiyou Mountain ragwort, Siskiyou Mountains ragwort
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1, sparsely to densely 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) petiolate;
blades lanceolate to oblanceolate, 30–50+ × 10–20 mm, bases tapering, margins entire or shallowly toothed (slightly revolute).
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
gradually reduced (distal sessile, bractlike).
bracteate, glabrous.
inconspicuously bracteate or ebracteate, sparsely tomentose to glabrate.
8 or 13;
corolla laminae 3–7 mm.
8(–13);
corolla laminae 8–10+ mm.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
30–40+;
corolla tubes 2.5–3.5 mm, limbs 2–3 mm.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
13 or 21, green, 5–7+ mm, glabrous.
inconspicuous or 0.
0 or inconspicuous.
4–25+ in corymbiform arrays.
6–15+ in corymbiform arrays.
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
1.5–2 mm, glabrous;
pappi 4–5 mm.
= 46.
= 46, 92.
Packera tampicana
Packera macounii
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 macounii is similar in overall morphology to P. cana. Leaves of P. macounii are narrower and frequently revolute. It is often cited as being collected on serpentine soils; it is not restricted to them. Senecio fastigiatus Nuttall (1840) is a later homonym of S. fastigiatus Schweinitz ex Elliott (1823), a name of uncertain application.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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