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MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



[VOL. 10 



corolla 5 mm longa, lobis ca. 3 mm longis, ovatis, aeutis; filamenta basi solum 

 connata, ca. 40 mm longa ; ovarium lineare, puberulum, lateraliter unisulcatuin ; 

 fructus ca. 75 mm longus, 10 mm latus, angustissime elliptieus, mucronatus, 

 puberulus, margine incrassatus ; semina oblonga, 8 mm longa, 6 mm lata, latera- 

 liter compressa. 



Type Collection: B. Maguire, R. S. Cowan, & J. J. Wwrdack 30705 (holotype 

 NY), " shrub or tree to 6 m. Anthers red, with extreme base white. Perianth 

 white with reddish tips. Frequent on cumbre and slopes of Cerro Yapacana, 

 Terr. xYmazonas. Venezuela. Jan 3, 1951." Paratypes: same data and collectors, 



30633. 30671. 



The relatives of this species occur in such distant regions that they might 

 easily be completely overlooked. The nearest, morphologieally. of these is appar- 

 ently C. calycina, but C. hirsuticaulis is almost as closely allied. Both species 

 and most of their relatives are natives of southeastern Brazil. C. tsugoides may 

 be distinguished from both by the number and shape of the pinnae, number of 

 pairs of leaflets, pubescence and size of the flowers, and the length of the staminal 

 tube. From C. rigida, a species of British Guiana, which appears to be similar, 

 C. tsugoides differs in number and shape of pinnae, pubescence of flowers, size 

 and persistence of stipules, etc. 



Pithecellobium arenarium Dueke. 



VENEZUELA: Amazonas: Cano Prof undo, North Branch, elev. 1600 m, Cerro Sipapo, 

 Maguire & Politi 28215 ; frequent shrub or small tree, rim head of South Basin, elev. 2100 m, 

 Cerro Sipapo, Maguire $• Politi 28653; West Rim Cumbre of Serrania Paru, elev. 2000 m, 

 Cowan $ WurdacTc 31242, 31243, 31335 ; spreading tree 3 m, woodland between Savanna No. 3 

 and Gold Mine Camp, northwest base of Cerro Yapacana, 125 m elev., Maguire Wurdack 

 34558. 



There are few leguminous plants atop the sandstone tepuis of the Guayana 

 Highland and this is by far the most wide-ranging of these. "It was originally 

 described from the vicinity of Manaos and if its occurrence in the Highland 

 seems incongruous, it may be conjectured that seeds may have been distributed 

 to the lowlands by some natural agent. Morphologically, there is little doubt 

 of the identification of these collections, there is some variability in the amount 

 of pubescence on the leaflets but it appears to be in a continuous pattern. 



Pithecellobium guachapele (H.B.K.) Cowan, comb. nov. 

 Acacia guachapele H.B.K. Nov. Gen. & Sp. 6: 281. 1824. 



Several recent collections have been referred to this species and for those 

 who do not recognize the generic segregates in this complex, a combination under 

 the aggregate generic name is desirable. Certainly some of these segregates are 

 useful as subgeneric units, but most of them are very questionably retained as 

 distinct genera. 



Stryphnodendron levelii Cowan, sp. nov. 



Arbor 8 m alta, ramulis juvenilibus granulari-puberulis, glabrescentibus ; 

 petioli 30-35 mm longi, grannlari-puberuli, prope apicem glandula elliptica fer- 

 ente, rachibus 35-45 (-65) mm longis, parce granulari-puberulis, prope apicem 

 glandula rotunda ferente, petiolo secundario 5-8 mm longo, sparse puberulo, 

 rachibus secondares 40-60 mm longis, sparse puberulis; pinnae 3-4-jugatae, 

 foliolis 8-9-jugatis, alternis, petiolulo 0.5-1 mm longo, sparse pilosulo ; foliolorum 

 laminae chartaceae, valde discoloratae, glabrae (ad costam basaliter villosae 



