abstracts: botany 425 



mum as new genera. Under Duguetia he points out the differences 

 which separate this genus from Aberemoa of Aublet, which has been 

 treated by R. E. Fries as a synonym, but which has pedicelled carpels 

 more nearly like those of the genus Guatteria than like the crowded, angu- 

 lar, sessile carpels of Duguetia. 



In the preparation of this paper the author has been fortunate in 

 securing the loan of abundant material from the Berlin Herbarium and 

 the De Candolle Herbarium, including several types of Humboldt, 

 Bonpland and Kunth, and of Ruiz and Pavon. A critical study of these 

 has shown that Annona conica Ruiz & Pavon is identical with A. quindu- 

 ensis H.B.K., and that these plants must be placed in the recenth^ 

 established South American genus Raimondia, under the name R. 

 quinduensis; and that A. rhomhipetala Ruiz & Pavon is very closely allied 

 if not identical with A. longifolia Aubl., which becomes the type of the 

 new genus Fusaea. This plant was already set apart as a distinct sec- 

 tion by Baillon, who placed it in the genus Duguetia, with which it has 

 little real affinity. The present author therefore does not hesitate to 

 raise Baillon 's section Fusaea to generic rank. For similar reasons he 

 establishes also the new genus Geanthemum (based upon R. E. Fries 's 

 section of that name) with two South American species and points out 

 the close affinity of these to Uvaria sessilis Velloso, which Martius errone- 

 ously regarded as identical with Duguetia hradeosa Mart. W. E. S. 



