Euphorbia Wulfenii

A wonderful plant of May is the great Euphorbia Wulfenii. It adapts itself to many ways of use, for, though the immense yellow-green heads of bloom are at their best in May, they are still of pictorial value in June and July, while the deep-toned, grey-blue foliage is in full beauty throughout the greater part of the year. It is valuable in boldly arranged flower borders, and holds its own among shrubs of moderate size, but I always think its best use would be in the boldest kind of rock-work.