1960] 



ANATOMY OF GUAYANA XYRIDACEAE 



ST 



which is about three layers thick. A number of scattered bundles are present 

 in the ''pith" region. 



3. A. americana (fig. 48). The cortical region of the inflorescence stem is 

 notable for the occurrence of pockets (which run longitudinally in the exis) 

 of collapsed parenchyma cells — like those which occur in a similar manner in 

 the leaves of this species. The collapsed parenchyma pockets occur alternately 

 with bundles of the outer circle. The remainder of the cortical region consists 

 of globular parenchyma cells. The bundles adjacent to the outer margin of 



Figs." 48-52. Portions of transections of inflorescence axes of Abolboda. exterior above. 

 Fig. 48. A. americana. Fig. 49. A. acicularis var, acicularis. Fig. 50. A. ciliata Fig. 51. 

 A. linearifolia. Fig. 52. A. sprucei. Scale = 0.5 mm in 0.1 mm subdivisions. 



