8o 



THE CACTACEAE. 



5. Leptocereus maxonii sp. nov. 



Stems i to 1.5 meters high, more or less branched, erect or sometimes with recurved branches; 

 ribs 5 or 7, usually 6, thin, 6 to 15 mm. deep, scalloped; areoles 1.5 to 2 cm. apart, circular; spines 

 when young of a decided yellowish-brown color, dark brown or sometimes whitish in age, about 20 

 from an areole, needle-shaped, the longer ones 3 cm. long; flowers 5 to 6 cm. long; inner perianth- 

 segments about 32, spreading at right angles to the tube, linear-oblong, yellowish green inside, the 

 outer obtuse, the inner acute ; stamens cream-colored ; ovary and flower-tube densely covered with 

 yellowish spines ; immature fruit bur-like, 4 cm. long, densely covered with yellow or brownish spines. 



Fig. 115. — Leptocereus maxonii. 



Collected by Wm. R. Maxon at Berraco, 8 miles east of Daiquiri, Cuba, April 13, 1907 

 (No. 4023), and by Britton and Cowell at the same locality, March 1912 (No. 12657, type). 



This species differs from L. assurgens in habit, in having more ribs, and in the flowers 

 and young shoots being covered with yellow spines and bristles instead of dark brown ones. 



Figure 115 is from a photograph of a branch of the plant collected by Mr. Maxon as 

 above cited. 



6. Leptocereus arbor eus Britton and 

 Rose, Torreya 12: 15. 191 2. 



Cereus arboreus Vaupel, Monatsschr. 

 Kakteenk. 22: 65. 191 2. 



Plants up to 6 meters high, erect, 

 much branched; joints 3 to 10 dm. long, 5 

 to 6 cm. in diameter, narrowed at base; 

 ribs 4, narrow, thin, 1.5 to 2 cm. deep, 

 somewhat depressed between the areoles ; 

 areoles 2.5 to 4 cm. apart or less; spines 

 10 or fewer, acicular, yellowish, becoming 

 gray, radiating, the longer up to 5 cm. 

 long; flower short, campanulate, 2 to 3 

 cm. long; inner perianth-segments short, 

 spreading, greenish white to cream-colored ; 

 ovary and flower-tube very spiny; fruit 

 ellipsoid, 8 to 10 cm. long, 5 to 6 cm. in 

 diameter, its areoles bearing tufts of nu- 

 merous light-yellow spines. 



Type locality: Punta Sabanilla, Santa Clara, Cuba. 



Distribution: Near southern coast of the Province of Santa Clara, Cuba. 



Plate xin, figure 1 , shows the plant collected by Britton, Cowell, and Earle at Cas- 

 tillo de Jagua, Cuba, in 191 1, which flowered in the New York Botanical Garden in 1913. 

 Figure 116 shows a fruit of the type specimen. 



