4E 



derably thiclcer, sometimes turning pink.ish. V/ood hard, heav;,-, 

 strong, tough, cross, wavy and fine grained, difficult to work, 

 taking a very good polish. Annual rings of growth not clearly 

 defined. 



Pores (transverse section) numerous, very small (about 

 .06 mrn. in diameter), round or irregular when in grouiis, cijen 

 in sapwood» closed in heartwood, and arranged singly 6r in 

 small groups or radial rows. Vessel walls (longitudinal sec- 

 tion) numerous, small, round or transversely elongated; pits 

 with a border, or with OGoasional transitions to simple pits. 

 Perforations simple, //ood fibers about ,9786 mm. long, ith 

 very thick walls and very small lumina, and small, slit-like 

 simple pits. Vood parenchyma strongly developed, usually 

 arranged in several rows around vessels and in tangential 

 lines, usually short, but sometimes straight or wavy con- 

 tinuous, 'J}hese lines are very faint and are barely visible 

 with the hand lens on a smooth transverse section. Kays nu- 

 merous, very narrow, from 1 to 3 cells wide and from 9 to 10 

 cells high. 



'■0-' 



Distribution, common names and uses 



This small tree is known so far only from the Canal Zone, 

 but it is likely that its range extends over a much larger 

 area. He common names has been recorded and the very hard 

 and fine grained wood does not seem to be extensively used. 



The Panaman Swartzia 



Swartzia panamensis ienth., Llart, iU. irasil. 15,2:33.1870. 



Description of the tree 



Probably deciduous, 6 to EO m. high, v/ith ascending limbs 

 and elongated crown; trunk usually distorted, seldom ever 

 40 cm. in diamter, covered with a smooth, grayish bark. 

 Leaves y-foliulate, first pubescent then glabrous; stipules 

 lanceolate, acute, silky pubescent, caducous; rachis 9 to 13 



