15° 



THE CACTACEAE. 



with a tuft of long white hairs in each axil; outer perianth-segments very narrowly linear, slenderly 

 acuminate; inner perianth-segments white or pinkish, spatulate, caudate-tipped; fruit obovoid or 

 globose, about 6 cm. in diameter, dull red, -with tufts of long hairs persistent with the scale-bases. 



Coastal sand-dunes, Brevard and St. Lucie Counties, Florida. Type collected by John 

 K. Small on sand-dunes 6 miles south of Fort Pierce, December 191 7. 



Plants, taken to the cactus plantation of Air. Charles Deering at Miami, Florida, in 

 1917, flowered and fruited in April 1918. 



Plate xix, figure 1, shows a flowering top of a plant from an island east of Malabar, 

 Florida, brought to the New York Botanical Garden by Dr. Small in 1903; figure 2 shows 

 its fruit. Figure 216 is from a photograph of the plant in the cactus garden of Mr. Charles 

 Deering, Miami, Florida, taken by Dr. Small. 



3. Harrisia portoricensis Britton, Bull. Torr. Club 35: 563. 1908. 



Cereus portoricensis Urban, Symb. Ant. 4: 430. 1910. 



Plant slender, 2 to 3 meters high, little branched, the branches nearly erect, 3 to 4 cm. thick, 

 1 1 -ribbed, the ribs rounded, the depressions between them shallow; areoles 1.5 to 2 cm. apart; spines 

 13 to 17, grayish white to brown with dark tips, the longer ones 2.5 to 3 cm. long; bud obovoid, de- 

 pressed-truncate, its areoles with many curled white hairs 6 mm. long or less; flower about 1.5 dm. 

 long; outer perianth-segments pinkish green inside, the inner white ; scales of the flower-tube lanceo- 

 late, appressed, 1.5 cm. long, the areoles loosely hairy, the hair completely deciduous in flakes; fruit 

 ovoid to globose, yellow, tubercled, becoming smooth or nearly so, 4 to 6 cm. in diameter. 









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Fig. 217. — Harrisia portoricensis. 



Type locality: Near Ponce, Porto Rico. 



Distribution: Type locality and vicinity, and on the islands Mona and Desecheo. 



Plate xvii, figure 3, shows a fruiting branch of the plant from the type locality, painted 

 at the New York Botanical Garden in 1914. Figure 217 is from a photograph taken at 

 the type locality by Delia W. Marble in 191 3. 



