(named for Andrew Carnegie, philanthropist) . Cactaceae. The giant tree cactus of Arizona, California and Mexico.

Large columnar plants, usually single, strongly ribbed, with numerous spines, those from flowering and sterile areoles quite different: flowers borne from the upper areoles, diurnal, funnelform; petals white: fruit an oblong edible berry; seeds black and shining.

Gigantea

Brit. & Rose (Cereus giganteus, Engelm.). Suwarro. (Plate III, Fig. 819.) A tree 20-60 ft. high, usually single, but sometimes with one or more branches: ribs in mature plants 18-21: fruit 2-3 in. long. B.M. 7222. A.G. 11:451, 528. - In rocky valleys and on mountainsides, S. Ariz, and Sonora, with 2 stations in Calif. [reported, but probably not to be found, in Lower Calif.]. This great cactus does not do well in cultivation, although large plants are often brought into greenhouses and grounds about railroad stations in the S. W. It is not suited for small collections. The fruit is gathered in great quantities by the Indians of Ariz, J. N.. Rose.

Flower of Carnegiea gigantea. (X 1/4)

Fig. 819. Flower of Carnegiea gigantea. (X 1/4)