Difference between revisions of "Packera anonyma"
Phytologia 49: 45. 1981.
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|tribe=Asteraceae tribe Senecioneae | |tribe=Asteraceae tribe Senecioneae | ||
|genus=Packera | |genus=Packera | ||
Revision as of 20:24, 16 December 2019
Perennials, 30–70+ cm; fibrous-rooted (caudices erect to ascending). Stems 1 or 2–5, loosely clustered, bases densely tomentose, leaf axils usually tomentose. Basal leaves petiolate; blades narrowly elliptic to oblanceolate, 30–90+ × 10–20+ mm, bases tapering, margins serrate to crenate-serrate (apices rounded to acute, faces glabrous). Cauline leaves gradually reduced (petiolate or sessile; elliptic to lanceolate, often pinnatifid). Heads 20–70(–100+) in corymbiform arrays. Peduncles bracteate, distally tomentose. Calyculi inconspicuous. Phyllaries 13 or 21, light green, 3–5 mm, glabrous. Ray florets 8 or 13; corolla laminae 5–7+ mm. Disc florets 45–60+; corolla tubes 1.5–2 mm, limbs 1.5–2 mm. Cypselae 0.75–1 mm, hirsute on ribs; pappi 2.5–3 mm. 2n = 44.
Phenology: Flowering early Jun–mid Jul (north), early Apr–late May (south).
Habitat: Open fields, meadows, roadsides, disturbed sites, in drying or sandy soils
Elevation: 50–1800 m
Distribution
Ala., Ark., D.C., Fla., Ga., Ky., La., Md., Miss., N.Y., N.C., Ohio, Pa., S.C., Tenn., Va., W.Va.
Discussion
Packera anonyma is common, almost weedy throughout most of its range. It grows on serpentine in Maryland, Ohio, and Pennsylvania. In western parts of its range, putative hybrids between P. anonyma and P. plattensis and P. tomentosa have been reported.
Selected References
None.