3°4 



BOTANICAL GAZETTE 



median of the three larger bundles supplies the bract of the fertile 

 sporophyll; each of the lateral bundles twists so as to lie with xylem 

 facing the bract bundle, then the two unite into one bundle which 

 proceeds into the scale. The single bundle increases in size, and 

 on nearing the chalaza of the ovule breaks into three; at the base 

 of the ovule each of the lateral branches curves over and passes 

 downward in the tissues of the scale flanking the ovule. The 

 median bundle proceeds slightly farther, then curves over the base 

 of the ovule, and at the same time breaks into two branches which 

 pass downward in the portion of the scale on the dorsal side of the 

 ovule. The recurved branches of the scale supply fork so that 



Figs. 183-186. — Phyllocladus alpinus: fig. 183, longitudinal section of young 

 strobilus, aril (a) appearing around the base of the ovule; figs. 184, 185, scale (s) 

 bundles unite to form a semicircle; fig. 186, transverse section of an older sporophyll, 

 bract bundle (A) forks in this instance, scale bundle (s) ends at base of ovule; X61. 



in cross-section a ring of bundles with xylem facing outward 

 surrounds the ovule. 



In another species of Podocarpus investigated the scale bundle 

 divides into two instead of three branches. Each of these two curves 

 at the chalazal end of the ovule and passes downward, one at each 

 side of the ovule. The crests of the two curves are connected by 

 irregular xylem cells, and a strand of similar tissue extends from 

 each crest outward into the protuberance on the scale behind the 

 ovule. 



Phyllocladus alpinus (figs. 183-186) consists of a globose stro- 

 bilus of few sporophylls. The ovule is sessile in the axil of the 

 bract. The vascular supply to the bract springs from the base 



