Packera tampicana
Packera ogotorukensis
Great Plains ragwort
Ogotoruk Creek butterweed, Ogotoruk Creek ragwort
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1 (often branched proximally, sometimes distally), sparsely to densely floccose-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 elliptic to oblanceolate or ovate, 20–80+ × 20–60+ mm, bases tapering, margins entire, crenate-serrate, or irregularly to pinnately lobed (abaxial faces white-tomentose, adaxials patchy tomentose to glabrate).
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
gradually to abruptly reduced (sessile; mids lanceolate to oblanceolate, irregularly serrate to pinnately lobed, distals bractlike).
bracteate, glabrous.
bracteate, ± tomentose.
8 or 13;
corolla laminae 3–7 mm.
10–13+;
corolla laminae 8–12+ mm.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
60–70+;
corolla tubes 1–1.5 mm, limbs 2–2.5 mm.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
13 or 21, green (sometimes with purple streaks, tips usually purple), 4–8 mm, proximally tomentose, rarely glabrous.
inconspicuous or 0.
conspicuous (bractlets purple-tinged).
4–25+ in corymbiform arrays.
1(–3).
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
1–1.5 mm, glabrous;
pappi 2.5–3 mm.
= 46.
= 92.
Packera tampicana
Packera ogotorukensis
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.)
Plants of Packera ogotorukensis have been treated as a disjunct of P. conterminus (as Senecio conterminus). Gross morphology, cytological data, and pollen morphology all provide good evidence for recognition of P. ogotorukensis as a distinct species.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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