64 Dr. W. C. Williamson on 



Medullary Axis and its Primary Xylem. 



N. — p. 289, Fig. 1 A. Fig. 3a Medullary Cells, 3b Primary Xylem. 



p. 289. Fig. ih. Fig. 2B, C.N. 1303. 

 N. — p. 289, Fig. 5, b.candb.c.,* C.N. 1303. 

 N.— p. 389, Fig. 4d secondary vascular laminae ; 4b secondary medullary 



rays, C.N. 1303. 

 N. — p. 389, Fig. 4g,g extensions of primary medullary rays. See also 

 Fig. ig, C.N. 1302. 



Longitudinal. 



Radial. 



N. — p. 291, Fig. 9, including secondary xylem and cortex, C.N. 1628. 

 p. 291, Fig. 9A, vasculo-medullary axis . a, medullary cells; b, 



tracheids of primary xylem. 

 p. 291, Fig. 9B; d,d, secondary xylem; h,h, medullary rays. 



Phloem Zone C. 



Transverse. 



N.— p. 290, Fig. iC, C.N. 1302. 



p. 290, Fig. ik, defined Phloems of separate Vascular bundles. 

 C.N. 1302. See also Fig. 5k, C.N. 1303, and 4k. 



Phloem Rays. 



N. — p. 290, Fig. in, C.N. 1302; p. 290, Fig. 2n, C.N. 1303; p. 292, 

 Fig. 13m C.N. 1619; p. 290, Fig. 4n,n, C.N. 1303. 



Cortex, Inner. 



Transverse. 



N.— p. 290, Fig. ip, C.N. 1302. 



p. 290, Fig. 2p, C.N. 1303 ; p. 290, Fig. 3p, C.N. 301. 



Phloem Zone and Inner Cortex. 

 Longitudinal. Radial. 



Secondary Medullary Rays. 



N.— p. 291, Fig. 9hh, C.N. 1628. 



Phloem Rays. 



Transverse. 



N. — p. 291, Fig4n,n. 

 Longitudinal. 



N. — p. 291. Fig. 9cn, C.N. 1628. 



Phloem Tubes— Sieve Tubes or Cambiform Cells. 

 N.— p. 291, Fig. 9I, C.N. 1628. 



Phloem. 



Tangential. 



N. — p. 291, Fig. iol (Sieve tubes?), C.N. 1622. 



* Two bundles pushed outwards from their normal position as a regular portion of the 

 secondary xylem cylinder. 



