Dipsacaceae: Pterocephalus perennis. Mt Athos, southern side, around the chapel of Panagia, 1500 m. Rocky limestone slopes with open woodland of Pinus nigra. 2009-07-11.
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. 337