Birch, beech, ash
a) Birch b) Beech c) Ash
d) Narrow-leaved ash e) Flowering ash
Oak, poplar, maple
f) Sessile oak g) Poplar h) Field maple
i) Italian maple
Fruit trees
j) White mulberry
Conifers
k) Aleppo pine l) European larch m) Norway spruce
Shrubs
n) Hawthorn o) Honeysuckle p) Wayfaring tree
Photos courtesy of: Innes et al. 2001, (a) Birch (Betula pendula); (b) Beech (Fagus sylvatica); (c) Ash (Fraxinus excelsior) (www.ozone.wsl.ch); V. Calatayud, (d) Narrow-leaved ash (Fraxinus angustifolia); (e) Flowering ash (Fraxinus ornus) (www.ozoneinjury.org); (f) M. Broadmeadow, Sessile oak (Quercus petraea); (g) V. Calatayud Poplar (Populus nigra); (h) V. Calatayud and M.J. Sanz, Field maple (Acer campestre); V. Calatayud, (i) Italian maple (Acer opalus); (j) White mulberry (Morus alba) (www.ozoneinjury.org); (k) D. Velissariou, Aleppo pine (Pinus halepensis); (l) L. Dalstein (G.I.E.F.S), European larch (Larix decidua) (www.ozone-pollution.com); (m) N. Vas (G.I.E.F.S), Norway spruce (Picea abies) (www.ozone-pollution.com): (n) Innes et al. 2001, Hawthorn (Crataegus monogyna) (www.ozone.wsl.ch); (o) M. J. Sanz and V. Calatayud, Honeysuckle (Lonicera implexa) (www.ozoneinjury.org); (p) Innes et al. 2001, Wayfaring tree (Viburnum lantana) (www.ozone.wsl.ch).