Appendix H – Tree Inventory of Seven Properties in the Stanford
Research Park Area, Palo Alto Recycled Water Project, Phase 3
Tree Inventory of Seven Properties in
the Stanford Research Park Area
Palo Alto Recycled Water Project
Phase 3
Prepared for:
RMC Water and Environment
222 Sutter Street, Suite 700
San Francisco, CA 94108
Prepared by:
HortScience, Inc.
325 Ray St.
Pleasanton, CA 94566
October 18, 2011
Tree Inventory of Seven Properties in the Stanford Research Park Area
Palo Alto Recycled Water Project, Phase 3
Palo Alto, CA
RMC Water and Environment is preparing an Environmental Impact Report for the Palo Alto
Recycled Water Project, Phase 3. The project site is located in the Stanford Research Park
area. HortScience, Inc. was asked to contribute to that effort by preparing an Evaluation of Use
of Recycled Water for Landscape Irrigation (June 2011). That report described the results of
landscape investigations conducted in June 2010 at seven properties in Palo Alto. At each
property we investigated the soil characteristics, identified the plant taxa present and described
the general condition and relative frequency of occurrence of the taxon in the landscape. In
addition we estimated salt tolerance (high, moderate, low) of each species.
The City of Palo Alto has requested further information about the trees on each site. During
October we performed the following:
1. At each of the seven sites (Fig. 1, Appendix), count the number of trees and identify by
species.
2. Identify all Protected trees as defined in City of Palo Alto Municipal Code, Title 8, Trees
& Vegetation which are: Quercus agrifolia, Q. lobata >11.5” trunk diameter at 4.5’;
Sequoia sempervirens >18” trunk diameter at 4.5’.
3. Estimate the tolerance of each species to recycled water that will be supplied by the
Palo Alto Regional Water Quality Control Plant (RWQCP), based on water quality data
provided by the City of Palo Alto for Nov. 2008-Aug. 2010 (Table 1).
Table 1: Summary of RWQCP reclaimed water analyses for Nov. 2008 – August 2010
Parameter
TDS (mg/l)
ECw (µmho/cm)
Boron (B, mg/l)
Maximum
Mean
Salinity
1
Hazard
870
1000
963
slight
1518
1760
1656
moderate
0.31
Al
0.35
none
Chloride (Cl, mg/l)
308
384
339
moderate
Sodium (Na, mg/l)
170
240
211
moderate
Sodium adsorption ratio
5.3
5.9
5.0
none
Alkalinity
85
196
114
none
Nitrate (NO3, mg/l)
19
26
23
none
pH
1
Minimum
6.6
7.2
7.0
none
Refer to Evaluating Water Quality, Appendix 1, in Evaluation of Use of Recycled Water for
Landscape Irrigation (HortScience, Inc., June 2011).
Tree Inventory of Seven Properties, Stanford Research Park Area
Palo Alto Recycled Water Project, Phase 3
October 18, 2011
Results of Study
The results of our tree inventory are detailed by site in the Appendix. A summary is provided in
Table 2.
Table 2: Number of non-protected and protected trees at each site distributed by
tolerance to PARWQCP recycled water.
Number of Trees
Site
Number
of taxa
Not Protected
Protected
#
Trees
High
Moderate
Low
#
Trees
High
Moderate
Low
Theranos
15
95
58
28
9
4
4
0
0
VMware
25
626
246
188
192
114
7*
0
107
Clocktower
21
210
45
68
97
25
0
0
25
Mitchell Park
44
344
122
134
88
18
1
1
16
Terman Park
Hewlett
Packard
34
136
16
50
70
37
13
0
24
46
770
230
194
346
141
7
40
94
Tesla Motors
26
428
308
97
23
107
81
26
0
2609
1025
759
825
446
113
67
266
100%
39%
29%
32%
100%
25%
15%
60%
Total, all
sites
% of trees, all
sites
+
96
*Three trees were in decline with removal notices attached.
+Duplicates excluded
A total of 2609 non-protected trees, representing 96 taxa, were present at the seven sites.
Approximately half of the non-protected trees were located at the Hewlett Packard (29%) and
VM Ware (24%) sites.
A total of 446 protected trees, representing three taxa, were present at the seven sites. Eightytwo percent of the protected trees were located at the Hewlett Packard (32%), VM Water (26%)
and Tesla Motors (24%) sites. Of the protected trees, 25% were coast live oak, 15% valley oak,
and 60% coast redwood.
