PLATE VIII. 



25. A minute portion of a Hop leaf, viewed from its under side as an 



opaque object, and highly magnified to show the lupulite 

 grains. 



26. The seed of the hop, cut horizontally. 



a, I. The outer seed coat, consisting of four or five rows of 

 thick-walled cells with irregular outlines. 

 2. Double-pointed ligneous cells, lined with sderogen and 

 with intercommunicating channels, w are the ends of 

 elongated woody fibres, situated at right angles to 

 these. 



h, 3. These thin layers of cells constitute a thin pellicle 

 coloured bright green. 



4. A layer of oblong transparent cells. 



5. Another layer of thin-walled transparent cells ; and at 



right angles to these, underlying them, — 



6. A series of coloured cells with thick walls overlying — 



f, 7. The albumen, containing much oil, here seen in globules 

 forced out of the cells. 



27. A small portion of the acorn-cup of the Valonia Oak, magnified, 



showing the woody cells lined with sderogen {to) lying amongst 

 the cellular tissue (e) ; h h, are the hairs on the exterior. 



28. A portion of same, highly magnified, a a. are groups of large 



porous cells, which when dissected out are seen to have large 

 intercommunicating channels : fig. 31. 



29. 30. Branched and simple hairs, very highly magnified. 



