APPENDIX. 267 



On page 19, vol. 11, insert: , 



25. Cereus trigonodendron Schumann, Bot. Jahrb. Engler 40: 413. 1908. 



Simple, or in age with a much branched top, 15 meters high; trunk 5 meters long, smooth, 

 3 dm. in diameter or more; ribs 3 to 6, 2 to 3 cm. high; areoles in young growth 2 to 3 cm. apart, 

 producing abundant white wool, i cm. long or more; spines 4 to 7, at iirst brown, subulate, 2 

 to 5.5 cm. long; flowers as in typical species of Cereus, 10 to 15 cm. long; fruit smooth, edible. 



Type locality: Department of Loreto, Peru. 



Distribution: Valleys of eastern Peru and Bolivia. 



This species is briefly described on page 19 of volume 11 of The Cactaceae, but at 

 that time we knew little about it and were disposed to exclude it from the genus Cereus. 

 We have since had a photograph of the type specimen from Berlin. In December 1922 

 F. L. Herrera sent us flowers from the Santa Ana Valley, province of Convencion, Peru, 

 and in February 1923 we received herbarium specimens of branches and flowers from 

 W. E. Meyer, collected in 1922 at Cachucla-Esperanza, Boni, Bolivia. It is found only in 

 the Atlantic drainage of Peru and Bolivia and is therefore geographically within the range 

 of the genus Cereus as limited by us. 



Illustration: Bot. Jahrb. Engler 40: pi. 10. 



Figure 239 is from a photograph sent by Dr. Vaupel from Berlin. 



Fig. 239. — Cereus trigonodendron. 



On page 20, vol. 11, add at end of page : Cereus amalonga and its variety cristata are 

 described in the Cactus Journal (2: 93, 104, 119) and both are illustrated in the plate for 

 August of that volume. They are said to have been imported from Mexico. We are 

 unable to identify these plants either from the descriptions or illustrations. 



On page 21, vol. 11, under Cereus lormata, insert: We listed Cereus lormata among the 

 species unknown to us but we have since seen an illustration (Wiener 111. Gart. Zeit. 11: 

 pi. 3, in part) of a barren plant. It has about 10 vertical ribs with clusters of subulate 

 spines, some of them greatly elongated. It is probably not a true Cereus. 



On page 21, vol. 11, at end of Cereus add: Cereus perviridis Weingart is advertised by 

 Haage & Schmidt (Cat. 1914). We have seen a cutting but do not know its relationship. 



Cereus pitahaya variabilis Weingart (Monatschr. Kakteenk. 16: 158. 1906) is only a 

 form and is not described. 



