202 



run CACTACKAE. 



buds covered with long white hairs; flower 25 cm. long; outer perianth-segments narrow, m 2 or 3 

 series, brown, or inner series yellowish, acuminate, 8 to 9 cm. long; inner perianth-segments shorter 

 and broader than the outer, pure white, entire, acute; filaments numerous, included; style not pro- 

 jecting beyond the stamens, 17 to 18 cm. long; stigma-lobes linear, about 20; scales on the ovary and 

 tube spreading, 4 to 6 mm. long; fruit not known. 



J. A. Shafer on Cayo Romano 



from 



Washingt 



May 2, 1915, in 

 irs on the flower- 



segments 



Figure 278 is from a photogra 



Fig. 278. — Selenicereus brevispinus. 



f 



A. 





/ 



9. Selenicereus boeckmannii (Otto) Britton and Rose, Contr. U. S. Nat. Herb. 12: 429 



1909 



Cereus boeckmajinii Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 217. 

 Cereus irradians Lemaire, Illustr. Hort. 11: Misc. 74. 1864. 

 Cereus eriophorus Grisebach, Cat. PL Cub. 116. 1866. Not Pfeiflfer, 

 Cereus vaupelii Weingart, Monatsschr. Kakteenk. 22: 106. 



1850 



1837. 



1912. 



green, i to 2 cm 



ing; areoles at first brownish but white in age; spines and hairs in the areoles at first purphsh, the 

 spines 3 to 6, becoming yellowish, 2 mm. long or less; flowers not fragrant, 24 to 39 cm. long; outer 

 perianth-segments and scales linear, brownish; inner perianth-segments oblanceolate, 10 cm. long 



cm 



linear, acute, reddish scales, their axils bearing long brown silky hairs and brown bristles; filaments 

 greenish, long, slender, and weak; style greenish, about 4 mm. in diameter; ovary strongly tuberculate; 

 fruit globular, 5 to 6 cm. in diameter. 



Type locality 

 Distribution 



Hispaniola, and eastern Mexico; introduced into the Bahamas 



Illustration: Roig, Cact. Fl. Cub. pi. 3, f. 3. 



specimen collected by J 



from a specimen 



York Botanical Garden, May 



Fig. 279.— Piece of branch of S. macdonaldiae. X0.5. 



10. Selenicereus macdonaldiae (Hooker) Britton and Rose, Contr. U. S. Nat. Herb. 12: 430 



1909 



Hooker 



1853. 



The old stems always terete, 10 to 1 5 mm. in diameter ; younger stems somewhat 5-angled, giving 

 off aerial roots, with rather prominent, flattened tubercles i to 5 cm. apart, 2 to 3 mm. high; spines 



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