144 Guaynle. 



Description of Plate 30. 



1. Hypocotyl, field seedling for station 2, April 1909, less than 8 months old. 



2. First internode, epicotyl; the primary stereome bundles. 



3. Periderm opposite bundle 1 in fig. 2. 



4. Periderm opposite bundle 2 in fig. 2. 

 5 11. Trichomes. 



