Hieracium triangulare (Almq.) Norrl.

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 triangulare (Almq.) Norrl.

Native status

Native. Forest margins.

Distribution

Finland: Al, Ab, N, Ka, St, Ta, Oa; Norway, Sweden ( Samuelsson 1954, Tyler 2006 e), north-western European Russia ( Schljakov 1989), Estonia ( Sennikov 2003 b).

Notes

This species was placed to the Murorum-group by Tyler (2006 e), although its leaves and indumentum are closer to the Bifida - group. It may deserve a placement into a separate group due to its isolated position (e. g. Schljakov (1989), Tyler (2006 e)).

Diagnosis

Stems 50–60 cm tall. Rosulate leaves triangular-ovate or oblong-ovate, with large coarse teeth, rather thick, dark-green, with sparse simple hairs 0.5–0.8 mm above, on rather long petioles. Cauline leaves similar, often reduced. Phyllaries narrowly triangular, with an acute apex, 8–9 mm long, grey-green, with sparse simple hairs 0.5–0.8 mm long, rather dense glandular hairs 0.2–0.6 (0.8) mm long and sparse stellate hairs, apical part with abundant stellate hairs and long ciliae. Synflorescence branches with solitary simple hairs, dense glandular hairs 0.3–0.4 mm long and stellate hairs. Styles with black papillae. Ligules glabrous.