Packera anonyma |
Packera cana |
|
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Small's ragwort |
woolly butterweed, woolly groundsel |
|
Habit | Perennials, 30–70+ cm; fibrous-rooted (caudices erect to ascending). | Perennials, 10–30+ cm; rhizomatous (rhizomes branched, suberect, stout). |
Stems | 1 or 2–5, loosely clustered, bases densely tomentose, leaf axils usually tomentose. |
1 (per rosette, rosettes clustered), densely lanate or canescent. |
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). |
(and proximal cauline) petiolate; blades ovate or elliptic to lanceolate, 25–50+ × 10–30 mm, bases tapering, margins entire or irregularly undulate to weakly dentate (abaxial faces persistently lanate, adaxial lanate to subglabrescent). |
Cauline leaves | gradually reduced (petiolate or sessile; elliptic to lanceolate, often pinnatifid). |
gradually reduced (petiolate or sessile, then weakly clasping; elliptic to lanceolate, entire or weakly dentate). |
Peduncles | bracteate, distally tomentose. |
bracteate, usually densely lanate to floccose-tomentose (sometimes subglabrescent). |
Ray florets | 8 or 13; corolla laminae 5–7+ mm. |
8–10 (or 13); corolla laminae 8–10+ mm. |
Disc florets | 45–60+; corolla tubes 1.5–2 mm, limbs 1.5–2 mm. |
35–50+; corolla tubes 2.5–3.5 mm, limbs 3.5–4.5 mm. |
Phyllaries | 13 or 21, light green, 3–5 mm, glabrous. |
13 or 21, green, 5–8+ mm, densely tomentose. |
Calyculi | inconspicuous. |
inconspicuous (bractlets tomentose). |
Heads | 20–70(–100+) in corymbiform arrays. |
8–15+ in corymbiform arrays. |
Cypselae | 0.75–1 mm, hirsute on ribs; pappi 2.5–3 mm. |
2.5–3.5+ mm, glabrous; pappi 4.5–7 mm. |
2n | = 44. |
= 46, 92. |
Packera anonyma |
Packera cana |
|
Phenology | Flowering early Jun–mid Jul (north), early Apr–late May (south). | Flowering late Jun (south)–mid Aug (north). |
Habitat | Open fields, meadows, roadsides, disturbed sites, in drying or sandy soils | Open plains and sagebrush associations, dry rocky slopes and crevices in granitic and limestone outcrops |
Elevation | 50–1800 m (200–5900 ft) | 200–3700 m (700–12100 ft) |
Distribution |
AL; AR; DC; FL; GA; KY; LA; MD; MS; NC; NY; OH; PA; SC; TN; VA; WV
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AZ; CA; CO; ID; KS; MN; MT; ND; NE; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; SK
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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. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera cana is found in a wide variety of habitats and in a wide range of elevations throughout the western Cordillera and into the High Plains. Morphology is relatively uniform throughout its range except that alpine specimens are notably dwarfed and are often mistaken for P. werneriifolia, which differs by its consistently scapiform habit. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 578. | FNA vol. 20, p. 580. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio anonymus, Senecio aureus var. angustifolius, Senecio earlei, Senecio smallii | Senecio canus, Senecio canus var. eradiatus, Senecio canus var. purshianus, Senecio convallium, Senecio hallii, Senecio hallii var. discoidea, Senecio harbourii, Senecio howellii, Senecio laramiensis, Senecio oreopolus, Senecio purshianus |
Name authority | (Alph. Wood) W. A. Weber & Á. Löve: Phytologia 49: 45. (1981) | (Hooker) W. A. Weber & Á. Löve: Phytologia 49: 46. (1981) |
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