PHYTOLOGIA BALCANICA 27(1): 127 – 150, Sofia, 2021 Rosaceae 87. Sorbus hybrida agg. [syn. Sorbus borbasii Jáv., Hedlundia borbasii (Jáv.) Sennikov & Kurtto] Gr Nomos & Eparchia Dramas: Falakro, below mountain refuge, opposite the snow hole ‘Chionotripta’, 1865 m, 41°17'N, 24°04'E, 18.08.2020, Kofinas obs. (photos). Reported from Mt Falakro as S. roopiana Bordz., ‘new for Greece’ (Akeroyd & Preston 1981), the latter, however, is a species distributed in the Crimea, Caucasus and Anatolia. Treated as Sorbus ×pinnatifida subsp. borbasii (Jáv.) K.I. Chr. by Christensen, the name is unpublished owing to his untimely death. At high altitude on Mt Falakro as observed by Kofinas, the tree is a small bush. The hybrids between the species of the Sorbus aria agg. (subgen. Aria Pers.) and S. aucuparia L. (subgen. Sorbus (L.) Reichenb.) are best treated as belonging to the Sorbus hybrida agg. group. Sorbus borbasii is one of several dozen similar apomictic “microspecies” of hyb

Article in Botanical Journal of the Linnean Society · June 2015 DOI: 10.1111/boj.12289 S. hybrida, 5%–95% ranges), shape of the lamina apex (acute vs. truncate or rounded to obtuse), fruit shape (globose to longer than wide vs. globose to wider than long) and the point of fusion of styles (divided to the base vs. fused nearly to the top). Sorbus bosniaca and S. borbasii differed in lamina length (7–10 cm in S. bosniaca vs. 6–8 cm in S. borbasii), lamina shape (ovate to elliptic vs. broadly ovate), number of lateral leaf veins (15–18 vs. 15–24) and serration of the leaflets (uniserrate with acuminate teeth pointing towards the apex vs. entire with few teeth at the leaflet apex). Differences with S. × thuringiaca were found in lamina length (7–10 cm in S. bosniaca vs. 7–13 cm in S. × thuringiaca), lamina width (4–6 cm vs. 4–8 cm), lamina shape (ovate to elliptic vs. oblong to oblong- lanceolate), number of lateral leaf veins (15–18 vs. 16–27), fruit length (0.8–1.0 cm vs. 1.0–1.