EXPLANATION OF PLATE XV. 



[Figures natural size, except where otherwise noted.] 



Fig. a, branch from a lower limb bearing male inflorescence with flowers in a dense cluster (first week of April, 

 southern Alabama); 6, c, branch with two subterminalaments of female flowers below which are two immature coix-.s 

 of one season's growth; <l, detached male flower showing basal involucral scales, magnified 3 diameters; e, germi- 

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

 terminal bud shows the primary leaves appearing; g, seedling about tbe close of the first season with terminal 

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

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

 appearing as marginal white spots; next a broad band of large in-walled parencliymatous cells bearing chlorophyll, 

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

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



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