UNDER CONSTRUCTION
Native Trees of Orange County, California
1. PINUS ATTENUATA
Knob-Cone Pine.
30 ft. Known from one grove of about 1,000 trees on Pleasants Peak, Santa Ana Mountains.
2. PINUS CULTERI
Coulter or Big Cone Pine.
70 ft. Fairly abundant on the high slopes in the vicinity of Santiago Peak, Santa Ana Mountains.
3. PSEUDOTSUGA MACROCARPA
Big-Cone Spruce.
70 ft. Common in nearly all of the higher canyons of the Santa Ana Mountains.
4. CUPRESSUS FORBESI
Tecate Cypress.
30 ft. Several thousand trees on the slopes of Sierra Peak, north end of Santa Ana Mountains.
5. JUNIPERUS CALIFORNICA
California Juniper.
25 ft. Rare in San Juan Canyon above San Juan Capistrano.
6. POPULUS FREMONTI PUBESCENS
Freemont Cottonwood.
50 ft. Very abundant along the Santa Ana River and other streams of the county.
7. POPULUS TRICHOCARPA
Black Cottonwood.
80 ft. Common along the Santa Ana River and upper canyons of the Santa Ana Mountains.
8. SALIX GOODDINGI
Willow.
30 ft. Very common throughout the county in wet spots. Leaves: greyish green on both sides, narrow.
9. SALIX LAEVIGATA
Willow.
30 ft. Less common than the others; but grows with them; leaves tapering to a point, gray beneath.
10. SALIX LASIOLEPIS
Willow.
30 ft. Very abundant in all wet spots; leaves gray beneath, widest above the middle.
11. JUGLANS CALIFORNICA
Southern California Black Walnut.
40 ft. An abundant tree in heavy soils of the Chino-Puente Hills.
11. ALNUS RHOMBIFOLIA
White Alder.
50 ft. Sparingly along the Santa Ana River; common in Trabuco and other moist canyons of the Santa Ana Mountains.
12. QUERCUS AGRIFOLIA
California Live Oak.
50 ft. Our most common oak; in all of the foothills, especially fine at Orange County Park.
13. QUERCUS CHRYSOLEPIS
Golden Cup Oak.
50 ft. A few fine groves on the slopes of Santiago Peak and in Upper Trabuco Canyon, Santa Ana Mountains.
14. QUERCUS WISLIZENI FRUTESCENS
Scrub Sierra Live Oak.
25 ft. High ridges of Santa Ana Mountains; this form rarely much of a tree.
15. QUERCUS ENGELMANNI
Mesa Oak.
40 ft. A few trees on the slopes of Sierra Peak, Santa Ana Mountains. (This is the common oak around Pasadena)
16. QUERCUS DUMOSA
Scrub Oak.
20 ft. A common shrub of the Santa Ana Mountains, occasional elsewhere; sometimes reaches treelike size.
17. UMBELLULARIA CALIFORNICA
California Bay Tree.
40 ft. Scattered in the higher canyons and slopes of the Santa Ana Mountains.
18. PLATANUS RACEMOSA
California Sycamore.
80 ft. In almost every canyon of the county, especially fine at Orange County Park.
19. PHOTINIA ARBUTIFOLIA
Toyon or California Holly.
30 ft. Usually shrubby, but sometimes treelike; throughout the County in the hills.
20. RHUS INTEGRIFOLIA
Lemonade Berry.
20 ft. Usually shrubby, but occasionally treelike; throughout the hills of the County.
21. RHUS OVATA
Sugar Bush.
20 ft. Also mainly shrubby, but sometimes treelike; Santa Ana Mountains and Puente Hills.
22. ACER MACROPHYLLUM
Big Leaf Maple.
50 ft. Occasional in all of the higher moist canyons of the Santa Ana Mountains; grows rapidly.
23. CEANOTHUS SPINOSUS
Red Heart (A Wild Lilac).
25 ft. Trabuco Canyon, Santa Ana Mountains; usually shrubby.
24. ARBUTUS MENZIESI
Madrone.
30 ft. Known in the county only from a couple of groves in Trabuco Canyon; abundant in Northern California.
25. FRAXINUS DIPETALA
Flowering Ash.
20 ft. A common small tree of the chaparral slopes of the County.
26. FRAXINUS VELUTINA CORIACEA
Leather Leaf Ash.
30 ft. A few trees along the Santa Ana River in the Santa Ana Canyon.
27. SAMBUCUS COERULEA
Elderberry.
