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FNA | Family List | FNA Vol. 20 | Asteraceae | Tephroseris

6. Tephroseris tundricola (Tolmatchew) Holub, Folia Geobot. Phytotax. 8: 174. 1973.

Senecio tundricola Tolmatchew, Dokl. Akad. Nauk S.S.S.R. 1928: 266. 1928

Perennials, 5–15 cm (unevenly floccose-tomentose to glabrate, especially distal stems, adaxial leaf faces, and phyllaries; rhizomes weakly spreading or suberect). Stems single or loosely clustered. Leaves basal and cauline; petioles weakly winged (passing into blades); blades ovate to lanceolate, 3–5 × 0.5–1.5 cm, margins subentire to denticulate (cauline narrower, sessile, bractlike). Heads 1(–4). Involucres ± abruptly contracted to peduncles. Phyllaries usually 21, green (tips sometimes purplish), 6–8 mm. Ray florets usually 13; corolla laminae 9–12 mm. Disc florets 30–50+; corollas yellow. Cypselae pubescent; pappi white. 2n = 48.

Flowering Jul–Aug. Protected sites on talus and ridges; 0–300 m; Alaskaw; ne Asia (Russia).

In the flora area, Tephroseris tundricola is known only from the Bering Strait region. It is similar to T. lindstroemii; the two are treated in the same species in contemporary Russian floristic studies. Our plants are separable by the characters given in the key.


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