Hieracium obatrescens (Dahlst.) Dahlst.

Sennikov, Alexander, 2025, The collection-based inventory and spatial analysis of Hieracium s. str. (Asteraceae) in Finland, Biodiversity Data Journal 13, pp. e 154676-e 154676 : e154676-

Hieracium obatrescens (Dahlst.) Dahlst.

Native status

Native. Open forest margins, shrubs.

Distribution

Finland: Al, Ab; Denmark ( Schou 2001), Sweden ( Johansson 1929).

Diagnosis

Stems 60–90 cm tall. Basal leaves reduced in size, withering at anthesis; cauline leaves 10–13, gradually decreasing in size from the stem base, lowermost ones rhombic-lanceolate to ovate-lanceolate, base narrowly cuneate, apex triangular, with sparse small triangular teeth, grass-green, rigid, with sparse simple hairs 0.5–1 mm long and numerous stellate hairs above, on very short petioles, middle ones ovate-lanceolate, base broadly cuneate, apex long triangular. Phyllaries triangular, with acute apex, 9–10 mm long, grey-green, with rather rare half-black simple hairs 1–1.5 mm long, rather dense glandular hairs 0.5–0.8 mm long and some stellate hairs in the basal part only along the margins, apex without ciliae. Synflorescence branches with rare simple hairs, with solitary glandular hairs 0.2–0.3 mm long and stellate hairs. Styles with black papillae. Ligules glabrous.