Vincetoxicum speciosum Boiss. & Spruner

Taxon info
Vincetoxicum speciosum was described from Mt Timfristos and is almost endemic to the Balkan Peninsula, just extending into NW Anatolia. It is the largest of the Greek species, growing in montane meadows and open woodland, mainly in the NE & C mainland, and recognized by the blackish purple flowers.A
A. Dimopoulos, P., Raus, Th., Bergmeier, E., Constantinidis, Th., Iatrou, G., Kokkini, S., Strid, A. & Tzanoudakis, D. 2013: Vascular plants of Greece: An annotated checklist. 31: p. 322 [Plate 3.2]