SELENICEREUS. 



203 



several, 2 mm. long or less; flowers 30 to 34 cm. long; outer perianth-segments and upper scales linear, 

 yellow, the outermost scales red or brownish; inner perianth-segments pure white, 10 mm. long, 

 oblanceolate, 2 to 3 cm. broad at widest point, acute; tube proper 12 cm. long, clothed with small 

 scales bearing brown hairs and spines in their axils; fruit oblong, about 8 cm. long. 



Fig. 280. — Selenicereus macdonaldiae. 



Type locality: Cited as Honduras. 



Distribution: According to Dr. Spegazzini (Anal. Mus. Nac. Buenos Aires III. 4:484), 

 it is found in Uruguay and Argentina, and he thinks that Maldonado, near Montevideo, 

 is the type locality; we know only plants in cultivation. 



Cereus donatii (Schumann, Monatsschr. Kakteenk. 13: 185. 1903), first listed in Haage 

 and Schmidt's Catalogue, seems to belong here. 



Cereus grusonianus Weingart (Monats- 

 schr. Kakteenk. 15: 54. 1905) is apparently 

 a race of this species, judging from the descrip- 

 tion and from small plants at the New York 

 Botanical Garden. 



Illustrations: Cact. Journ. 2: 135; 

 Curtis's Bot. Mag. 79 : pi. 4707 ; Fl. Serr. 9 : pi. 

 896, 897 ; Cassell's Diet. Gard. 1 : 194; Monats- 

 schr. Kakteenk. 14:57, all as Cereus macdon- 

 aldiae; Contr. U. S. Nat. Herb. 12: pi. 76. 



Figure 280 shows a flower of a plant in 

 the collection of the United States Department 

 of Agriculture ; figure 279 shows a piece of a 

 branch from a plant in the New York Botan- 

 ical Garden; figure 281 shows a fruiting branch. 



11. Selenicereus hamatus (Scheidweiler) Britton 

 and Rose, Contr. U. S. Nat. Herb. 12: 



430. 1909. 



Cereus hamatus Scheidweiler, Allg. Gartenz. 5: 371. 1837. 

 Cereus rostratus Lemaire, Cact. Aliq. Nov. 29. 1838. 



Selenicereus macdonaldiae. 



