i 9 i 7 ] HUTCHINSON— KETELEERIA 131 



The 4 meristematic regions of the cotyledonary tube, with 

 which the protoxylem is associated, and also the meristem of the 

 leaf bud, connect with the hollow meristematic cylinder of the 

 primary root. The central axis extends beyond this junction 

 point, thereby modifying the structure generally known as the 

 cotyledonary plate (fig. 15) (7, 8, 9, 10). 



Fig. 2. — Mature ovulate cones 



Summary 



The following characters of the form in question warrant a 

 genus Keteleeria, belonging to the Abietineae. 



1. Ovulate strobihis.-(i) The cones are erect (text fig. 2); (2) 

 the scales are persistent (text fig. 2) ; (3) the scale and bract are 

 separate nearly to their bases (text fig. 3); (4) there is a single 

 megaspore mother-cell (fig. 9). 



