Cheat sheet

Species Length of
petiole		 Hairiness on
petiole		 Hairiness on
main vein		 Hair type
Pedunculate oak
(Quercus robur)
no hairs
Sessile oak
(Quercus petraea)

stellate hair
Downy oak
(Quercus pubescens)

clustered hair
Hybrids intermediate or characteristics of both parental species

Select the oak species in the triangle.

Petiole length

Pedunculate oak

Pedunculate x sessile oak hybrid

Sessile oak

Sessile x downy oak hybrid

Downy oak

Downy x pedunculate oak hybrid

ROB