Fig. 41.-Foliage and fruit of the queensland nut, Macadamia terni-
 folia.

Fungus diseases may cause leaf spotting, but neither these nor insects
limit use of this tree.

 Macadamia ternifolia. Proteaceae. Queensland Nut. Southern
area and warmer parts of Central area. Evergreen. Australia.
 In Florida, queensland nut is usually low branching with more
than one trunk, and a dense foliaged, round-headed crown up to 35
feet. The dark green, glabrous, stiff brittle leaves, in whorls of 3 or 4,
are oblong or lanceolate, from a few inches to a foot long with un-
dulate margins ranging from smooth to serrate (Fig. 41). Small
cream-colored flowers are borne in racemes about as long as the
leaves. Edible seeds or nuts are globular, about an inch in diameter
and hard-shelled. Queensland nut is relatively slow growing and does
not fruit until about 7 years old.
 This tree is generally used as a lawn specimen, patio tree, in
border plantings for cream-colored flower effect and in hedge plant-
ings. Insects and disease pests are not known to be a problem to this
tree in Florida.

 Magnolia grandiflora. Magnoliaceae. Southern Magnolia or Bull
Bay. Central and Northern areas. Evergreen. Native.
 This tree is pyramidal or upright-spreading and often grows to
a height of 100 feet with a spread of 50 feet. Stiff, leathery leaves
are simple, oval-oblong, 5 to 8 inches long, deep shining green above
and green to rusty brown beneath. New foliage appears in early
spring, coincidental with shedding of the old. In April, May and June
there is a succession of creamy white, strongly scented flowers up
to 8 inches in diameter (Fig. 42). Scarlet seeds are borne in 4-inch
cone-like receptacles and mature in late summer to early fall. Southern