Twig Key

So far you have made the following choices...

It could be one of the species in the table below. Let's narrow our choices by looking at the shape of the twig.


Family Genus Species common name
Betulaceae Alnus glutinosa European black alder
Betulaceae Alnus rhombifolia white alder
Betulaceae Alnus rubra red alder
Betulaceae Alnus rugosa speckled alder
Betulaceae Alnus serrulata hazel alder
Betulaceae Alnus sinuata Sitka alder
Fagaceae Castanea dentata American chestnut
Fagaceae Castanea mollissima Chinese chestnut
Fagaceae Castanea pumila Alleghany chinkapin
Hamamelidaceae Liquidambar styraciflua sweetgum
Hippocastanaceae Aesculus californica California buckeye
Juglandaceae Carya aquatica water hickory
Juglandaceae Carya glabra pignut hickory
Juglandaceae Carya laciniosa shellbark hickory
Juglandaceae Carya ovata shagbark hickory
Juglandaceae Carya pallida sand hickory
Juglandaceae Carya tomentosa mockernut hickory
Lauraceae Sassafras albidum sassafras
Moraceae Morus rubra red mulberry
Nyssaceae Nyssa aquatica water tupelo
Nyssaceae Nyssa biflora swamp tupelo
Nyssaceae Nyssa sylvatica blackgum
Salicaceae Populus balsamifera balsam poplar
Salicaceae Populus deltoides cottonwood
Salicaceae Populus grandidentata bigtooth aspen
Salicaceae Populus heterophylla swamp cottonwood
Salicaceae Populus tremuloides quaking aspen
Salicaceae Populus trichocarpa black cottonwood
Ulmaceae Ulmus alata winged elm
Ulmaceae Ulmus americana American elm
Ulmaceae Ulmus rubra slippery elm
Ulmaceae Ulmus thomasii rock elm
Ulmaceae Zelkova serrata Japanese zelkova


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