1957] 



THE BOTANY OF THE GUAYANA HIGHLAND— PART II 



311 



FIGS. 48-52. Navia. FIG. 48. N. semiserrata (Maguire, Cowan & Wurdack 30959). a 

 leaf, x 1; b, part of leaf-blade, x 5; c, floral bract, x 5; d, flower, x 5; e, anther, x 5 

 FIG. 49. N. mima (Maguire & Politi 27590). a, apex of leaf, x 1; b, floral bract, x 1; c 

 posterior sepals, x 1. FIG. 50. N. pungens (Maguire, Phelps, Hitchcock & Budowsk, 

 31652). a, leaf, x 1; b, inflorescence, x 1; c, floral bract, x 2; d, sepals, X 2. FIG. 51 

 N. ocellata (Maguire & Politi 27500). a, base of leaf, x 1; b, part of leaf-blade, X 5; c 

 posterior sepals, X 1. FIG. 52. N. sandwithii (Sandwith 1285). a, habit, X l / 2 ; b, flora 

 bract, x 2; c, sepals, X 2; d, petal x 2. 



