Flora of Pennsylvania

Trees and Shrubs with Catkins

Trees and Shrubs with Catkins

Betulaceae

birch family

Alnus
Alnus
 alder 
A. serrulata
smooth alder
Betula
Betula
 birch 
B. alleghaniensis
yellow birch
B. lenta
black birch
B. papyrifera
paper birch
B. populifolia
gray birch
Carpinus
Carpinus
 hornbeam 
C. caroliniana
American hornbeam
Corylus
Corylus
 hazelnut 
C. americana
American hazelnut
Ostrya
Ostrya
 hophornbeam 
O. virginiana
eastern hophornbeam
Fagaceae

beech family

Castanea
Castanea
 chestnut 
C. dentata
American chestnut
Fagus
Fagus
 beech 
F. grandifolia
American beech
Quercus
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
Morus
 mulberry 
M. alba
white mulberry
Salicaceae

willow family

Populus
Populus
 poplar 
P. deltoides
eastern cottonwood
P. grandidentata
bigtooth aspen
P. tremuloides
quaking aspen
Salix
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
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
Ulmus
 elm 
U. americana
American elm
U. pumila
Siberian elm
U. rubra
slippery elm