accent tree is usually incorporated into the border planting and has outstanding characteristics when compared with nearby plants. Patio trees can be evergreen or deciduous and should be selected primarily for small size and for creating interesting trunk, branch and leaf shade patterns on the patio. Evergreen patio trees are useful in areas where warm tem- peratures persist throughout most of the year. In colder areas, decid- uous trees are a better choice since sunlight will warm the patio area during winter months. Patio trees should not have objectionable or large fruits, flowers or seeds that might stain paving material or fall on people using the patio. Seaside trees are those recom- mended for planting in areas sub- ject to salt water spray, high winds and in sandy, high-salt-level soils. Trees for tropical effects, of course, are those associated with tropical areas. When planning a Florida landscape most homeown- ers like to include some trees that will give this effect. Trees recom- mended for this purpose usually have leaves of striking size or shape, flowers of unusual shape, size or vivid color, and trun k shapes and characteristics not found in trees of northern and temperate climates. Climate and Trees Trees for landscape plantings must be well adapted to their en- vironment for vigorous, thrifty growth. Subtropical, less cold- hardy trees planted in areas sub- ject to low temperatures will ulti- mately prove disappointing as will many species from cold regions when planted in subtropical sec- tions. Relatively few trees are adapted to all parts of Florida because of temperature differences between northern and southern sections during winter months. E ven though these low temperature dif- ferences are not great, the range is too critical for many subtropical plants. They may suffer severe damage or death when exposed for several hours to below freezing temperatures. Many trees of temperate regions of the United States and northern Florida are not suitable for central and southern sections of the state. They have a chilling requirement and period of dormancy that can- not be obtained in central and southern areas due to warm win- ters. The primary choice of a tree for a given locality, therefore, should be climatic adaptation. Normal prevailing winter tem- peratures have caused designation of northern, central and southern Florida regions, to which certain trees are climatically adapted. These areas are not separated by distinct or regular lines of demar- cation because of the influence on temperature of elevation, large lakes or proximity to the ocean and the Gulf Stream. Delineation of sections or areas according to a specified seasonal temperature minimum will fluctuate from year to year so that boundaries cannot be sharply defined. The northern area generally in- cludes that part of the state lying north and west of Ocala and is the area receiving heaviest frosts. The southern, warmest area extends from Key West northward along