HARRISIA. 151 



4. Harrisia nashii Britton, Bull. Torr. Club 35: 564. 1908. 



tCereus divergens Pfeiffer, Bnum. Cact. 95. 1837. 

 Cereus nashii Vaupcl, Monatsschr. Kakteenk. 23: 27. 1913. 



Slender, erect, 2 to 3 meters high; branches widely divergent, light green, 3 to 4 cm. thick, 

 9 to 1 1 -ribbed, the ribs rounded; areoles 2 to 2.5 cm. apart; spines only 3 to 6, gray, the longer ones 

 15 mm. long; bud narrowly obovoid, obtuse, very short-pointed, its scales subtending many curled 

 white hairs 6 mm. long or less; flower 1.6 to 2 dm. long; scales of the flower-tube linear, acuminate, 

 1.5 cm. long, subtending a few hairs; fruit ellipsoid, 6 to 8 cm. long, 4 to 5 cm. thick, very strongly 

 tubercled, at least when immature, the conic tubercles 6 to 8 mm. high. 



Type locality: Between Gonaives and Plaisance, Haiti. 



Distribution: Arid parts of Hispaniola. 



Cereus divergens Pfeiffer is known only from the description of a sterile plant. 



Cereus divaricatus De Candolle (Prodr. 3:466. 1828; Cactus divaricatus Lamarck, 

 Encycl. 1:540. 1783; Pilocereus divaricatus Lemaire, Rev. Hort. 1862: 427. 1862) is based 

 upon Plumier's plate 193, which can not be certainly associated with any known cactus. 



Figure 218 is from a photograph by Paul G. Russellnear Azua, Santo Domingo, in 1913. 



Here perhaps is to be referred Cactus fimbriatus Lamarck (Encycl. 1:539. 1783; 

 Cereus fimbriatus De Candolle, Prodr. 3:464. 1828; Pilocereus fimbriatus Lemaire, Rev. 

 Hort. 1862 : 427. 1862) and Cereus serruliflorus Haworth (Phil. Mag. 7: 113. 1830), both of 

 which were based on Burmann's plate of Plumier (pi. 195, f. 1, A, B, C, and D), found along 

 the coast of Haiti under the name of la bande du sud. Cactus fimbriatus Descourtilz (Fl. 

 Med. Antill. ed. 2. 6: 160. pi. 419), which refers to the same plate of Plumier, is really 

 based upon pi. 195, f. 2, of Burmann, and is probably a Lemaireocereus. 



5. Harrisia brookii Britton, Bull. Torr. Club 35: 564. 1908. 



Cereus brookii Vaupel, Monatsschr. Kakteenk. 23: 24. ig'3- 

 Plant 5 meters high, much branched, light green ; branches 

 3 to 4 cm. thick, 10-ribbed, the ribs sometimes prominent, with 

 deep depressions between them; areoles about 2 cm. apart; 

 spines 9 to 12, the longer ones 2 to 2.5 cm. long; young upper 

 spines of areoles brown, others white; bud ovoid, prominently 

 long-pointed, its scales with few curled white hairs 7 to 10 mm. 

 long; fruit yellowish, ellipsoid or subglobose, about 8 cm. in 

 diameter, rounded at both ends, the tubercles very low, with tips 

 only 1.5 mm. high, the linear scales persistent. 



Type locality: Clarence Town, Long Island, Bahamas. 



Distribution: Lone Island, Bahamas. _ _,.,„.., 



° . ' Fig. 2 19. — Fruit of Harrisia brookii. Xo.o. 



Figure 219 shows a fruit of the type plant; figure 220 fig. 220.— Fiower-bud of same. xo.6. 

 shows a fiower-bud of the same. 



6. Harrisia gracilis (Miller) Britton, Bull. Torr. Club 35: 563. 190S. 



Cereus gracilis Miller, Gard. Diet. ed. 8, No. 8. 1768. 



Cactus gracilis Weston, Bot. Univers. 1: 33. 1770. 



Cereus repandus Haworth, Syn. PI. Succ. 183. 1812. Not Cactus repandus Linnaeus, 1753. 



Cereus subrepandus Haworth, Suppl. PI. Suec. 78. 1819. 



Cereus undatus Pfeiffer, Enum. Cact. 94. 1837. Not Haworth, 1830. 



Harrisia undata Britton, Bull. Torr. Club 35: 564. 1908. 



Eriocereus subrepandus Riccobono, Boll. R. Ort. Bot. Palermo 8: 243. 1909. 



Plant much branched, often 7 meters high, dark green, its branches rather slender, somewhat 

 divergent, 9 to 11 -ribbed, the ribs rounded, the depressions between them rather shallow; areoles 1.5 

 to 2 cm. apart; spines 10 to 16, whitish with black tips, the longer 2 to 2.5 cm. long; bud oblong- 

 ovoid, short-pointed, its scales subtending a few straight white hairs 8 to 12 mm. long; corolla 2 dm. 

 long, the scales of its tube greenish brown, narrowly lanceolate, abruptly bent upward near the base, 

 acuminate, about 2 cm. long, subtending a few hairs, the outer perianth-segments pale brown, the 

 inner white, denticulate (or sometimes entire?); fruit depressed-globose, yellow, about 5 cm. long, 



