Packera sanguisorboides
Packera schweinitziana
burnet ragwort
New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort
1 or 2–3, clustered, glabrous or leaf axils tomentose.
1, glabrous or leaf axils sparsely tomentose.
(and proximal cauline) petiolate;
blades broadly oblanceolate (pinnately lobed, lateral lobes 2–3+ pairs, their bases petioluliform, terminal lobes larger than laterals, ovate to reniform, midribs not winged), 60–120+ × 20–60 mm, bases contracted, ultimate margins crenate to crenate-dentate.
(and proximal cauline) petiolate;
blades narrowly ovate to oblong-lanceolate, 30–70+ × 10–20+ mm, bases abruptly contracted to subcordate, margins usually serrate-dentate, sometimes subcrenate (apices acute).
gradually reduced (petiolate or sessile; lyrate to sublyrate, midribs winged, terminal lobes weakly distinct, shallowly dentate).
gradually reduced (± sessile; lacerate to subcrenate).
inconspicuously bracteate, glabrous or tomentose proximally.
bracteate, glabrous.
8;
corolla laminae 6–12 mm.
8–13;
corolla laminae 4–7 mm.
35–50+;
corolla tubes 2.5–3.5 mm, limbs 2–3 mm.
50–70+;
corolla tubes 3.5–4 mm, limbs 3–3.5 mm.
13, bright green (tips light green to yellow), 4–7 mm, glabrous.
13 or 21, light green (tips sometimes black), 5–8 mm, glabrous.
inconspicuous.
conspicuous.
3–8+ in subumbelliform or compound, cymiform arrays (of 2–4+ cymiform clusters of 2–5+ heads each).
8–20+ in loose, corymbiform arrays.
1.5–2 mm, glabrous;
pappi 4.5–5.5 mm.
1–1.5 mm, glabrous;
pappi 5–5.5 mm.
= 46.
= 44.
Packera sanguisorboides
Packera schweinitziana
Packera sanguisorboides is known from the San Juan and Sangre de Cristo mountains of northern New Mexico, the Magdalena Mountains of western New Mexico, and the Sacramento Mountains of southern Lincoln and Otero counties. It may have affinities with P. coahuilensis Greenman.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Packera schweinitziana is rarely mistaken for any other taxon. It grows on slightly acidic soils and may reproduce vegetatively by branched rhizomes. The group of populations on Roan Mountain on the Tennessee-North Carolina border is disjunct from the main distribution.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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