Packera schweinitziana |
Packera greenei |
|
---|---|---|
New England groundsel, Schweinitz's groundsel, Schweinitz's ragwort |
flame ragwort |
|
Habit | Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). | Perennials, 20–30+ cm; rhizomatous (rhizomes horizontal to erect, not branched), sometimes stoloniferous. |
Stems | 1, glabrous or leaf axils sparsely tomentose. |
1, irregularly lanate or tomentose. |
Basal leaves | (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). |
(and proximal cauline) petiolate; blades orbiculate, ovate, oblanceolate, or rhombic, 20–50+ × 20–40+ mm, bases tapering, sometimes obtuse, margins coarsely dentate to crenate-dentate. |
Cauline leaves | gradually reduced (± sessile; lacerate to subcrenate). |
gradually to abruptly reduced (petioles broad-winged, clasping, blades obovate, bases tapering, margins irregularly dentate; distal sessile, linear to lanceolate, entire). |
Peduncles | bracteate, glabrous. |
bracteate, lanate or tomentose distally. |
Ray florets | 8–13; corolla laminae 4–7 mm. |
8–10(–13); corolla laminae (red-orange) 8–15+ mm. |
Disc florets | 50–70+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. |
35–65+; corolla tubes 4–5 mm, limbs 5–6 mm. |
Phyllaries | 13 or 21, light green (tips sometimes black), 5–8 mm, glabrous. |
21, green (tips sometimes deep red), 8–10+ mm, densely tomentose proximally, sparsely tomentose distally. |
Calyculi | conspicuous. |
conspicuous. |
Heads | 8–20+ in loose, corymbiform arrays. |
1–3+. |
Cypselae | 1–1.5 mm, glabrous; pappi 5–5.5 mm. |
1.5–2.5 mm, glabrous; pappi 8–11 mm. |
2n | = 44. |
= 40, 46, 92. |
Packera schweinitziana |
Packera greenei |
|
Phenology | Flowering May–Jul. | Flowering mid May–early Jul. |
Habitat | Sunny, wet areas, meadows, swamps, ditches, roadsides | Dry, rocky, usually serpentine soils, open scrub-pine associations |
Elevation | 100–1800 m (300–5900 ft) | 100–1600 m (300–5200 ft) |
Distribution |
ME; NC; NH; NY; TN; VT; NB; NS; PE; QC
|
CA
|
Discussion | 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.) |
Of conservation concern. Packera greenei is known from Coast Ranges of northern California. It has relatively large heads and bright orange-red ray corollas; its leaves are usually cyanic abaxially. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 598. | FNA vol. 20, p. 588. |
Parent taxa | Asteraceae > tribe Senecioneae > Packera | Asteraceae > tribe Senecioneae > Packera |
Sibling taxa | ||
Synonyms | Senecio schweinitzianus, Senecio aureus var. lanceolatus, Senecio robbinsii | Senecio greenei |
Name authority | (Nuttall) W. A. Weber & Á. Löve: Phytologia 49: 48. (1981) | (A. Gray) W. A. Weber & Á. Löve: Phytologia 49: 47. (1981) |
Web links |