ADDISONIA Al 
(Plate 61) 
HARRISIA GRACILIS 
Jamaica Harrisia 
Native of Jamaica 
Family CACTACEAE Cactus Family 
Cereus gracilis Mill. Gard. Dict. ed. 8. Cereus no. 8. 8. 
Cereus repandus Haw. Syn. Pl. Suce. 183. 1812. Not Cereus repandus Mill. 
1768 
Cereus subrepandus Haw. Suppl. Pl. Succ. 78. 1819. 
Harrisia gracilis Britton, Bull. Torrey Club 35: 563. 1909. 
A dark green elongate cactus, sometimes twenty feet high, 
usually much branched, the branches rather slender, nearly erect, 
ne half inches in 
or sometimes four or five feet high and two or three times as thick 
as the branches. ‘The areoles, borne on the ribs, are small and 
linear, long-pointed, rather widely spreading, from two inches to 
three inches long and one sixth to one quarter of an inch wide; 
tT, 
and its top somewhat bluntly pointed; it is strongly tubercled 
when young, with low conic tubercles about one sixth of an inch 
high, each bearing a triangular lanceolate scale about a third of an 
inch long; in ripening, these tubercles become confluent and the 
Scales fall away, the mature fruit being smooth or nearly so. 
