68 



MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



| VOL. 10 



quent in savanna on left bank of Caflo Heehimoni 8 km above mouth, alt. 100-130 m; small 

 tree 2-3 m; calyx green; corolla tan-cream; filaments white, anthers yellow; 9 Feb 1954, 

 Maguire, WurdacJc $• Bunting 37624. 



The shape of the leaflets of this savanna species (the specific epithet refers 

 to the sand-inhabiting' characteristic) separates it rather easily from its nearest 

 relatives, of which P. aqudticum is perhaps as near as any. The latter species 

 is also characterized by very small, insignificant glands on leaves and in- 

 florescences; similarly placed glands are quite conspicuous in P. arenicola. 



Pithecellobium basijugum Ducke. 



VENEZUELA: Amazonas: frequent in flooded forest along uppermost Rio Yatua, alt. 

 100-140 m; small bushy tree; corolla cream; stamens basally white, apically rose; 7-8 Dee 

 1953, Maguire, WurdacTc $ Bunting 36724; along uppermost Rio Yatua, alt. 100-140 m; 

 shrub 2.5 m, cauliflorous; filaments basally white, apically pink ; 27 Oct 1957, Maguire, 



WurdacTc $ Maguire 41958. 



Ducke described this species, based on collections from northwestern Brazil, 

 but there are now more gathering's from southeastern Colombia than from 

 Brazil. This first report from Venezuela is from the adjacent region, so the 

 actual extension of range is not great. 



Pithecellobium consanguineum Cowan, sp. nov. Fig. 47. 



Arbor parva (?), ramulis glabris, conspicue lenticellatis, stipulis persistenti- 

 bus, late triangularibus, obtusis, 0.5 mm longis. Petiolus 33-40 mm longus, 

 Leyiter minute puberulus glaucusque, glandula sessili, elliptica, 3 mm longa, 1.5 

 mm lata, rhachi 5.5-7 cm longa, leviter minuto-puberula et glauca, pinnis 3-4- 

 jugatis, petiolis secondares 5-10 mm longis, rhachillis 7-9.5 cm. longis, minuto- 

 puberulis et glaueis. Foliola sessilia, glabra vel marginaliter sparse minuto- 

 ciliolata, inaequilateralia, oblonga, ad apicem acuta mucronataque, 16-18 mm 

 longa et 8-10 mm lata (foliolis terminalibus except is, his oblique lanceolatis, 

 3-3.5 cm longis, 10-15 mm latis), costa valde excentrica, venis lateralibus in- 

 conspicuis. Flores immaturi, sessiles, capitati, capitulis in racemis dispositis, 

 capitularum pedunculo 13-16 mm longo, minuto-striguloso, bracteis glanduli- 

 feris. Calyx minute strigulosus, tubo 7-8 mm longo, lobis 2-3 mm longis, ovato- 

 triangularibus, acutis; corolla pallidior quam calyce, dense aureo-strigulosa. 

 Androeciiwi et gynoecium immaturum. Fructus ignotus. 



VENEZUELA: Amazonas: Eio Guahria, alt. 120-140 m, clearing at Limoncito, left bank 

 of Cano San Miguel 15 km above mouth; 14 Oct 1957, Bassett Maguire, John J. WurdacTc $ 

 William M. Keith 41878 (holotype, US No. 2267420). 



The nearest relative of this new species is surely P. spruceanum and the 

 degree of proximity is emphasized by the choice of specific epithet for it (con- 

 sanguineus: "related by blood"). Although the flowers of P. consanguineum 

 are not fully expanded, it is obvious that they are smaller than those of its 

 near relative and the distribution of pubescence on the perianth is different. 

 The color difference between the calyx and corolla (in the dried material) of 

 the new species is also striking; the calyx is dark brown and the corolla is so 

 densely buff -pubescent as to contrast sharply with the calyx. The two species 

 also differ in number of pinnae and leaflets, and the latter are rather differently 

 shaped. 



