1250 Lincoln Avenue, street tree on the left
The second-most numerous street tree in Palo Alto, London Plane Trees are in the sycamore family. They are very tolerant of urban pollution, shedding toxins in their peeling bark. A disease called anthracnose is common in older varieties of London Plane Trees, but those planted today are bred to be resistant.
1250 Lincoln Avenue, street tree on the right
The tallest deciduous tree in the world, the Tulip Tree has inconspicuous tulip-like flowers and bright gold fall color. Its wide-spreading roots need summer water. It is very prone to aphid infestation; the resulting sticky, sugary coating on and around the tree in turn provides food for a sooty mold fungus.
1195 Hamilton Avenue, 2 street trees
Southern Magnolias are the most numerous street trees in Palo Alto. Many Southern Magnolias were planted in Palo Alto in the early 1900s by the Woman's Club of Palo Alto, which traveled through the town with a horse and cart to water them. They have large, fragrant, creamy white flowers, 8–10" wide, that bloom throughout the summer and fall. Today, many of these trees are showing their age with lots of dead wood and are reaching the end of their expected lifespan. Planting more Southern Magnolias is discouraged because of their need for copious water.
1189 Hamilton Avenue, 3 street trees
This prehistoric species—the oldest cultivated tree on earth—provides intense yellow fall color. It comes in two genders, which cannot be distinguished until the sapling is 5–6 years old. The fruit of the adult female emits a terrible stench in the fall, so it is best to buy male trees.
1181 Hamilton Avenue, 2 trees in the front yard
Native to eastern Africa, but well-adapted to California. This slow-growing evergreen shade tree is a good pest-free tree for street, lawn, patio or garden areas. Although it is nicknamed Fern Pine, it is neither a fern nor a pine. It is also known as Afrocarpus elongatus.
1133 Hamilton Avenue, front yard
Douglas Fir is the principal lumber tree in the U.S. It is native to our local Santa Cruz Mountains as well as much of western North America. It is easily recognized by its cones. They hang from the tree pointing down and each scale of the cone is accompanied by a papery three-pointed bract that extends beyond the point of the scale. The needles, 1–1½" long, stick out from all sides of the branch.
1129 Hamilton, front yard
A fast-growing, but sometimes short-lived, tree. Birches do not store water internally, so they are very sensitive to changes in water level. In this area, lawn water is their typical source of summer water. When stressed by lack of water or when infected by borers (a kind of insect), they die from the top.
1125 Hamilton Avenue, center of the front yard
This large tree can reach 80' with a branch spread of 40'. It is native to the Himalayas and is the national tree of Pakistan. The female flowers become barrel-shaped cones that sit on the top of the branches. The cones take a year to mature and then disintegrate while still on the branches, leaving a central spike on the branch. It is deeply-rooted and drought-tolerant.
1121 Hamilton Avenue, front yard on the right
The Olive is native to the Mediterranean and it likes dry soils. This is the fruiting form of the tree, but the fruit is edible only after long soaking in brine. To prevent fruiting and the consequent staining of pavement, it is best to plant a non-fruiting variety.
1117 Hamilton Avenue, right front corner
Often erroneously called a Tulip Tree, this deciduous magnolia is typically planted as a lawn ornament because of its showy white to pink to purplish-red flowers. In the spring, large saucer-shaped flowers appear like tulips before the leaves appear.
1031 Hamilton Avenue, street tree on Chaucer Street at the corner
This tree is at its most spectacular in May, when 8" long plumes of dark pink flowers appear all over the tree. The leaves are composed of 5 dark green leaflets arranged in a fan. It has large, glossy brown nuts in the fall. The appeal of this tree is purely ornamental; the wood is soft and weak and does not burn well.
975 Hamilton Avenue, between the house and the garage on Hale Street
Native to the Sierra Nevada, these big trees can grow to 300' and live 3,000 years. Ultimately, their trunk girth is very large, but they grow very slowly. They drop less litter and need less water than their close relative, the Coast Redwood.
975 Hamilton Avenue, on Hale Street side, mid-house
Most purple-leaved trees in this area are ornamental plum trees such as this Purple-leaf Plum. Plum varieties that do not produce plums are attractive, low-maintenance, small or medium-sized street trees or yard trees. In spring they have pink flowers before the leaves emerge.
