PLATE III. 



17. A barley plant, n. s. : ^, swelling caused by contained inflorescence. 



18. Part of same divided down the centre, showing the size and 



position of inflorescence {g) : a, and b, nodes of the stem. 



19. The same highly magnified, showing the divisions of the in- 



florescence into undeveloped {a), and developing {c) portions : 

 these last will form the future flowers, b is the growing point 

 of the stem just separated from the last-formed node. 



20. 1? florescence in a very rudimentary condition, highly magnified. 



21. Further development of same into lobed masses. 



22. More advanced inflorescence : in which the lobes are seen forming 



divisions amongst themselves. 



23. One of the lobes developed into a perfect floAver : c, stem, 



a a, lateral florets, b b d outer, and e inner coats of flower. 



24. Ovary (^) and one stamen (<?), separated : s, styles with feathery 



stigmas, on which a pollen granule has fallen. 