The current study differed from the 2010 study in tree taxa encountered at several locations: At
the Hewlett Packard site, a parking area had been re-landscaped, adding over 100 trees.
Similarly, a new section at VMware was landscaped. A mature weeping willow at Clocktower
had died and removed from the inventory. The interior of the Terman Middle School campus
was not accessible during the 2010 inventory; those trees were added in the current study.
Finally, an unirrigated portion of Tesla property was excluded in the 2010 inventory; we added
that area in the current study. Because of these changes, eight taxa were added.
HortScience, Inc.
Page 2
Tree Inventory of Seven Properties, Stanford Research Park Area
Palo Alto Recycled Water Project, Phase 3
October 18, 2011
The tolerance of each taxa to RWQCP recycled water that will be supplied by the Palo Alto
Regional Water Quality Control Plant was estimated based on information available in the
literature and our experience with the species in landscapes irrigated with recycled water and
potable waters having similar salt concentrations. Each taxon was rated for salt tolerance (see
tables in the Appendix). Of the 96 tree taxa present, 31% were rated as ‘high’, 34% as
‘moderate’, and 31% as ‘low’.
Salt tolerance ratings for the total population of 2609 non-protected trees and 446 protected
trees were as follows:
•
39% of the non-protected and 25% of the protected trees had ‘high’ salt tolerance.
These plants are expected to maintain good appearance and health with appropriate
irrigation with RWQCP recycled water.
•
29% of the non-protected and 15% of the protected trees had ‘moderate’ salt tolerance.
These plants are expected to develop symptoms of salt stress when irrigated with
current RWQCP recycled water, especially in poorly drained soils. These plants may
show some damage, but appearance will likely be acceptable when viewed from several
feet away. Regular and thorough leaching will be required to maintain these plants.
•
32% of the non-protected and 60% of the protected trees had low salt tolerance. Foliage
damage to these plants is likely to be obvious and degrade plant appearance. It is
unlikely that leaching treatments using current recycled water would be adequate to
prevent plant damage.
HortScience, Inc.
Nelda Matheny, M. S.
Board Certified Master Arborist WE-0195B
Registered Consulting Arborist #243
Attachments: Study Site Locations Map
All Sites Tree Count
Theranos Tree Count
VMware Tree Count
Clocktower Tree Count
Mitchell Park Tree Count
Terman Park and School Tree Count
Hewlett Packard Tree Count
Tesla Motors Tree Count
HortScience, Inc.
Page 3
Mitchell
Park
Fig. 1
Study Site Locations
Palo Alto Recycled
Water Project
Clocktower
Phase 3
Hewlett
Packard
Property
Theranos
3200 Hillview
VMWare
3401 Hillview
Theranos
Clocktower
600-660 Hansen Wy.
VMWare
Terman
Mitchell Park
600 East Meadow Dr.
Terman Park
655 Arastradero Rd.
Hewlett Packard
3000 Hanover St.
Tesla Motors
3500 Deer Creek Rd.
Tesla
All Sites - Tree Count
Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
Callistemon viminalis
Weeping bottlebrush
high
16
Casuarina cunninghamiana
River she-oak
high
69
Cupressus arizonica
Arizona cypress
high
1
Eucalyptus camadulensis
River red gum
high
2
Eucalyptus globulus
Blue gum
high
60
Eucalyptus globulus ' Compacta'
Dwarf blue gum
high
6
Eucalyptus leucoxylon
White ironbark
high
24
Eucalyptus polyanthemos
Silver dollar gum
high
24
Eucalyptus sideroxylon
Red ironbark
high
3
Eucalyptus viminalis
Manna gum
high
3
Gleditsia triacanthos
Honeylocust
high
12
Leptospermum scoparium
