Flora of Pennsylvania
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Contributors
Trees and Shrubs with Catkins
Trees and Shrubs with Catkins
Betulaceae
birch family
Alnus
alder
A. serrulata
smooth alder
Betula
birch
B. alleghaniensis
yellow birch
B. lenta
black birch
B. papyrifera
paper birch
B. populifolia
gray birch
Carpinus
hornbeam
C. caroliniana
American hornbeam
Corylus
hazelnut
C. americana
American hazelnut
Ostrya
hophornbeam
O. virginiana
eastern hophornbeam
Fagaceae
beech family
Castanea
chestnut
C. dentata
American chestnut
Fagus
beech
F. grandifolia
American beech
Quercus
oak
Q. alba
white oak
Q. bicolor
white swamp oak
Q. coccinea
scarlet oak
Q. ilicifolia
scrub oak
Q. macrocarpa
bur oak
Q. montana
chestnut oak
Q. muehlenbergii
chinquapin oak
Q. palustris
pin oak
Q. prinoides
dwarf chestnut oak
Q. rubra
northern red oak
Q. velutina
black oak
Moraceae
mulberry family
Morus
mulberry
M. alba
white mulberry
Salicaceae
willow family
Populus
poplar
P. deltoides
eastern cottonwood
P. grandidentata
bigtooth aspen
P. tremuloides
quaking aspen
Salix
willow
S. babylonica
weeping willow
S. bebbiana
long-beaked willow
S. eriocephala
diamond willow
S. humilis
prairie willow
S. nigra
black willow
S. petiolaris
meadow willow
S. sericea
silky willow
Sapindaceae
soapberry family
Acer
maple
A. japonicum
Japanese maple
A. negundo
box elder
A. pensylvanicum
striped maple
A. platanoides
Norway maple
A. pseudoplatanus
sycamore maple
A. rubrum
red maple
A. saccharinum
silver maple
A. saccharum
sugar maple
A. spicatum
mountain maple
Ulmaceae
elm family
Ulmus
elm
U. americana
American elm
U. pumila
Siberian elm
U. rubra
slippery elm