Packera hesperia |
Packera tomentosa |
|
---|---|---|
serpentine groundsel, Siskiyou butterweed, western ragwort |
woolly ragwort |
|
Habit | Perennials, 7–15+ cm; fibrous-rooted (caudices relatively slender). | Perennials, 30–60+ cm; taprooted (caudices relatively thick, weakly ascending or erect), sometimes stoloniferous. |
Stems | 1, glabrous or sparsely tomentose. |
1, densely lanate-tomentose proximally, floccose-tomentose to glabrescent distally. |
Basal leaves | (and proximal cauline) petiolate; blades ovate, oblanceolate, or spatulate, 10–30 × 5–20 mm, bases tapering, sometimes obtuse, margins entire, subentire, or dentate. |
(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, clasping; bractlike, entire). |
gradually reduced (± petiolate or sessile, weakly clasping; dentate to pinnately lobed). |
Peduncles | bracteate (bractlets red-tinged), densely lanate-tomentose. |
bracteate, sparsely to densely tomentose. |
Ray florets | (8–)13; corolla laminae 6–10+ mm. |
10 or 13; corolla laminae 6–8+ mm. |
Disc florets | 35–50+; corolla tubes 2.5–3.5 mm, limbs 3–4 mm. |
50–60+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
Phyllaries | (13–)21, green (tips red or dark red), densely tomentose proximally. |
13 or 21, light green, 5–8 mm, usually glabrous (sometimes hairy proximally). |
Calyculi | conspicuous (bractlets narrow, red-tinged). |
inconspicuous. |
Heads | 1–4+ in corymbiform arrays. |
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. |
= 46. |
Packera hesperia |
Packera tomentosa |
|
Phenology | Flowering mid Apr–mid Jun. | Flowering (Mar–)May–early Jun. |
Habitat | Serpentine derived soils, open woodland scrub | Open meadows, roadways, sandy or shallow soils overlying granitic outcrops |
Elevation | 500–2500 m (1600–8200 ft) | 0–500 m (0–1600 ft) |
Distribution |
CA; OR
|
AL; AR; DE; FL; GA; LA; MD; NC; NJ; OK; SC; TX; VA
|
Discussion | Of conservation concern. Packera hesperia is known only from the Siskiyou Mountains. (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. 589. | FNA vol. 20, p. 601. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio hesperius, Senecio auleticus | Senecio tomentosus, Cineraria integrifolia var. minor, S. alabamensis |
Name authority | (Greene) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) | (Michaux) C. Jeffrey: Kew Bull. 47: 101. (1992) |
Web links |