130 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN [Vol. 8, No. 2 



Bredemeyera floribunda Willd. 



Liana 12-18 cm. diam., climbing to 20 m., flowers white with yellowish keel, 

 3 km. south of pump sta„, Santa Barbara Rd. to Paso Maparita, State of Monagas, 

 Maguire, Kunhardt & Politi 27290. 



Bredemeyera lucida (Benth.) A. W. Benn. 



Small tree, flowers white, savanna, Sanariapo, Maguire & Maguire 28971. 



COMBRETACEAE 



With the exception of Buchenavia capitata and 1 erminalia obovata, both of 

 wide tropical South American distribution, all the members of the Combretaceae 

 here reported and collected in the upper Orinoco basin of the Territorio Ama- 

 zonas, Venezuela, are to be associated with species of the rain-forest of the hy- 

 lea, for the most part that of the upper Rio Negro. 



Buchenavia capitata (Vahl) Eichl. 



Buttressed tree 30 m. high, 40 cm. diam., dense low-elevation forest vicinity 

 Base Camp, Rio Cuao, Cerro Sipapo, Maguire & Politi 27370. Widespread in 

 tropical South America. 



Buchenavia suaveolens (Spruce) Eichl. 



Tree 10 m. high, flowers brownish, occasional along streamside, Cano Yapa- 

 cana below Cerro Yapacana, Jan. 6, 1951, Maguire, Cowan & Wurdack 30763, 

 30765. New to Venezuela. Previously known by the type collection, Rio Negro 

 inter Barra et Barcellos, Spruce 1882; and Casiquiare, Vasiva et Pacimoni, 

 Spruce 3198. 



Buchenavia reticulata Eichl. 



Tree to 20 m. high, flowers brown, frequent riverine tree, Carlo Yapacana, vie. 

 trail to Cerro Yapacana, Jan. 6, 1951, Maguire, Cowan & Wurdack 30760, 30794* 

 New to Venezuela. 



B. reticulata is a handsome and conspicuous tree overhanging the streamside 

 between the "port" for the trail to the mountain and the Orinoco River. Flowering 

 begins before or at the time of vernation. Leaf size is variable. Our specimens 

 match very well the fruiting type from the Casiquiare, Vasiva et Pacimoni, Spruce 

 2453, hitherto apparently the only known collection of the species. 



Ramatuella HBK. Nov. Gen. 7: 196. pi 656. 1825» Genotype R. argentes HBK. 



Ramatuella is a small genus adequately marked by its more or less woody, 

 strongly equilaterally (4-)5-winged indehiscent fruit. The first described species, 

 R argentea, was collected by Humboldt and Bonpland along the Rio Atabapo in 

 Terr. Amazonas, Venezuela. Spruce later discovered a second species, R. virens, 

 near the mouth of the Casiquiare along the Rio Negro in Brazil. Ducke next col- 

 lected the third species, crispialata s from the Rio Negro. More recently Krukoff 

 and Schultes have recollected R. argentea in the Rio Negro basin in Brazil and in 

 Colombia, and Schultes has collected R virens again from the type locality 



Now, by our own material from Terr. Arnazonas, Venezuela, we add a new 

 species and a new variety to, the genus, and an additional record for Venezuela. 



Key to the Species of Ramatuella 



1. Fruit prominently beaked, the rostrum (2) 3-5 mm. long. 



2. Wings of the fruit deltoid-ovate, abruptly narrowed at the summit and 

 at the base of fruit body; beak ca. 3-5 mm. long; leaves oblanceolate 

 5-9 cm. long, densely tomentulous-subsericeous beneath. 1. Ramatuella argentea. 

 2. Wings of fruit of same width from base of fruit body to beak. 



3. Wings ample, thin; petioles and costa of the leaves glabrous or mi- 



