Packera tampicana
Packera castoreus
Great Plains ragwort
beaver mountain ragwort
1 or 2–6+, clustered (bases cyanic), glabrous or leaf axils sparsely tomentose.
1 or 2–3, (white) woolly-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.
(and proximal cauline) petiolate;
blades obovate to oblanceolate or spatulate, 10–20+ × 5–18 mm, bases tapering, margins entire or crenate (abaxial faces densely tomentose, adaxial glabrescent).
gradually reduced (± petiolate or sessile, clasping; often auriculate, pinnately dissected to pinnately lobed).
gradually reduced (becoming sessile and bractlike).
bracteate, glabrous.
ebracteate.
8 or 13;
corolla laminae 3–7 mm.
0.
30–45(–100+);
corolla tubes 1.5–2.5 mm, limbs (1.5–)2.5–3.5 mm.
not seen.
13 or 21, green (tips sometimes reddish), 3–7 mm, glabrous.
purple-tinged, 7–10 mm, tomentose (ciliate distally, apices with dense tufts of hairs).
inconspicuous or 0.
inconspicuous.
4–25+ in corymbiform arrays.
1–4+, in corymbiform arrays.
1–1.5 mm, hirtellous on ribs;
pappi 3–5 mm.
not seen (reported to be glabrous).
= 46.
Packera tampicana
Packera castoreus
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.)
Of conservation concern.
Packera castoreus is known only from relatively few collections from the Tushar Mountains in Beaver and Piute counties. Welsh speculated that it may have some affinities with P. cana and P. werneriifolia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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