Loading species data...
Fetching observations
bur oak
Quercus macrocarpa
2,049 observations
eastern black walnut
Juglans nigra
1,817 observations
white oak
Quercus alba
1,396 observations
shagbark hickory
Carya ovata
1,263 observations
American hazelnut
Corylus americana
1,049 observations
American hophornbeam
Ostrya virginiana
919 observations
northern red oak
Quercus rubra
745 observations
shingle oak
Quercus imbricaria
620 observations
swamp white oak
Quercus bicolor
582 observations
chinkapin oak
Quercus muehlenbergii
560 observations
bitternut hickory
Carya cordiformis
548 observations
American hornbeam
Carpinus caroliniana
526 observations
American beech
Fagus grandifolia
473 observations
black oak
Quercus velutina
442 observations
blackjack oak
Quercus marilandica
323 observations
pin oak
Quercus palustris
301 observations
river birch
Betula nigra
270 observations
common alder
Alnus glutinosa
253 observations
post oak
Quercus stellata
228 observations
Butternut
Juglans cinerea
145 observations
northern pin oak
Quercus ellipsoidalis
140 observations
cherrybark oak
Quercus pagoda
127 observations
swamp birch
Betula pumila
101 observations
Shellbark Hickory
Carya laciniosa
90 observations
mockernut
Carya tomentosa
88 observations
overcup oak
Quercus lyrata
81 observations
swamp chestnut oak
Quercus michauxii
78 observations
sweetfern
Comptonia peregrina
73 observations
southern red oak
Quercus falcata
70 observations
pecan
Carya illinoinensis
68 observations
pignut hickory
Carya glabra
66 observations
paper birch
Betula papyrifera
65 observations
willow oak
Quercus phellos
57 observations
smooth alder
Alnus serrulata
55 observations
Black Hickory
Carya texana
54 observations
Shumard oak
Quercus shumardii
52 observations
chestnut oak
Quercus montana
37 observations
Sawtooth oak
Quercus acutissima
34 observations
scarlet oak
Quercus coccinea
33 observations
Chinese chestnut
Castanea mollissima
29 observations
grey alder
Alnus incana
18 observations
water hickory
Carya aquatica
17 observations
European beech
Fagus sylvatica
12 observations
American chestnut
Castanea dentata
10 observations
silver birch
Betula pendula
9 observations
red hickory
Carya ovalis
9 observations
gray birch
Betula populifolia
8 observations
yellow birch
Betula alleghaniensis
7 observations
English oak
Quercus robur
7 observations
Lea oak
Quercus × leana
4 observations
Frequently Asked Questions
- The 10 most common deciduous trees in Illinois are:
- bur oak (Quercus macrocarpa)
- eastern black walnut (Juglans nigra)
- white oak (Quercus alba)
- shagbark hickory (Carya ovata)
- American hazelnut (Corylus americana)
- American hophornbeam (Ostrya virginiana)
- northern red oak (Quercus rubra)
- shingle oak (Quercus imbricaria)
- swamp white oak (Quercus bicolor)
- chinkapin oak (Quercus muehlenbergii)
- The most observed deciduous tree in Illinois is bur oak (Quercus macrocarpa), with 2,049 recorded observations.