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 1.5 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 the 

 others of this genus, being confined to low thickets along the 

 coast of Sinaloa, western Mexico. 



Figure 185 shows part of a joint of a plant brought by Dr. 

 Rose from Sinaloa in 1910. 



FIG. 185. Joint of Acanthoce- 

 reus occidentalis. Xo.5. 



6. Acanthocereus brasiliensis sp. nov. 



Stems weak, at first erect but soon prostrate or clambering over bushes, usually much branched 

 at base, bright green, somewhat shining; ribs 5 to 7, high and thin, slightly undulate; areoles small, 

 2 to 4 cm. apart; spines numerous, acicular, white with brown tips, 3 cm. long or less; flowers about 

 15 cm. long; buds acuminate; outer perianth-segments linear; ovary bearing clusters of acicular 

 spines; fruit globular, slightly tuberculate, 8 cm. in diameter, green, covered with clusters of acicular 

 deciduous spines; pulp greenish white; seeds few, large, brownish. 



Common in thickets in the subarid parts of Bahia, Brazil, where it was frequently 

 observed by Dr. Rose in 1915; the type is from Machado Portella (No. 19903). 



This species not only is out of the range of the preceding species of this genus, but is 

 otherwise somewhat anomalous, for it normally has more ribs and these of different texture. 

 The fruit, too, is much larger than that of the other species, is covered with deciduous 

 spines, and has a greenish white pulp. 



Figure 186 is from a photograph taken by Paul G. Russell at the type locality in 1915. 



7. Acanthocereus (?) albicaulis sp. nov. 



A low, weak plant, although erect at first, a meter high or less, afterward elongating and arch- 

 ing; branches few, usually sharply 4-angled, i to 3 cm. broad, bluish white, the margins only slightly 



