JY. E. Stevens — New Jersey Palmoxylon. 



425 



slight angle. They may also be designated as " oblique bun- 

 dles." The structure of oblique bundles, according to Stenzel 

 (p. 140), differs from that of longitudinal bundles as follows : 

 " The bast portion of oblique bundles is similar to that of 

 the longitudinal bundles, though very often smaller. The vas- 

 cular region is much larger and prolonged inwards. Axially 

 to the large peripheral vessels (those nearest the phloem) and 

 separated from them by a region or zone of parenchyma, is a 



Fig. 5. 



Fig. 6. 



Fig. 5. Atypical "longitudinal" bundle of the stem, showing the bast 

 region and xylem containing two large vessels, x 65. 



Fig. 6. A "transition" bundle showing the bast region and the xylem 

 containing two large lateral vessels and numerous smaller ones, x 65. 



group of numerous smaller vessels. The anterior (peripheral) 

 vessels occur either in two lateral groups or are arranged in a cross 

 row broken up by small " rays of parenchyma." Stenzel divides 

 the oblique bundles into two classes on the basis of the arrange- 

 ment of their peripheral vessels : group A having " Zwei seit- 

 liche vordere Gefassgruppen," and group B "Vordere Gefasse 

 in einer Querreihe." The bundle shown in fig. 7 evidently 

 belongs to the second of these classes and, among the species 

 figured by Stenzel, most closely resembles P. astorn (p. 142, 

 fig. 50). The vessels of the xylem present no notable features ; 