New Zealand tea tree
high
39
Maytenus boaria
Mayten
high
16
Olea europaea
Olive
high
20
Pinus canariensis
Canary Island pine
high
65
Pinus halepensis
Aleppo pine
high
22
Pinus radiata
Monterey pine
high
53
Pyrus calleryana
Callery pear
high
14
Pyrus kawakamii
Evergreen pear
high
22
Quercus agrifolia
Coast live oak
high
344
Quercus ilex
Holly oak
high
13
Quercus macrocarpa
Burr oak
high
4
Quercus rubra
Red oak
high
50
Quercus suber
Cork oak
high
4
Quercus virginiana
Southern live oak
high
64
Querus robur ' Fastigiata'
Fastigate English oak
high
3
Robinia pseudoacacia
Black locust
high
1
Schinus molle
California pepper
high
39
Schinus terebinthifolius
Brazillian pepepr
high
5
Trachycarpus fortunei
Windmill palm
high
5
Pinus pinea
Italian stone pine
high
32
Acer palmatum
Japanese maple
low
27
Acer rubrum
Red maple
low
41
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
113
Page 1
All Sites - Tree Count
Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
Aesculus californica
California buckeye
low
10
Albizia julibrissin
Silk tree
low
4
Alnus rhombifolia
White alder
low
27
Betula pendula
European white birch
low
31
Calocedrus decurrens
Incense cedar
low
2
Celtis occidentalis
Common hackberry
low
4
Cercis canadensis
Eastern redbud
low
26
Citrus x limon
Lemon
low
1
Diospyros kaki
Persimmon
low
2
Fagus sylvatica ' Autropunicea'
Copper beech
low
1
Lagerstroemia indica
Crape myrtle
low
22
Liquidambar stryraciflua
Sweet gum
low
148
Liriodendron tulipifera
Tulip tree
low
19
Magnolia grandiflora
Southern magnolia
low
60
Magnolia soulangiana
Tulip magnolia
low
1
Malus domestica
Apple
low
3
Malus floribunda
Flowering crabapple
low
18
Metasequoia glyptostroboides
Dawn redwood
low
8
Michelia doltsopa
Michelia
low
6
Pinus patula
Jelecote pine
low
1
Prunus armeniaca
Apricot
low
1
Prunus serrulata
Flowering cherry
low
5
Prunus x yedoensis ' Akebono'
Flowering cherry
low
3
Salix babylonica
Weeping willow
low
1
Salix
Willow
low
1
Sequoia sempervirens
Coast redwood
low
325
Sequoiadendron giganteum
Giant sequoia
low
7
Taxus baccata
English yew
low
14
Tilia tomentosa 'Sterling Silver'
Silver linden
low
7
Acacia baileyana
Bailey's acacia
moderate
7
Acacia melanoxylon
Blackwood acacia
moderate
6
Acer platanoides
Norway maple
moderate
1
Arbutus unedo
Strawberry tree
moderate
16
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
266
Page 2
All Sites - Tree Count
Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
Calodendrum capense
Cape chestnut
moderate
9
Cedrus atlantica
Atlas cedar
moderate
4
Cedrus deodara
Deodar cedar
moderate
25
Ceratonia siliqua
Carob
moderate
11
Cercidiphyllum japonicum
Katsura tree
moderate
2
Cercis occidentalis
Western redbud
moderate
17
Cinnamomum camphora
Camphor
moderate
10
Crataegus laevigata
English hawthorn
moderate
8
Cupressus macrocarpa
Monterey cypress
moderate
21
Eriobotrya japonica
Loquat
moderate
4
Fraxinus angustifolia 'Raywood'
Raywood ash
moderate
28
Fraxinus pennsylvanica ' Cimmzam' Cimmaron ash
moderate
6
Fraxinus uhedi
Evergreen ash
moderate
61
Geijera parviflora
Australian willow
moderate
5
Ginkgo biloba
Maidenhair tree
moderate
73
Juglans hindsii
California black walnut
moderate
1
Juniperus chinensis 'Kaizuka'
Hollywood juniper
moderate
6
Ligustrum lucidum
Glossy privet
moderate
9
Lophostemon confertus
Brisbane box
moderate
18
Melaleuca quinquenervia
Cajeput tree
moderate
4
Morus alba
Mulberry
moderate
9
Pistacia chinensis
Chinese pistache
moderate
81
Platanus x acerfolia
London plane
moderate
127
Podocarpus macrophyllus
Yew pine
moderate
5
Populus Fremontii
Fremont cottonwood
moderate
20
Prunus cerasifera ' Atropurpurea'
