What is known at the West as wild olive or oleaster {Elœagnus angustifolia) is hardy from the lakes west to Colorado and northwest to Manitoba. This species or variety differs materially from the E. hortensis of Eastern nurseries, which is not hardy at the West. In the prairie States the E. angustifolia makes a round-topped tree twenty-five feet in height and its dense crop of silvery-colored leaves make a good shade. But the hortensis is much smaller in growth, with less dense habit and less fragrant flowers. The angustifolia can be used to advantage in grouping and also in places as a single specimen. Its roots develop nitrogen in the soil, like the legumes, and grass will grow under ils shade quite as well as in open exposure, and all crops will grow well close to it.

The buffalo-berry (E. argentea) has been mentioned in the list of native wild fruits (274. The Buffalo-berry). It is also valuable in small groups on lawns and in parks. It is a large bush or small tree with silvery foliage, contrasting finely with its dark-red fruit in late summer and autumn. This is dioecious (34. Monoecious and Dioecious Flowers). Hence it must be in groups to give crops of fruit.