. Carnegie Institution of Washington publication. ACANTHOCEREUS. 125 taken by Marshall A. Howe on Boot Key, Florida, in 1909; figure 183 shows the fruit and withering perianth of a specimen collected by Dr. Rose at Laredo, Texas, in 1906; figure 184 is from a photograph by J. K. Small of a plant in the cactus plantation of Charles Deering, Buena Vista, Miami, Florida, May 1918, originally brought from Sands Key in 1917. 4. Acanthocereus subinermis sp. nov. Plants i meter high or higher; joints stout, ,s to 7 cm. broad, strongly 3 or 4-angled, bright green, somewhat shining, usually short; areo
. Carnegie Institution of Washington publication. ACANTHOCEREUS. 125 taken by Marshall A. Howe on Boot Key, Florida, in 1909; figure 183 shows the fruit and withering perianth of a specimen collected by Dr. Rose at Laredo, Texas, in 1906; figure 184 is from a photograph by J. K. Small of a plant in the cactus plantation of Charles Deering, Buena Vista, Miami, Florida, May 1918, originally brought from Sands Key in 1917. 4. Acanthocereus subinermis sp. nov. Plants i meter high or higher; joints stout, ,s to 7 cm. broad, strongly 3 or 4-angled, bright green, somewhat shining, usually short; areoles 3 to 4 cm. apart; spines either wanting or short, when present 6 to 10 at an areole, acicular, usually less than cm. long; flowers various in size, 15 to 22 cm. long; outer perianth-segments narrow, reddish, acute; inner perianth-segments white; areoles of ovary and flower-tube somewhat spiny; fruit globular to short-oblong, 4 cm. long, dull red. Collected by J. N. Rose between Mitla and Oaxaca City, Mexico, September 6, 1908 (No. 11304). It has since been grown in Washington and in the New York Botanical Garden, where it has frequently flowered and fruited. Plate xvi, figure 2, represents a flowering joint of the type specimen, and figure 3 shows its fruit. 5. Acanthocereus occidentalis sp. nov. Stems rather weak, forming dense thickets; branches slender, 4 to 5 cm. in diameter, 3 to 5-angled, dull green, often bronzed; margins of ribs slightly sinuate; areoles i to 3 cm. apart, filled with short brown wool; spines numerous, nearly equal, yellowish, acicular, up to 7 cm. long; flowers 14 to 18 cm. long; fruit unknown. Common on the western coast of Mexico, where it was frequently collected by Rose, Standley, and Russell at the following places: San Bias, Sinaloa, March 24, 1910 (No. 13431, type); Mazatlan, April 4, 1910 (No. 14050); Guadalupe, April 18, 1910 (No. 14752); and by Dr. Rose at Rosario in 1897 (No. 3170)- This species is widely separated geographically from
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