Stiles . — The Podocarpeae . 461 
D. Colensoi by Thibout, while the same is said to be the case in Podocarpus 
andinus , P. dacrydioides , and P. Totara} In P. spimdosus 2 and some 
other species described by Thibout 1 * 3 the dehiscence is oblique. Thibout 
also records oblique dehiscence in Phyllocladiis . 
The vascular structure of the cone axis is very similar to the primary 
vascular structure of the stem ; that is, there is a ring of vascular bundles 
surrounded by a ring of resin canals, one canal outside the phloem of each 
bundle. Saxegothaea has traces of centripetal xylem in these bundles , 4 but 
no such thing was found in Microcachrys or any of the species of Podocarpus 
examined, nor is any recorded in the case of PhyllocladusP No canals are 
present in the cone axis of Microcachrys . 
The sporophyll trace originates in the same way as the leaf-trace ; 
Text-fig. 3. Transverse sections through microsporophylls. a , Podocarpus andinus, x 32; 
b, P. latifolius , x 32 ; c, P. Totara Hallii (after Burlingame) ; d, Microcachrys, x 32. 
that is, by the division of a single bundle into two which lie side by side in 
the ring of bundles, above which point one of them passes out into the 
sporophyll. The resin canal divides similarly, and in Saxegothaeap Podo- 
carpus spinulosus , 7 and P. latifolius a canal passes into the sporophyll ; in 
Podocarpus andinus , however, the canal does not enter the sporophyll. 
The single vascular bundle in the sporophyll consists of a few xylem 
and phloem elements which require no special comment ; in the terminal 
lamina the bundle ends in a development of transfusion tissue. 
1 Thibout (’96), p. 170. 
3 Thibout (’96) p. 171. 
6 Robertson (’06). 
7 Brooks and Stiles (TO), p. 308. 
2 Brooks and Stiles (TO), p. 308. 
4 Stiles (’08), p. 212. 
6 Stiles (’08), p. 212. 
