plusminusve 1.6 mm. longa. Ovarium floris staminiferi 
valde reductum, stylo 0.6 mm. longo. 
In Mez’ key to Cybianthus, the collection cited below 
traces out to the vicinity of C. Klotzschii Mez and C. 
multicostatus Mig. The one is a Venezuelan plant; the 
other is Brazilian, but no definite locality is known for it. 
Cybianthus Duckei may be separated from C. Klotzschii 
by its narrowly elliptic (instead of obovate) leaves, by its 
smaller flowers which have the lobes of the calyx irregu- 
lar along the margin (but not pilose or glandulose), the 
filaments at least twice as long as the anthers and the 
stamens slightly exserted. From Cybianthus multicostatus 
it can be distinguished at once by the sepals which are 
not ciliate and by the great difference in the form and 
size of the stamens. 
I am pleased to name this novelty in honor of its col- 
lector, Dr. Adolfo Ducke of the Instituto Agronémico 
do Norte in Belém do Para. Dr. Ducke, over a period 
of nearly half a century, has carried on in the Amazon 
Valley the work begun by Martius and Spruce and _ has 
added immeasurably to our knowledge of the flora of this 
vast area. 
Brazit: Estado do Para, Belém, Bosque Municipal. ‘‘Silva non 
inundabili. Arbuscula floribus albis intus leviter roseis.’’ May 23, 
1946, A. Ducke 1954 (Type in Herb. Gray). 
SAPOTACEAE 
Pouteria elegans (4. DC.) Baehni in Candollea 9 
(1942) 197. 
Pouteria elegans has been known from three previous 
collections made in Amazonian Brazil: from Teffé on 
the Rio Solimées (Poeppig) and from Mandos on the Rio 
Negro and [panoré on the Rio Uaupés (Spruce). 
Brazit: Estado do Amazonas, Rio Negro, Sao Gabriel. ‘Small 
tree.’’ September 18, 1947, Richard Evans Schultes & Francisco Lopez 
8786. 
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