This section is from the book "The American Garden Vol. XI", by L. H. Bailey. Also available from Amazon: American Horticultural Society A to Z Encyclopedia of Garden Plants.
A Pasadena correspondent of a California contemporary extols the Australia black wattle as a street tree. This tree probably possesses merit for all the warmer portions of the union. The tree is probably Acacia decurrens, although A. binervata is sometimes known by the same name. The correspondent writes as follows :
"As the varieties of trees available for planting in our climate are not numerous, I beg to call the attention of the parties interested to the Australian black wattle, of which tree specimens are growing on my house lot.
"These trees were planted four years ago, having been obtained from the State University. They were then small spotted plants about six inches high. They are now twenty to thirty feet high, showing a growth without any care at all, second only to that of the eucalyptus. They are evergreen acacias having dark feathery foliage and forming a fine spreading head when trimmed up from the root while growing. The standards, south of ray house, show what they will do when allowed to grow naturally. Those west of Dr. McCoy's house are too close together (three feet) to show good heads. But as the row in which they stand is from east to west, and they were exposed to the full blast of last winter's norther without falling over or breaking a limb, they have proved themselves superior in this respect as a street tree, to the omnipresent pepper tree, which frequently goes over in a wet storm.
"But the crowning glory of this tree is its flowers. From the lowest branch to the topmost twig it is bursting out in one mass of glory - the flowers appearing in feathery clusters of a greenish white color, in charming contrast with the dark green of the leaves. The perfume is that of bitter almonds.
"How large the tree will grow I do not know, probably no larger than the locust or pepper. But an avenue of them planted twenty-five or thirty feet apart, and trimmed well up while growing, so as to keep the naturally drooping lower limbs out of the way of travel, would cause a deep shade and could hardly fail to add to the appearance of the neighborhood, besides breaking the monotony of the ever-present pepper tree".
 
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