EXPLANATION OF PLATE XIX. 

 [Figures natural size, except when otherwise noted.] 



Fig. a, brauch hcaiiuf; ra:ile iiiHoreseence; h, young fascicle of leaves (spring); c, d, forms of mature leaves; e, 

 transverse section of leaf bundle showing structural characters of the leaf (as cxplain<Hl for Pinus echiuata, f, f) ; 

 magnilied L'O diameters. 

 Ill 



