132 



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



data vel obtusa, petiolo 15-25 cm. longo griseo-velutino; inflorescentiis axil- 

 laribus spicato-capitatis 8-10 cm. longis griseo-velutinis; floribus non visis; 

 fructibus nucamentaceis rhomboideis vel oblongo-ellipticis vel ovatis griseo- 

 velutinis 15-20 mm. longis 10-15 mm. latis valde (4-)5-alatis, alis 4-6 mm. 

 latis subligneis undulatis, rostro brevissimo 0.5-2.0 mm. longo aliquando non 

 evidentie 



TYPEs tree to 7 m. high, fruit gray-brown, occasional in caatinga around 

 Yapacana Savanna I, 125 m. alt., Cerro Yapacana, Orinoco River, Terr. Amazonas, 

 Venezuela, January 7, 1951, Bassett Maguire, R. S. Cowan & John J, Wurdack 

 30796; New York Botanical Garden. 



The var„ obtusa has been interpreted as belonging to R. crispialata because of 

 the broadly-winged barely rostrate fruit, grayish or brownish velutinous pubes- 

 cence, and general leaf form that they have in common. There are numerous ele- 

 ments of difference which suggest that ultimately, when sufficient material is at 

 hand, the two populations may have to be considered specifically distinct. 



Terminalia obovata (R. & P.) Steud. 



Small riverine tree along the Orinoco, 30 km. below La Urbana, Edo. Bolivar, 

 Venezuela, March 14-15, 1949, Maguire & Maguire 29017. Widespread in tropical 

 South America. 



Terminalia yapacana Maguire, sp. nov. 



Arbor parva 12 m. alta; ramulis glabris; foliis terminaliter approximatis al- 

 ternatis, laminis ovato-oblanceolatis vel oblongo-oblanceolatis integris 3-8 

 cm. longis 1.5-3.5 cm. latis chartaceis glabris, nervis lateralibus prominulis 

 in nervo marginali collectivo, apice obtuso aliquando aliquantum retuso, basi 

 acuta vel acuminata; petiolis 2-5 mm. longis 3-4 mm. latis; spicis axillaribus 

 6-10(-12) cm. longis glabris vel sparsissimis puberulis; floribus sessilibus, hy- 

 panthiis crateriformibus 4-5 mm. longis, stipite 0.5- TO mm. 'longo dense pube- 

 rulo, limbo campanulato ca. 2. mm. longo puberulo, lobis triangularibus acutis 

 extus puberulis intus subpilosis; corolla obsoleta; staminibus 10, 2-cyclis, fila- 

 mentis teretibus glabris, antisepalis 5 in basi limbi affixis ca. 5 mm. longis, al- 

 ternisepalis 5, in sinibus affixis ca. 3 mm. longis; ovario inferiore lineari ca. 2 

 mm. longo (4-)5-sulcato dense puberulo; stylo subulato ca. 5 mm. longo, stigmate 

 truncato papilloso; fructibus nucamentaceis ovato-oblongis vel elliptico-oblongis 

 6-8 mm. longis 5-6 mmc latis sparse puberulis aequaliter quinquealatis, alis char- 

 taceis 1.5-2.0 mm. latis. 



TYP*E: tree 8 m. high, fruit brownish-red, frequent, dominant tree in and 

 about periphery of Yapacana Savanna III, 125 m. alt., January 1, 1951, Terr. 

 Amazonas, Venezuela, Bassett Maguire, Richard S. Cowan & John J. V/urdack 

 30590; New York Botanical Garden. Paratype: shrub or tree to 12 m. high, fre- 

 quent, dominant savanna tree, particularly about border, Yapacana Savanna III, 

 125 m. alt., Maguire, Cowan & Wurdack 30480. 



7 erminalia yapacana finds its closest congener in T. quintalata Maguire 

 of the Kaieteur savanna and escarpment. The tv/o are very similar in general 

 character and habitat, the latter being a tree some 20-25 m. high, with much 

 larger leaves 5-9 x 11-17 cm., larger fruit 8 x 8-10 mm. in size, and filaments 

 only about 2.5 mm. longo It is interesting to note that T. yapacana, so far as 

 known, is restricted to the savannas about Cerro Yapacana on the western edge 

 of the Guayana Highland, while its nearest relative occupies a similar habitat 

 on the Kaieteur Savanna on the easternmost escarpment of the Guayana High- 

 land. No similar or related species are known over the intervening 700 km. of the 

 sandstone region. 



