. Carnegie Institution of Washington publication. OPUNTIA. 195 Illustration: Cact. Mex. Bound, pi. 75, f. 15. Figure 240 is from a drawing of the plant collected by Dr. Rose near El Paso, Texas, in 218. Opuntia trichophora (Engelmann) Britton and Rose, Smiths. Misc. Coll. 50: 535. 1908. Opuntia missouricnsis triflwphora Engelmann, Proc. Amcr. Acad. 3: 30x3. 1856. Opunlia polyacanlha trichophora Coulter, Contr. U. S. Nat. Herb. 3: 437. 1896. A low, spreading plant, often forming small clumps 6 to 10 dm. in diameter; joints orbicular to obovate, 6 to 10 cm. in diameter; areoles closely set; spin
. Carnegie Institution of Washington publication. OPUNTIA. 195 Illustration: Cact. Mex. Bound, pi. 75, f. 15. Figure 240 is from a drawing of the plant collected by Dr. Rose near El Paso, Texas, in 218. Opuntia trichophora (Engelmann) Britton and Rose, Smiths. Misc. Coll. 50: 535. 1908. Opuntia missouricnsis triflwphora Engelmann, Proc. Amcr. Acad. 3: 30x3. 1856. Opunlia polyacanlha trichophora Coulter, Contr. U. S. Nat. Herb. 3: 437. 1896. A low, spreading plant, often forming small clumps 6 to 10 dm. in diameter; joints orbicular to obovate, 6 to 10 cm. in diameter; areoles closely set; spines numerous, very unequal, the longer one 4 cm. long or so, acicular, pale, often white, but on old joints developing into long, weak hair- like bristles ; flowers yellow, the sepals tinged with red ; ovary with numerous areoles, these bear- ing weak, pale bristles; fruit unknown. Type locality: Mountains near Albuquerque, New Mexico. Distribution: New Mexico, Texas, and Oklahoma. This plant, while closely related to Opuntia polya- cantha, seems worthy of specific rank, its long weak spines being apparently characteristic. Its northern extension into Oklahoma has recently been determined from plants collected by G. W. Stevens. Illustrations: Pac. R. Rep. 4: pi. 15, f. i to 4; pi. 23, f. 19, alias Opuntia missouricnsis trichophora. Figure 241 is copied from the first illus- tration above 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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