194 



PHAR&ACEUTICAL BOTANY 



FIG. 96. Various forms of pollen grains. Pollen from Typha latifolia (A), 

 Zea mays (B), Ambrosia elatior (C), Lilium philadelphicum (D), Pinus (E), 

 Ranunculus bulbosus (F), Carpinus caroliniana (G), Althcea rosea (H), Oenoihera 

 biennis, (7). All highly magnified. Drawing by Hogstad. 



