Studies of the blossoms, fruits and trunk of an English oak (Quercus robur)1788Studies of the trunk, blossoms and fruit of a wild apple tree (Malus sylvestris)1788Studies of the leaves, blossoms, fruits and trunk of a whitebeam (Sorbus subgenus Aria)1788Studies of the leaves, blossoms, fruits and trunk of an English elm (Ulmus procera)1788