54 EUCALYPTS CULTIVATED IN THE UNITED STATES. 
horizontally placed, dark green and glossy above, and feather-veined, 
their appearance giving the tree its specific name calophylla, the Greek 
for ‘‘ beautiful leaves.” The flowers are unusually large for the genus, 
commonly cream-colored, in large clusters. The urn-shaped seed cases 
are the largest of any EKucalypt, bemeg rivaled only by those of 4. jfic7- 
Folia, to which it is closely related, the most conspicuous difference 
-being in the bright red flowers of the latter. As the seed cases per- 
sist for some time, they are a conspicuous feature of the tree. The 
seeds are large and the seed leaves of the young plants consequently 
unusually prominent. The young seedlings are hairy for some time, 
the leaves differing in a striking manner from the glossy ones of the 
adult tree. (See Pl. LIL.) 
Climatic requirements.—Hucalyptus calophylla thrives best in a 
moist, tropical climate, enduring neither a hot, dry atmosphere, nor 
low temperatures. In America it has succeeded only in the warm 
coast regions, failing entirely in the dry interior plains and valleys. 
In no locality has the rate of its growth been such as to give promise 
of much usefulness as a forest tree. 
Uses.—The species furnishes a valuable timber, said to be used in 
Australia much as hickory is in the United States, but the wood is 
reported as notdurable underground. It yieldsa large amount of kino, 
and in Australia the bark is used in tanning. On account of its pro- — 
fuse bloom the tree is an important source of nectar for bees. In Cal- 
ifornia the large seed cases have been polished and used for pipe bowls. 
Eucalyptus citriodora. 
LEMON-SCENTED GUM. 
Characteristics. —This is a handsome, fast-growing tree, soon becom- 
ing talland slender. In favorable situations in the Southwest it attains 
a height of 60 to 100 feet in ten to fifteen years. The trunk is straight 
and even, the foliage being confined mostly to the lofty summit. (PL 
XIV.) Consequently it is necessary to cut it back severely if its 
leaves and flowers are to be accessible. The bark is light-colored, 
faintly mottled by indentations that indicate where thin patches have 
flaked off. This mottling of the trunk, together with the stately 
character of the tree, the graceful foliage, the profuse bloom, and the 
fragrant leaves, make this Eucalypt one of the most attractive of the 
genus.) (BL Ov) 
The stems and leafstalks of the young seedlings are rough, with short, 
brownish hairs, and their leaves oval or lance-shaped, with the leafstalk 
attached above the roundish base. (See Pl. LXXXI, pv.) The leaves 
of the tree are long, quite narrow, and equally shiny green on the two 
sides. The foliage possesses a pleasant odor closely resembling that ofa 
lemon, giving the tree its varietal name c7trdodora, the Latin for ** citrus- 
