Table 1 Taxonomic composition of the fossil pollen flora from the Tundzha Basin

Abies sp.

Lycopodium sp.

Acer sp.

Magnolia sp.

Achillea sp.

Mentha/Salvia

Alisma sp.

Myrica sp.

Alnus sp.

Nuphar sp.

Amaranthaceae: Chenopodioideae

Nymphaeaceae

Anacardiaceae

Nyssa sp.

Apiaceae

Oleaceae

Araliaceae

Osmunda sp.

Artemisia sp.

Parrotia sp.

Aster type

Persicaria sp.

Asteraceae

Picea sp.

Asteraceae: Asteroideae

Pinaceae indet.

Asteraceae: Cichorioideae

Pinus diploxylon-type

Betula sp.

Cathaya sp.

Brassicaceae

Trifolium sp.

Buxus sp.

Pistacia sp.

Caprifoliaceae: Caprifolioideae

Plantaginaceae

Caprifoliaceae: Dipsacoideae

Platanus sp.

Carpinus betulus type

Platycarya sp.

Carpinus orientalis/Ostrya type

Poaceae

Carya sp. 1 and sp. 2

Polygonum sp.

Caryophyllaceae

Polypodiaceae

Castanea sp.

Polypodiosporites sp.

Castanopsis sp.

Potamogeton sp.

Cedrus sp.

Pteridium sp.

Celtis sp.

Pteridophyta

Centaurea sp.

Pterocarya sp. 1 and sp. 2

cf. Altingia

Quercus sp. 1 and sp. 2

cf. Glyptostrobus

Ranunculaceae

Cornus sp.

Rosaceae

Corrugatosporites sp.

Rubiaceae

Corylopsis sp.

Salix sp.

Corylus sp.

Sapotaceae

Cupressaceae (Cupressus-Juniperus-type)

Sciadopitys sp.

Cyperaceae

Selaginella sp.

Cyrillaceae/Clethraceae

Sequoia-type sp.

Echinatisporis sp.

Sparganium sp.

Engelhardia sp. 1 and sp. 2

Symplocos sp.

Ephedra sp.

Tamarix sp.

Equisetum sp.

‘Taxodioid’ Cupressaceae

cf. Euphorbia

Thalictrum sp.

Ericaceae

Tilia sp.

Eucommia sp.

Tricolporopollenites sibiricum

Fabaceae

Tsuga canadensis-type

Fagus sp.

Tsuga heterophylla-type

Fraxinus sp.

Tsuga sp.

Hedera sp.

Typha sp.

Humulus/Cannabis type

Typha/Sparganium

Ilex sp.

Ulmus sp.

Juglans sp. 1 and sp. 2

Urtica sp.

cf. Keteeleria

Verrucatosporites sp.

Laevigatosporites

Viburnum sp.

Liliaceae

Vitaceae

Liquidambar sp.

Zelkova sp.

Lonicera sp.

Botryococcus sp.