154 



THE CACTACEAE. 



areoles 2 to 3 cm. apart; spines 9 to 12, the longer 3 to 5 cm. long, ascending; bud globose-ovoid, 

 short-pointed, its scales with sparse curled grayish-white wool, 3 to 6 mm. long. 



TV [>c locality: Sea-beach between Rio Grande and Rio Ubero, Oriente, Cuba. 



Distribution: Known only from the type locality. 



This plant was collected near the type locality of the preceding species ; specimens of 

 the two appeared to be different when first studied, but subsequent observations indicate 

 that they may not be distinct; additional evidence is needed to determine this question. 



Figure 224 is from a photograph of the type plant in its natural environment. 



9. Harrisia aboriginum Small, sp. nov. 



Plants 6 meters high or less, erect or reclining, simple or branched ; ribs 9 to 1 1 , rounded ; areoles 

 1.5 to 3 cm. apart; spines 7 to 9, acicular, mostly i cm. long or less, sometimes longer, gray with 

 brown tips when mature, pink when young; flower-buds densely brown-hairy; flowers slightly 

 odorous, about 15 cm. long; scales of the ovary and flower-tube lanceolate, subtending short brown 

 hairs; outer perianth-segments linear, acuminate, the inner oblanceolate, white, caudate-acuminate, 

 erose-denticulate; fruit globular, yellow, 6 to 7.5 cm. in diameter. 



On shell-mounds, western coast of Florida, north of the Ten Thousand Islands to 

 Tampa Bay. Type collected by John K. Small on Terra Ceia Island, April 1919. 



The type plants were found growing in shell heaps formed by the aborigines, whence 

 the specific name. 



10. Harrisia earlei sp. nov. 



Pendent and prostrate on limestone rocks, 2 to 3 meters long, dark green, the old stems nearly 

 or quite terete, 4 to 6 cm. in diameter and smooth, the younger branches 2 to 3 cm. in diameter, 

 5 to 7-angled, with spine-bearing areoles 2 to 4 cm. apart; spines gray, acicular, 5 to 8 at each areole, 

 the longer 4 to 5 cm. long, ascending; flowers about 2 dm. long, the slender greenish tube about as 

 long as the limb; ovary about i cm. in diameter, tubercled, bearing short subulate leaves, the areoles 

 with short, white hairs; perianth-tube bearing distant, linear, acuminate scales i to 3 cm. long, the 

 areoles with white hairs i to 1.5 cm. long; outer perianth-segments linear, greenish, acuminate, 

 the inner somewhat broader, white, acute or acuminate; fruit yellow, depressed-globose, tubercled 

 when young, nearly smooth when old, 6 to 7 cm. in diameter. 



Limestone rocks, province of Pinar del Rio, Cuba. Type from San Diego de los Banos, 

 August 31, 1910, collected by Britton, Earle, and Gager (No. 6667). 



In habit and vegetative characters intermediate between typical llarrisiac and 

 Eriocerci, 



11. Harrisia tortuosa (Forbes). 



Cereus tortuosus Forbes, Allg. Gartenz. 6: 35. 1838. 



Cereus arendlii Hildmann and Mathsson in Schumann, Monatsschr. Kakteenk. 4: 173. 1894. 



Eriocereus tortuosus Riccobono, Boll. R. Ort. Bot. Palermo 8: 245. 1909. 



Stem at first erect but soon arching, the slender, bright green branches 2 to 4 cm. thick; ribs 

 few, usually 7, low, rounded, sometimes tuberculate, bright green; spines 6 to 10, subulate, the 

 central one longer than the radials; flowers 12 to 15 cm. long; scales of the ovary and flower-tube 

 ovate, about i cm. long, acute, bearing hair in their axils; outer perianth-segments narrow, dull 

 colored; inner perianth-segments broader than the outer, acute, white to pink; stamens scarcely 

 exserted ; stigma-lobes green ; fruit globular, tuberculate, red, 3 to 4 cm. in diameter, its areoles bearing 

 a few short spines. 



Type locality: Buenos Aires, Argentina. 



Distribution: Argentina. 



Riccobono gives as a synonym of this species Cereus atropurpureus (Hocay, Cacteen- 

 cult. 91). Under this name it is also briefly described in the Theodosia B. Shepherd Com- 

 pany's Descriptive Catalogue for 1916. 



Cereus davisii (Monatsschr. Kakteenk. 14: 166. 1904) is an unpublished name; a 

 specimen in the Succulent House at Kew indicates that it is related to H. tortuosa. 



