1. species: Quercus petraea (Matt.) Liebl. – Crach Dderw

    Crach Dderw, Sessile Oak, Durmast Oak, Derwen Ddigoes, Derwen Mes Di-Goes, Derwen Fawr Ganghennog

    Taxon group: flowering plant

    Quercus
    Quercus petraea (Matt.) Liebl.
    Quercus petraea

  2. species: Quercus phillyreoides A. Gray

    Taxon group: flowering plant

    Quercus phillyreoides A. Gray
    Quercus
    Quercus phillyreoides

  3. species: Quercus maxima (Marshall) Ashe.

    Taxon group: flowering plant

    Quercus maxima (Marshall) Ashe.
    Quercus
    Quercus maxima

  4. species: Quercus ambigua Michaux f.

    Taxon group: flowering plant

    Quercus
    Quercus ambigua
    Quercus ambigua Michaux f.

  5. species: Quercus mas Thore

    Taxon group: flowering plant

    Quercus mas
    Quercus mas Thore
    Quercus

  6. species: Quercus frainetto

    Taxon group: flowering plant

    Quercus
    Quercus frainetto

  7. species: Megaselia petraea Schmitz, 1934

    Taxon group: insect - true fly (Diptera)

    Megaselia petraea
    Megaselia petraea Schmitz, 1934

  8. species: Quercus imbricaria Michx. – Shingle Oak

    Taxon group: flowering plant

    Quercus
    Quercus imbricaria
    Quercus imbricaria Michx.

  9. species: Microperella quercus Höhn.

    Taxon group: fungus

    Microperella quercus Höhn.
    Microperella quercus

  10. species: Phomopsis quercus (Sacc. & Speg.) Curzi & Barbaini

    Taxon group: fungus

    Phomopsis quercus (Sacc. & Speg.) Curzi & Barbaini
    Phomopsis quercus