Leu has numerous horticultural accomplishments to his credit, but the best known is the Leu Giro Orange, perfected in 1887 by crossing the Mediterranean sweet and Hart's Lane varieties and for which he received the Wilder medal. The tree of this variety will thrive in a climate too cold for others, while the fruit will remain on the tree several years and maintain its maximum amount of juice and flavor.

In 1890 Leu investigated the grapefruit and produced a cross of the common Florida grapefruit and the trifoliate orange. The fruit is of superior quality and the tree can stand from 10 to 15 degrees lower temperature than ordinary varieties. Leu's last citrus development resulted in the perfumed grapefruit, which will permeate a house with an agreeable odor. It is a cross of the pomegranate and grapefruit.

Perfected Cherry Currant.

Leu also perfected the cherry currant in Massachusetts, a cross of the ordinary currant and the grape. In other fields, he produced an apple that ripened in July, a late peach grown under glass with the fruit ripening in November, a salmon-colored raspberry and a tomato plant that grows to a height of 15 feet.

Leu born on farm in Canton, China, in 1859, arrived in San Francisco in March, 1872, and went to New England, where he was employed by Solomon Burlingame of North Adams, Mass. He was adopted by an unmarried daughter of Mr. Burlingame in 1874. 