Tephroseris palustris |
Tephroseris lindstroemii |
|
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marsh fleabane, marsh woolly-groundsel, swamp ragwort |
fuscate groundsel, lindstr�m's woolly-groundsel, northern groundsel, twice-hairy butterweed |
|
Habit | Annuals or biennials (perhaps rarely perennials), 20–100 cm (loosely arachnose or villous, hairs white, light yellowish, or reddish brown, indument fugitive in some populations; caudices fibrous-rooted). | Perennials, 10–25(–50) cm (white or gray, floccose- or lanate-tomentose, hairs somewhat matted, sometimes with closely appressed hairs beneath the matted hairs, unevenly glabrate, especially proximal stems, adaxial faces of leaves, and phyllaries; rhizomes creeping or suberect). |
Stems | single. |
single or loosely clustered. |
Leaves | basal and cauline (basal and proximal sometimes withering before flowering, mid-stem leaves prominent at flowering); petioles weakly defined; blades oblanceolate to linear-oblanceolate or spatulate, 5–15 × 0.5–3(–5) cm, margins subentire to coarsely dentate or subpinnatifid (distal leaves bractlike). |
basal and cauline; petioles winged (passing into blades); blades lanceolate to ovate, 3–6(–10) × 1–2.5 cm, margins wavy or subentire to denticulate (cauline similar, narrower, sessile, weakly-clasping, bractlike). |
Involucres | ± abruptly contracted to peduncles. |
± abruptly contracted to peduncles. |
Ray florets | (13–)21+; corolla laminae 5–9+ mm (sometimes incompletely opened, appearing tubular). |
usually 13 or 21; corolla laminae 10–15(–20) mm. |
Disc florets | 30–50; corollas yellow. |
50–80+; corollas orange or orange-yellow. |
Phyllaries | usually 21, green or yellowish green (tips sometimes pinkish), 4–10 mm. |
usually 21, purplish (most of lengths, glabrate), (5–)7–10 mm. |
Heads | (4–)6–20(–40+), in loose to crowded, corymbiform arrays. |
1–4(–6 +). |
Cypselae | glabrous; pappi white or dirty white. |
pubescent; pappi white. |
2n | = 48. |
= 46, 48. |
Tephroseris palustris |
Tephroseris lindstroemii |
|
Phenology | Flowering May–Sep. | Flowering Jun–Aug. |
Habitat | Wet soils, shorelines, pond margins, brackish habitats | Alpine meadows, open tundra |
Elevation | 0–1000 m (0–3300 ft) | 1000–3200 m (3300–10500 ft) |
Distribution |
AK; IA; MI; MN; ND; SD; WI; AB; BC; LB; MB; NT; NU; ON; QC; SK; YT; Eurasia
|
AK; MT; WY; BC; NT; YT; e Asia (Russian Far East)
|
Discussion | Tephroseris palustris varies greatly in stature and in distribution and persistence of tomentum. The variations have been used to distinguish infraspecific taxa or two species; contemporary thought is that the complex is best treated as a single, polymorphic species. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
For Russia, S. S. Kharkevich (1985+, vol. 6) and I. M. Krasnoborov et al. (1987+, vol. 13) treated this taxon as T. tundricola subsp. lindstroemii. It has been widely known in American literature as Senecio fuscatus, a misapplied name. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 20, p. 616. | FNA vol. 20, p. 618. |
Parent taxa | Asteraceae > tribe Senecioneae > Tephroseris | Asteraceae > tribe Senecioneae > Tephroseris |
Sibling taxa | ||
Synonyms | Othonna palustris, Senecio arcticus, Senecio congestus, Senecio congestus var. laceratus, Senecio congestus var. palustris, Senecio congestus var. tonsus, Senecio tubicaulis, T. palustris subsp. congesta | Senecio integrifolius var. lindstroemii, Senecio bivestitus, Senecio lindstroemii, Senecio tundricola subsp. lindstroemii, T. tundricola subsp. lindstroemii |
Name authority | (Linnaeus) Reichenbach: Fl. Saxon., 146. (1842) | (Ostenfeld) Á Löve & D. Löve: Bot. Not. 128: 520. (1976) |
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