White ash
Family Oleaceae  (olive)
Fraxinus americana

Leaves are opposite, pinnately compound with 7 serrate to entire leaflets that are ovate to somewhat lanceolate, 8 to 12 inches long and, essentially hairless. The flowers are dioecious (male and female borne on separate plants), both sexes lacking petals. Flowers appear before or with the leaves. The fruit is a  one-winged, dry, flattened samara with a full, rounded, seed cavity, maturing October to November and dispersing over winter. Twigs are stout, gray-olive-green in color, and hairless. Leaf scars round at the bottom, notched at the top, with lateral buds in the notch. Terminal bud is large, brown, and flanked by two lateral buds. Bark is ashy gray to brown in color, with interlacing corky ridges forming obvious diamonds. Older trees may be scaly.

Olive
Family Oleaceae (olive)
Olea europea

Olive tree is adapted to hot, dry summers and introduced into California by the Spaniards  as a food source and oil.  Olive leaves are whitish beneath and dark green above, with a narrow lance-shaped leaves with clusters of tiny, white flowers.

Blue Gum Eucalyptus
Family Myrtaceae (myrtle)
Eucalyptus globulus

Eucalyptus species are evergreens native to Australia. Approximately 200 species of the over 600 in existence have been imported to other temperate climates of the world. The largest variety of species in the United States is in California.

Acacia
Family Fabaceae (pea)
Acacia spp.

Shrubby tree with narrow bipinnate leaves.  Brilliant yellow flowers during late winter.  Trees are common to the African savanna.  Drought resistant.

Mimosa
Family Fabaceae (pea)
Albizia lophantha.

A semievergreen 6 meter tree with leaves that are deep green.  The leaves are twice pinnately divided.   Native to Asia.

Mousehole Tree

Family Myoporaceae

Myoporum laetum

 A shrub to small evergreen tree that is native to New Zealand.  Leaves alternate, lanceolate, 4-14 cm long, glossy green, finely serrated.  Flowers auxiliary, white with purple lines radiating from center.  Fruits oblong, reddish.