Hieracium constringens 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 constringens Norrl.

Native status

Native. Forest margins, shrubs.

Distribution

Finland: Al; Norway, Sweden ( Samuelsson 1954, Tyler 2017).

Notes

This species is included in Hieracium gulldalense Norrl. in POWO (2025). However, the latter species clearly differs in a much greater number of prominently black-based (vs. nearly white in H. constringens ) simple hairs on its synflorescence branches.

Diagnosis

Stems 30–50 cm tall. Basal leaves always present at anthesis, broadly lanceolate, with small acute teeth, thin, greyish-green, sparsely hairy above (simple hairs 0.7–1 mm long), but glabrous in the centre, on long petioles. Cauline leaves similar, 1–2. Phyllaries triangular, with an acute apex, 9–10 mm long, grey-green, with very dense pale simple hairs 1–1.5 mm long, rare glandular hairs 0.1–0.3 mm long and sparse stellate hairs throughout, apex with numerous short ciliae. Synflorescence branches often strongly abbreviated under the central head, with dense simple hairs, scattered glandular hairs 01– 0.2 mm long and stellate hairs; acladium short. Styles with black papillae. Ligules glabrous.