975 Hamilton Avenue, in yard near the corner
The striking foliage of this handsome tree is purple with irregular pink borders. This prominent location, in a large open space of lawn, is ideal for this tree because of its size and its need for moist soil.
645 Hale Street, left and right front corners of the house
This palm is the only palm in California with leaves shaped like feather dusters. Its leaflets emerge from a central axis in all directions. Clusters of thousands of flowers hang from the tree and develop into orange, edible fruits. Like all palms, they are drought-tolerant.
645 Hale Street, right front corner of yard
Native to Australia and New Zealand, this large shrub or small tree is called tea tree because Captain Cook brewed a tea from its leaves and gave it to his crew as a scurvy preventative. It grows 10–30' with finely textured foliage and blooms in spring.
665 Hale Avenue, front yard
This drought-tolerant evergreen can live for up to 200 years and reach up to 70'. Avoid running heavy equipment over the root zone and watering around the tree during dry summer months. Sprinkler water that hits the trunk is especially damaging.
1012 Forest Avenue, 2 street trees
This deciduous tree has toothed, heart-shaped leaves. It has fragrant flowers in July that emerge from a papery, pale green leaf-like bract. It is called a lime tree in England, though it is unrelated to the true lime. Needs moist soil.
1032 Forest Avenue, right side of the front yard
Known from fossils in California and elsewhere and thought to be extinct, this tree was rediscovered in China in 1941. Through cultivation of the seeds, it quickly spread throughout the world. Its leaves are very similar to our familiar Coast Redwood, but they are deciduous. They turn brown in the autumn and fall off, re-emerging in the spring.
1044 Forest Avenue, left of the driveway
This attractive deciduous tree with good red fall color is native to China. The flowers are 4" catkins that cover the tree in summer. This tree produces many seeds, which can germinate and sprout readily making this tree invasive, especially along creeks. It is widely grown in the tropics where the seeds yield vegetable tallow used for soap, oil, and candles.
1056 Forest Avenue, tree left of the driveway
Native to central California, the nut is smooth and hard and embedded in a thick green husk that will stain the fingers. Only a few native stands of this tree remain. It is grown for use as an ornamental tree and for its wood, which has a beautiful grain and good woodworking properties. The primary commercial use of this tree is as rootstock for English Walnut (the edible walnut) orchards all over the world.
1130 Forest Avenue, center of the front yard
Valley Oaks and Coast Live Oaks were the predominant native trees in Palo Alto prior to development. The landscape under this lovely oak requires minimal summer water and creates a habitat similar to its original environment.
1170 Forest Avenue, street tree in front of the driveway
The Silver Maple is a relatively fast-growing deciduous tree that is one of the most common trees in its native area in eastern North America and Texas. The undersides of its large leaves are silvery. Small flowers appear before the leaves unfold in the spring. This tree requires summer water and can cause damage to sidewalks.
1180 Forest Avenue, 2 trees in the front yard
These red Japanese Maples are most likely the variety 'Bloodgood'. In the fall, after a sufficient number of frosty nights, they turn an eye-catching bright red that is almost fluorescent. Arborists recommend planting them in well-drained soil.
1121 Lincoln Avenue, 2 street trees
A small deciduous tree with outstanding fall color. It has small dark blue fruits, about ½" long, which were eaten by Native Americans in its native eastern U.S. Careful selection of a location for this attractive ornamental tree is important; it prefers moist, well-drained soil containing lots of organic matter, and it does not transplant well.
1121 Lincoln Avenue, right side of the front yard
Native to the eastern U.S., where it grows near rivers. The bark of this birch is much darker and thicker than the White Birches seen earlier on this walk. It is a good moderate-sized deciduous tree for moist locations.
A permit is needed to remove or prune these trees.
Check the City of Palo Alto Tree Regulations.
These trees are best adapted to our climate and water availability.
These trees require frequent summer irrigation and will suffer from the drought cycle in our area.
Do not plant unless you are aware of a water source such as high water table or creek proximity.
These trees are either invasive, do not perform well or create infrastructure or other problems.