Bucida buceras. Combretaceae. Black Olive or Lucaro. Southern
 and warmer parts of Central area. Evergreen. Native.
 Black olive is native to the Florida Keys and may have a single
trunk or several heavy stems reaching 40 to 50 feet in height (Fig.
10). Heavy spreading branches form a broadly rounded head.
Leathery, simple, bluish-green leaves are crowded in whorls at the
ends of short branchlets. Leaf shape varies from spatulate to obovate
on branchlets that often terminate in a short spine. Greenish-yellow
flowers, about 1/8-inch long, appear in narrow spikes near ends of
branches during late spring.
 Recently black olive has gained favor because of its high salt
tolerance and resistance to wind damage. It is recommended primarily
as a shade or framing tree, but also for seaside plantings, street
and windbreak use. Black olive will grow in calcareous soils and is
relatively free of insect and disease pests.

 Bursera simaruba. Burseraceae. Gumbo-Limbo. Southern area.
Deciduous. Native.
 Gumbo-limbo normally grows to 60 feet and is best distinguished
by its smooth, flaking, red-brown to green bark and its large, crooked,
horizontal branches arising from short thick trunks (Fig. 11). Alter-
nate leaves are pinnately compound with 3 to 7 opposite leaflets 1 to 3
inches long. Inconspicuous, greenish flowers appear in winter and
spring on 2- to 5-inch spikes prior to or with first leaves.
 Gumbo-limbo is planted primarily for the curiosity of its distinc-
tive bark, its salt tolerance and its ability to root and grow from
branches stuck into the ground. Limbs up to 4 inches in diameter
will root rapidly if placed where trees are desired. This tree serves
best when utilized as a background or specimen tree and in street
plantings. Various insect larva may chew foliage but no serious
insect or disease organisms are reported.

 Callistemon citrinus. Myrtaceae. Bottle-Brush or Citrus-Leaved
Bottle-Brush. Southern and Central areas. Evergreen. Australia.
 Confusion exists concerning classification of bottle-brushes since
there are many similar species and hybrids. Callistemon citrinus is
tree-like, growing to 20 feet, with a narrow crown and slender
branches and twigs. Leaves are lanceolate, up to 3 inches long and
smell like citrus if crushed. Red flower spikes, up to 5 inches long
and made up of many red stamens, appear in springtime and look
similar to bristles on a bottle brush (Fig. 12). Ovoid capsules con-
taining seeds surround twigs afer flowering and may remain attached
for years.
 Another bottle-brush familiar to homeowners is Callistemon vi-
minalis weeping bottle-brush. This variety is distinguished by the
weeping habit of branches and foliage.
 Bottle-brush is excellent as a patio subject, free-standing speci-
men or for accent in a green shrubbery border. Insects or diseases
are not reported to be a problem and this tree is moderately salt
tolerant.