Hieracium improvisum 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 improvisum Norrl.

Native status

Native. Sparse forests.

Distribution

Finland: Ab, N, St, Ta, Oa, Tb, Sb. Endemic to Finland.

Diagnosis

Stems 50–60 cm tall. Rosulate leaves narrowly lanceolate, with small to prominent, narrow teeth, rather thick, pale-green, with rare to sparse simple hairs 0.5–1 mm long above, on short petioles. Cauline leaves similar, 3–5. Phyllaries triangular, with a rather obtuse triangular apex, 8–9 mm long, dark-green, with solitary simple hairs 0.5 mm long at the base only, abundant glandular hairs 0.5–0.8 mm long throughout (including margins) and scattered stellate hairs mostly at the base, apex with very few ciliae. Synflorescence branches without simple hairs, with numerous glandular hairs 0.2–0.4 mm long and stellate hairs. Styles with black papillae. Ligules glabrous.