20 ft. A very common tree; fruits abundantly; either white or purple, edible - used for wines and pies.
Knob-Cone Pine.
30 ft. Known from one grove of about 1,000 trees on Pleasants Peak, Santa Ana Mountains.
2. PINUS CULTERI
Coulter or Big Cone Pine.
70 ft. Fairly abundant on the high slopes in the vicinity of Santiago Peak, Santa Ana Mountains.
3. PSEUDOTSUGA MACROCARPA
Big-Cone Spruce.
70 ft. Common in nearly all of the higher canyons of the Santa Ana Mountains.
4. CUPRESSUS FORBESI
Tecate Cypress.
30 ft. Several thousand trees on the slopes of Sierra Peak, north end of Santa Ana Mountains.
5. JUNIPERUS CALIFORNICA
California Juniper.
25 ft. Rare in San Juan Canyon above San Juan Capistrano.
6. POPULUS FREMONTI PUBESCENS
Freemont Cottonwood.
50 ft. Very abundant along the Santa Ana River and other streams of the county.
7. POPULUS TRICHOCARPA
Black Cottonwood.
80 ft. Common along the Santa Ana River and upper canyons of the Santa Ana Mountains.
8. SALIX GOODDINGI
Willow.
30 ft. Very common throughout the county in wet spots. Leaves: greyish green on both sides, narrow.
9. SALIX LAEVIGATA
Willow.
30 ft. Less common than the others; but grows with them; leaves tapering to a point, gray beneath.
10. SALIX LASIOLEPIS
Willow.
30 ft. Very abundant in all wet spots; leaves gray beneath, widest above the middle.
11. JUGLANS CALIFORNICA
Southern California Black Walnut.
40 ft. An abundant tree in heavy soils of the Chino-Puente Hills.
11. ALNUS RHOMBIFOLIA
White Alder.
50 ft. Sparingly along the Santa Ana River; common in Trabuco and other moist canyons of the Santa Ana Mountains.
12. QUERCUS AGRIFOLIA
California Live Oak.
50 ft. Our most common oak; in all of the foothills, especially fine at Orange County Park.
13. QUERCUS CHRYSOLEPIS
Golden Cup Oak.
50 ft. A few fine groves on the slopes of Santiago Peak and in Upper Trabuco Canyon, Santa Ana Mountains.
14. QUERCUS WISLIZENI FRUTESCENS
Scrub Sierra Live Oak.
25 ft. High ridges of Santa Ana Mountains; this form rarely much of a tree.
15. QUERCUS ENGELMANNI
Mesa Oak.
40 ft. A few trees on the slopes of Sierra Peak, Santa Ana Mountains. (This is the common oak around Pasadena)
16. QUERCUS DUMOSA
Scrub Oak.
20 ft. A common shrub of the Santa Ana Mountains, occasional elsewhere; sometimes reaches treelike size.
17. UMBELLULARIA CALIFORNICA
California Bay Tree.
40 ft. Scattered in the higher canyons and slopes of the Santa Ana Mountains.
18. PLATANUS RACEMOSA
California Sycamore.
80 ft. In almost every canyon of the county, especially fine at Orange County Park.
19. PHOTINIA ARBUTIFOLIA
Toyon or California Holly.
30 ft. Usually shrubby, but sometimes treelike; throughout the County in the hills.
20. RHUS INTEGRIFOLIA
Lemonade Berry.
20 ft. Usually shrubby, but occasionally treelike; throughout the hills of the County.
21. RHUS OVATA
Sugar Bush.
20 ft. Also mainly shrubby, but sometimes treelike; Santa Ana Mountains and Puente Hills.
22. ACER MACROPHYLLUM
Big Leaf Maple.
50 ft. Occasional in all of the higher moist canyons of the Santa Ana Mountains; grows rapidly.
23. CEANOTHUS SPINOSUS
Red Heart (A Wild Lilac).
25 ft. Trabuco Canyon, Santa Ana Mountains; usually shrubby.
24. ARBUTUS MENZIESI
Madrone.
30 ft. Known in the county only from a couple of groves in Trabuco Canyon; abundant in Northern California.
25. FRAXINUS DIPETALA
Flowering Ash.
20 ft. A common small tree of the chaparral slopes of the County.
26. FRAXINUS VELUTINA CORIACEA
Leather Leaf Ash.
30 ft. A few trees along the Santa Ana River in the Santa Ana Canyon.
27. SAMBUCUS COERULEA
Elderberry.
20 ft. A very common tree; fruits abundantly; either white or purple, edible - used for wines and pies.