Purple-leaf plum
moderate
62
Quercus lobata
Valley oak
moderate
30
Robinia x ambigua ' Purple Robe'
Locust
moderate
23
Tipuana tipu
Tipu tree
moderate
3
Ulmus parvifolia
Chinese elm
moderate
36
Total number trees
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
2609
# Trees
Protected
67
446
Page 3
Theranos Tree Count
3200 Hillview, Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
moderate
1
high
6
Acer platanoides
Norway maple
Callistemon viminalis
Weeping bottlebrush
Cercidiphyllum japonicum
Katsura tree
moderate
2
Cercis occidentalis
Western redbud
moderate
1
Eucalyptus polyanthemos
Silver dollar gum
high
1
Fraxinus angustifolia 'Raywood'
Raywood ash
moderate
7
Lagerstroemia indica
Crape myrtle
low
9
Lophostemon confertus
Brisbane box
moderate
16
Melaleuca quinquenervia
Cajeput tree
moderate
1
Olea europaea
Olive
high
3
Pinus canariensis
Canary Island pine
high
8
Pinus radiata
Monterey pine
high
14
Quercus agrifolia
Coast live oak
high
2
Quercus rubra
Red oak
high
4
Quercus virginiana
Southern live oak
high
20
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
4
VMware Tree Count
3401 Hillview, Palo Alto
Scientific Name
Common Name
Salt
# Trees
Tolerance
Protected
Acer palmatum
Japanese maple
low
23
Aesculus californica
California buckeye
low
10
Alnus rhombifolia
White alder
low
22
Cedrus deodara
Deodar cedar
moderate
1
Cercis canadensis
Eastern redbud
low
25
Cupressus macrocarpa
Monterey cypress
moderate
21
Eucalyptus globulus
Blue gum
high
35
Eucalyptus sideroxylon
Red ironbark
high
1
Ginkgo biloba
Maidenhair tree
moderate
27
Magnolia grandiflora 'Little Gem'
Little Gem magnolia
low
31
Maytenus boaria
Mayten
high
12
Metasequoia glyptostroboides
Dawn redwood
low
8
Michelia doltsopa
Michelia
low
5
Pinus canariensis
Canary Island pine
high
36
Pinus radiata
Monterey pine
high
11
Pistacia chinensis
Chinese pistache
moderate
41
Platanus x acerifolia
London plane
moderate
50
Populus Fremontii
Fremont cottonwood
moderate
20
Prunus serrulata
Flowering cherry
low
1
Quercus agrifolia
Coast live oak
high
115
Quercus suber
Cork oak
high
1
moderate
23
Robinia x ambigua ' Purple Robe' Locust
Schinus molle
California pepper
high
35
Sequoia sempervirens 'Soquel'
Coast redwood
low
67
Ulmus parvifolia
Chinese elm
moderate
5
*Three trees in decline, with removal notices attached
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
Not
# Trees
Protected
7*
107
Clocktower Tree Count
600-660 Hansen Way, Palo Alto
Scientific Name
Common Name
Acacia melanoxylon
Blackwood acacia
Acer palmatum
Salt
Tolerance
# Trees
Protected
moderate
1
Japanese maple
low
2
Alnus rhombifolia
White alder
low
1
Arbutus unedo
Strawberry tree
moderate
4
Betula pendula
European white birch
low
22
Cedrus deodara
Deodar cedar
moderate
12
Eucalyptus globulus
Blue gum
high
20
Eucalytpus polyanthemos
Silver dollar gum
high
3
Fraxinus uhdei
Evergreen ash
moderate
40
Liquidambar stryraciflua
Sweet gum
low
44
Magnolia grandiflora
Southern magnolia
low
1
Magnolia soulangiana
Tulip magnolia
low
1
Michelia doltsopa
Michelia
low
1
Pinus canariensis
Canary Island pine
high
5
Prunus cerasifera ' Atropurpurea'
Purple-leaf plum
moderate
11
Prunus x yedoensis ' Akebono'
Flowering cherry
low
3
Pyrus kawakamii
Evergreen pear
high
12
Quercus agrifolia
Coast live oak
high
3
Quercus ilex
Holly oak
high
2
Sequoia sempervirens ' Soquel'
Coast redwood
low
22
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
Not
# Trees
Protected
0
25
Mitchell Park Tree Count
3800 Middlefield Rd., Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
Acer rubrum
Red maple
low
41
Albizia julibrissin
