Packera tampicana
Packera indecora
Great Plains ragwort
elegant groundsel, rayless mountain butterweed, rayless mountain groundsel, rayless mountain ragwort
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1 or 2–3, loosely clustered, glabrous or glabrate.
(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 elliptic-ovate, oblong, or subreniform, 20–50 × 10–40+ mm, bases subcordate, truncate, or cuneate, margins usually crenate-dentate to coarsely dentate-lacerate, seldom subentire.
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
gradually reduced (petiolate, resembling basals, sublyrate or dissected; distal sessile, subentire to pinnatifid).
bracteate, glabrous.
ebracteate (or bractlets inconspicuous), glabrous or glabrate.
8 or 13;
corolla laminae 3–7 mm.
0 or 8–10;
corolla laminae (deep yellow) 3–5 mm.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
60–70+;
corolla tubes 2–3 mm, limbs 2.5–3.5 mm.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
13 or 21, green (tips sometimes reddish), 7–9 mm, glabrous.
inconspicuous or 0.
conspicuous (bractlets green, tips sometimes reddish).
4–25+ in corymbiform arrays.
8–20+ in subumbelliform arrays.
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
1–2 mm, glabrous;
pappi 3–4 mm.
= 46.
= 46, 126, 176, 184.
Packera tampicana
Packera indecora
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 indecora is found at relatively low elevations in eastern Canada and at middle to subalpine elevations in the western cordillera. It closely resembles P. pauciflora and it is often difficult to identify specimens in the herbarium. Biosystematic studies (J. F. Bain and J. Whitton 1994) have indicated that although they are morphologically similar, P. indecora and P. pauciflora have distinctly different physiologies and should be maintained as distinct taxa.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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