Hieracium pellucidum Laest.

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 pellucidum Laest.

Native status

Native. Sparse pine and spruce forests.

Distribution

Al, Ab, N, St, Ta, Sa, Oa, Tb, Sb, Kb, Om, Ok, Obu, Ks, Lks, Le; British Isles ( Sell and Murrell 2006, Tyler 2014), Germany (Rügen Island) ( Gottschlich et al. 1998, Gottschlich 2024), Denmark ( Schou 2001), Norway, Sweden ( Samuelsson 1954), Baltic countries ( Sennikov 2003 b), Belarus ( Sennikov 1999 b), northern and central European Russia ( Schljakov 1989, Sennikov 2000, Sennikov 2008 b) reaching close to the foothills of the Urals ( Sennikov and Golubeva 2014). Reported from Ukraine ( POWO 2025).

Diagnosis

Stems 40–50 cm tall. Rosulate leaves oblong-ovate or ovate, base rotund to cordate, apex broadly triangular to subrotund, with small teeth mostly at the base, rather thick, pale-green, nearly glabrous above, on long petioles. Cauline leaf single, reduced in size or absent. Phyllaries narrowly triangular, with acute apex, 9–10 mm long, grey-green, with solitary simple hairs up to 1 mm long at the base, abundant glandular hairs 0.7–0.9 (1.2) mm long (with numerous small glandular hairs aggregated at the apex), and sparse stellate hairs along the margins, apex with long ciliae. Synflorescence branches without simple hairs, with rare to rather dense glandular hairs 0.3–0.5 mm long and stellate hairs. Styles with black papillae. Ligules glabrous.