EXPLANATION OF PLATE XV. 



[Figur(!» naturjil Mizo, excupt where oIluTwi«o niitod.] 



Fig. a, lirancli from a lower limb lieariiig iiialr inllorescencc with Mdwcih in a dense duster (first week of April, 

 southern Alaliama) ; b, c, branch with two subtcrniinal anients of female llowers b(Oow which are two immature cones 

 of one season's fjrowth ; <l, detaehed male llower sliowin;; basal involueral scales, mafjiiified 3 diameters; c, gernii- 

 nating seed (February); /, same seedling one month later (Marcli) witli 7 cotyledons in the midst of which the 

 terminal bud shows the jiriniary leaves apjiearing; g, seedling about the close of the iirst season with terminal 

 cluster of true (secondary) leaves, below which are seen the withered primary leaves; li, i, transverse section through 

 base of two and three leafed leaf bundle, magnilied 50 diameters, showing outer small hyjiodennal cells, the stomata 

 ajipcaring as marginal white sjjots; next a broad band of large in-walled parenchymatous cells bearing chlorophyll, 

 within which, at the angles of the leaf, resin ducts appear as largo openings; the dark areas in the center are tibro- 

 vascular bundles surrounded by a single row of tliin-walled cells (bundle sheath). 



94 



