Genera

Angiosperms

Gymnosperms

Acacia
Acer
Aesculus
Ailanthus
Alnus
Amelanchier
Arbutus
Arctostaphylos
Artemisia
Asiminia
Atriplex
Betula
Campsis
Carpinus
Carya
Castanea
Catalpa
Ceanothus
Celastrus
Celtis
Cephalanthus
Cercidium
Cercis
Chrysothamnus
Chilopsis
Cladrastis
Coleogynia
Cornus
Corylus
Cowania

Crataegus
Diospyros
Elaeagnus
Euonymus
Fagus
Fraxinus
Gleditsia
Gymnocladus
Hamamelis
Ilex
Juglans
Kalmia
Larrea
Liquidambar
Liriodendron
Lonicera
Maclura
Magnolia
Malus
Menispermum
Morus
Myrica
Nyssa
Ostrya
Oxydendron
Parthenocissus
Platanus
Populus

Prosopis
Prunus
Ptelea
Purshia
Quercus
Rhamnus
Rhododendron
Rhus
Ribes
Robinia
Rosa
Rubus
Salix
Sambucus
Sassafras
Shepherdia
Smilax
Sophora
Sorbus
Staphylea
Symphoricarpos
Tilia
Ulmus
Umbellularia
Vaccinium
Viburnum
Vitis
Zanthoxylum

Abies
Chamaecyparis
Cupressus
Ephedra
Ginkgo
Juniperus
Larix
Libocedrus
Picea
Pinus
Pseudotsuga
Sequoia
Taxodium
Taxus
Thuja
Tsuga