Packera cymbalaria |
Packera tomentosa |
|
---|---|---|
dwarf arctic groundsel, dwarf arctic ragwort, northern butterweed |
woolly ragwort |
|
Habit | Perennials, 6–25+ cm; rhizomatous (mat forming, rhizomes horizontal to suberect, branched). | Perennials, 30–60+ cm; taprooted (caudices relatively thick, weakly ascending or erect), sometimes stoloniferous. |
Stems | usually 1 (sometimes more, clustered), usually glabrous, sometimes bases and leaf axils tomentose. |
1, densely lanate-tomentose proximally, floccose-tomentose to glabrescent distally. |
Basal leaves | petiolate; blades ovate to obovate, lyrate, or reniform, 10–30+ × 10–25+ mm, bases cuneate (sometimes tapering to winged petioles) to subcordate or contracted, margins crenate, dentate, or weakly lobed. |
(and proximal cauline) petiolate; blades lanceolate to narrowly ovate or elliptic, 40–120+ × 20–50+ mm, bases tapering, sometimes oblique, margins subentire, crenate, or serrate-dentate. |
Cauline leaves | abruptly reduced (sessile, not clasping; lanceolate, entire or pinnately lobed to pinnatisect). |
gradually reduced (± petiolate or sessile, weakly clasping; dentate to pinnately lobed). |
Peduncles | 0 or relatively reduced (then densely tomentose). |
bracteate, sparsely to densely tomentose. |
Ray florets | 0 or 11–13; corolla laminae (yellow, purple streaks in veins) 10–14+ mm. |
10 or 13; corolla laminae 6–8+ mm. |
Disc florets | 60–75+; corolla tubes 2–2.5 mm, limbs 4–5 mm. |
50–60+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
Phyllaries | 21, deep red or green (tips red), 6–8 mm, glabrous. |
13 or 21, light green, 5–8 mm, usually glabrous (sometimes hairy proximally). |
Calyculi | conspicuous (bractlets cyanic). |
inconspicuous. |
Heads | 1–2. |
10–30+ in open, corymbiform arrays (more in robust individuals). |
Cypselae | 1.5–2 mm, glabrous; pappi 5–6 mm. |
1–1.5 mm, hispid; pappi 5–7 mm. |
2n | = 46, 92, 138. |
= 46. |
Packera cymbalaria |
Packera tomentosa |
|
Phenology | Flowering mid Jun–early Aug. | Flowering (Mar–)May–early Jun. |
Habitat | Exposed rocky slopes, tundra turf | Open meadows, roadways, sandy or shallow soils overlying granitic outcrops |
Elevation | 0–1900 m (0–6200 ft) | 0–500 m (0–1600 ft) |
Distribution |
AK; AB; BC; NF; NT; QC; YT
|
AL; AR; DE; FL; GA; LA; MD; NC; NJ; OK; SC; TX; VA
|
Discussion | Packera cymbalaria occurs in three, disjunct regions: western Alaska eastward into western N.W.T. and south into northwestern British Columbia; Newfoundland and the Gaspé Peninsula, Quebec; and Siberia. Considerable morphologic overlap exists between western and eastern populations in North America; western populations have slightly different flavonoid chemistries and chromosome numbers. Western populations are either diploid or tetraploid; eastern populations are hexaploid. The correct name for this species may prove to be Packera heterophylla (Fischer) E. Wiebe, based on Cineraria heterophylla Fischer. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Packera tomentosa is common throughout most of its range. The basal and proximal cauline leaves are held at about 45 degrees to the stems. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 583. | FNA vol. 20, p. 601. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio cymbalaria, Cineraria lyrata, P. resedifolia, S. fernaldii, S. resedifolius | Senecio tomentosus, Cineraria integrifolia var. minor, S. alabamensis |
Name authority | (Pursh) W. A. Weber & Á. Löve: Bot. Not. 128: 497. (1976) | (Michaux) C. Jeffrey: Kew Bull. 47: 101. (1992) |
Web links |