Silk tree
low
1
Betula pendula
European white birch
low
2
Calodendrum capense
Cape chestnut
moderate
9
Casurina cunninghamiana
River she-oak
high
10
Cedrus atlantica ' Glauca'
Atlas cedar
moderate
1
Cedrus deodara
Deodar cedar
moderate
11
Celtis occidentalis
Common hackberry
low
4
Ceratonia siliqua
Carob
moderate
11
Cinnamomum camphora
Camphor
moderate
7
Cupressus arizonica
Arizona cypress
high
1
Eucalyptus polyanthemos
Silver dollar gum
high
17
Fraxinus pennsylvanica ' Cimmzam'
Cimmaron ash
moderate
6
Fraxinus uhedi
Evergreen ash
moderate
19
Ginkgo biloba
Maidenhair tree
moderate
7
Juglans hindsii
California black walnut
moderate
1
Juniperus chinensis 'Kaizuka'
Hollywood juniper
moderate
5
Liquidambar styraciflua
Sweetgum
low
1
Magnolia grandiflora
Southern magnolia
low
4
Malus floribunda
Flowering crabapple
low
5
Maytenus boaria
Mayten
high
3
Morus alba
Mulberry
moderate
8
Olea europaea
Olive
high
13
Pinus canariensis
Canary Island pine
high
13
Pinus patula
Jelecote pine
low
1
Pinus pinea
Italian stone pine
high
22
Pinus radiata
Monterey pine
high
16
Pistacia chinensis
Chinese pistache
moderate
1
Platanus x acerifolia ' Bloodgood'
London plane
moderate
33
Podocarpus marcrophyllus ' Maki'
Yew pine
moderate
2
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
Mitchell Park Tree Count
3800 Middlefield Rd., Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
Pyrus calleryana
Callery pear
high
13
Quercus agrifolia
Coast live oak
high
0
Quercus ilex
Holly oak
moderate
9
Quercus lobata
Valley oak
moderate
0
Quercus macrocarpa
Burr oak
high
3
Quercus suber
Cork oak
high
3
Salix babylonica
Weeping willow
moderate
1
Schinus molle
California pepper
high
2
Schinus terebinthifolius
Brazillian pepepr
high
1
Sequoia sempervirens
Coast redwood
low
8
Taxus baccata
English yew
low
14
Tilia tomentosa 'Sterling Silver'
Silver linden
low
7
Trachycarpus fortunei
Windmill palm
high
5
Ulmus parvifolia
Chinese evergreen elm
moderate
3
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
1
1
16
Terman Park and School Tree Count
655 Arastradero Rd., Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
moderate
3
Acacia baileyana
Bailey acacia
Acer palmatum
Japanese maple
low
1
Alnus rhombifolia
White alder
low
4
Arbutus unedo
Strawberry tree
moderate
3
Betula pendula
European white birch
low
7
Calocedrus decurrens
Incense cedar
low
2
Cinnamomum camphora
Camphor
moderate
2
Citrus x limon
Lemon
low
1
Crataegus laevigata
English hawthorn
moderate
2
Diospyros kaki
Persimmon
low
1
Eriobotrya japonica
Loquat
moderate
1
Eucalyptus polyanthemos
Silver dollar gum
high
1
Eucalyptus sideroxylon
Red ironbark
high
1
Fraxinus angustifolia 'Raywood'
Raywood ash
moderate
8
Fraxinus uhdei
Evergreen ash
moderate
1
Juniperus chinensis ' Kaizuka'
Hollywood juniper
high
1
Lagerstroemia indica
Crape myrtle
low
2
Ligustrum lucidum
Glossy privet
moderate
3
Liquidambar stryraciflua
Sweet gum
low
16
Magnolia grandiflora
Southern magnolia
low
11
Malus domestica
Apple
low
3
Malus floribunda
Flowering crabapple
low
1
Maytenus boaria
Mayten
high
1
Morus alba
Mulberry
moderate
1
Pinus halepensis
Aleppo pine
high
2
Pinus radiata
Monterey pine
high
1
Prunus armeniaca
Apricot
low
1
Prunus cerasifera 'Autropurpurea'
Purple-leaf plum
moderate
20
Quercus agrifolia
Coast live oak
high
2
Quercus rubra
Red oak
high
3
Schinus molle
California pepper
high
2
Schinus terebinthifolius
Brazilian pepper
high
2
Sequoia sempervirens
Coast redwood
low
20
Ulmus parvifolia
Chinese evergreen elm
moderate
6
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
13
24
Hewlett Packard Tree Count
