Figs. 44-60. — Figs. 44-52, series of transverse sections through young ovule 

 (about age shown in fig. n) showing normal vascular situation at various levels, 

 corresponding to dotted lines figured in mature ovule of fig. 43; fig. 44, two bundles 

 from primary shoot; fig. 45, closed cylinder; fig. 46, bundles to first pair of scales; 

 fig. 47, bundles to second pair of scales; fig. 48, cylinder above second pair of scales; 

 fig. 49, bundles to third pair of scales; fig. 50, cylinder of four bundles in base of ovule; 

 fig. 51, two bundles resulting from pairing of four cylinder bundles; fig. 52, cross- 

 section of young ovule, showing two vascular strands in integument and cyclic 

 arrangement of three pairs of scales; X24. 



Figs. 53-60. — Series of sections through mature secondary shoot and base of 

 aril showing vascular supply to 3-ridged integument and relation of xylem and phloem 

 in mature condition (note corresponding levels in fig. 43); fig. 53, bundles to second 

 pair of scales; fig. 54, to third pair of scales, one of four bundles of normal cylinder 

 lacking; figs. 55-57, each of three bundles remaining distinct, becoming broader 

 tangentially at higher levels, and in fig. 57 showing scattered tracheids outside phloem; 

 fig. 58, concentric bundle with narrow zone of continuous xylem next to phloem; 

 fig. 59, concentric bundle consisting of small phloem strand surrounded by scattered 

 tracheids; fig. 60, three phloem strands as they pass from aril to seed; X24. 



