Ptelea cf trifoliata 1 Lund Bot Garden 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 10 Lund Bot Garden 090911 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 11 Lund Bot Garden 090911 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 2 Lund Bot Garden 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 3 Lund Bot Garden 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 4 Lund Bot Garden 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 5 Lund Bot Garden 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 6 Lund Bot Garden 090911 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 7 Lund Bot Garden 090911 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 8 Lund Bot Garden 120705 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea cf trifoliata 9 Lund Bot Garden 090911 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea tomentosa 1 Copenhagen Bot Garden 130913 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea tomentosa 2 Copenhagen Bot Garden 130913 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea tomentosa 3 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea tomentosa 4 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea tomentosa 5 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Ptelea tomentosa 6 Copenhagen Bot Garden 150626 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).