. Carnegie Institution of Washington publication. 186 THE FIG. 227—Opuntia megacantha on Lanai, Hawaiian Islands. Type locality: In Mexico. Distribution: Much cultivated in Mexico; grown also in Jamaica and southern Cali- fornia and escaped from cultivation in Hawaii. This species was originally described by Salm-Dyck essentially as follows: Erect and of the size of O. decmnana; joints cm. long by cm. broad and cm. or more thick; areoles close together, filled with gray wool; glochids brownish, becoming blackish; spines 7 to 10, white, unequal, acicular, somewhat radia
. Carnegie Institution of Washington publication. 186 THE FIG. 227—Opuntia megacantha on Lanai, Hawaiian Islands. Type locality: In Mexico. Distribution: Much cultivated in Mexico; grown also in Jamaica and southern Cali- fornia and escaped from cultivation in Hawaii. This species was originally described by Salm-Dyck essentially as follows: Erect and of the size of O. decmnana; joints cm. long by cm. broad and cm. or more thick; areoles close together, filled with gray wool; glochids brownish, becoming blackish; spines 7 to 10, white, unequal, acicular, somewhat radiating, the longest one deflexed, 5 cm. long; flowers not known; leaves small, reddish. Opnntia megacantha trichacantha Salm-Dyck was given as a synonym of this species by Forster (Handb. Cact. 486. 1846), but was never pub- lished. Opuntia tribuloides Griffiths (Monatsschr. Kakteenk. 23: 137. 1913), according to the de- scription, is of this relationship. This is the chief Mission cactus. It is the one from which the best varieties of edible tunas are obtained and is one of the commonest culti- vated opuntias in Mexico, having numerous forms, many of them bearing local names. Illustrations: Ariz. Agr. Exp. Sta. Bull. 67: pi. 8, f. 2; Rep. Mo. Bot. Gard. 19: pi. 24, both as Opuntia castillae. Rep. Mo. Bot. Gard. 22: pi. 4, 5, these two as Opuntia incarnadilla; Amer. Journ. Bot. 4: 572. f. 6. Plate xxxn, figure 4, represents a flowering joint of a plant in the same collection received from Fairmount Park, Philadelphia, in 1905. Figure 226 is from a photograph of a plant in the collection of the New York Botanical Garden; p,G megacantha. X<M-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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