3000 Hanover St., Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
Acer palmatum
Japanese maple
low
1
Albizzia julibrissin
Silk tree
low
3
Arbutus unedo
Strawberry tree
moderate
6
Callistemon viminalis
Weeping bottlebrush
high
10
Cedrus atlantica
Atlas cedar
moderate
3
Cedrus deodara
Deodar cedar
moderate
1
Cercis canadensis
Eastern redbud
low
1
Cercis occidentalis
Western redbud
moderate
16
Diospyros kaki
Persimmon
low
1
Eryobotrya japonica
Loquat
moderate
3
Eucalyptus polyanthemos
Silver dollar gum
high
2
Eucalyptus sideroxylon
Red ironbark
high
1
Fagus sylvatica ' Autropunicea'
Copper beech
low
1
Fraxinus augustifolia ' Raywood'
Raywood ash
moderate
13
Fraxinus uhdei
Evergreen ash
moderate
1
Geijera parviflora
Australian willow
moderate
5
Ginkgo biloba
Maidenhair tree
moderate
39
Gleditsia triacanthos
Honeylocust
high
12
Lagerstroemia indica
Crape myrtle
low
5
Leptospermum scoparium
New Zealand tea tree
high
39
Ligustrum lucidum
Glossy privet
moderate
6
Liquidambar stryraciflua
Sweet gum
low
87
Liriodendron tulipifera
Tulip tree
low
19
Magnolia grandiflora
Southern magnolia
low
13
Olea europaea
Olive
high
4
Pinus canariensis
Canary Island pine
high
2
Pinus halepensis
Aleppo pine
high
20
Pinus pinea
Italian stone pine
high
5
Pinus radiata
Monterey pine
high
11
Pistacia chinensis
Chinese pistache
moderate
16
Platanus x acerifolia
London plane
moderate
37
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
Hewlett Packard Tree Count
3000 Hanover St., Palo Alto
Scientific Name
Podocarpus macrophyllus
Common Name
Yew pine
Prunus cerasifera ' Autropurpurea' Purple-leaf plum
Salt
Tolerance
# Trees
Not Protected
moderate
3
moderate
11
Pyrus calleryana
Callery pear
high
1
Pyrus kawakamii
Evergreen pear
high
10
Quercus agrifolia
Coast live oak
high
22
Quercus ilex
Holly oak
moderate
2
Quercus lobata
Valley oak
moderate
10
Quercus macrocarpa
Burr oak
high
1
Quercus rubra
Red oak
high
43
Quercus virginiana
Southern live oak
high
44
Robinia pseudoacacia
Black locust
high
1
Schinus terebinthifolius
Brazilian pepper
high
2
Sequoia sempervirens ' Soquel'
Coast redwood
low
208
Sequoiadendron giganteum
Giant sequoia
low
7
parvifolia
Ulmus p
Chinese evergreen
g
elm
moderate
22
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011
# Trees
Protected
7
40
94
Tesla Motors Tree Count
3500 Deer Creek Rd., Palo Alto
Scientific Name
Common Name
Salt
Tolerance
# Trees
Not Protected
# Trees
Protected
Acacia baileyana
Bailey's acacia
moderate
4
Acacia melanoxylon
Blackwood acacia
moderate
5
Arbutus unedo
Strawberry tree
moderate
3
Casurina cunninghamiana
River she-oak
high
59
Cinnamomum camphora
Camphor
moderate
1
Crataegus laevigata
English hawthorn
moderate
6
Eucalyptus camadulensis
River red gum
high
2
Eucalyptus globulus
Blue gum
high
5
Eucalyptus globulus ' Compacta'
Dwarf blue gum
high
6
Eucalyptus leucoxylon
White ironbark
high
24
Eucalyptus viminalis
Manna gum
high
3
Lagerstroemia indica
Crape myrtle
low
6
Lophostemon confertus
Brisbane box
moderate
2
Malus floribunda
Flowering crab apple
low
12
Melaleuca quinquenervia
Cajeput tree
moderate
3
Pinus canariensis
Canary island pine
high
1
Pinus pinea
Italian stone pine
high
5
Pistacia chinensis
Chinese pistache
moderate
23
Platanus x acerfolia
London plane
moderate
7
Prunus cerasifera ' Atropurpurea'
Purple-leaf plum
moderate
20
Prunus serrulata
Flowering cherry
low
4
Quercus agrifolia
Coast live oak
high
200
81
Quercus lobata
Valley oak
moderate
20
26
Querus robur ' Fastigiata'
Fastigate English oak
high
3
Salix
Tipuana tipu
Willow
Tipu tree
low
moderate
1
3
Tree Inventory
Palo Alto Recycled Water Project, Phase 3
October 2011