78 



THE CACTACEAE. 



Azua, Santo Domingo, and a little later received living specimens from Father M. Fuertes, 

 of Barahona, Santo Domingo. Dr. Rose's material showed for the first time the peculiar 

 root system of this species. With it also were old flowers and fruit, heretofore unknown. 

 The species is rare about Azua, only two stations being found in the lower foothills north 

 of the town (No. 3941). Dr. Paul Bartsch collected specimens in Haiti in 1917 (No. 221). 



Illustration: Monatsschr. Kakteenk. 14: 155, as Cereus weingartianus . 



Figure 112 shows part of a branch of a plant collected by Dr. Rose at Azua, Santo 

 Domingo, in 1913. 



2. Leptocereus leonii Britton and Rose, Torreya 12: 15. 1912. 



Cereus leonii Vaupel, Monatsschr. Kakteenk. 22: 66. 1912. 



Plant up to 5 meters high, repeatedly branching, the rounded trunk 3 cm. in diameter at the 

 base, the cortex scaly-roughened; ultimate branches about 1.5 cm. in diameter, slender, elongated, 

 6 to 8-ribbed; old areoles 1 to 1.5 cm. apart in vertical rows, bearing acicular spines; ribs crenate, 

 with the areoles borne at the depressions; spines 6 to 12 at an areole, long, yellowish when young, 

 gray when old, 2 to 9 cm. long; flower 3.5 cm. long, campanulate; inner perianth-segments pink, 

 about 15, withering-persistent; tube of flower bearing scattered areoles each with 1 to 4 short spines 

 or some of them spineless ; fruit globose-ovoid, 2 cm. in diameter, with a few scattered spine-bearing 

 areoles ; seeds black. 



Type locality: Sierra de Anafe, near Guayabal, Cuba. 



Kig. 113. — Leptocereus leonii. 



