SECT. II 



PHANEROGAMIA 



691 



of the perianth. Possibly the superior palea represents two coherent leaves of the 

 outer whorl, but proof of this is at present wanting. 



The length of the staminal filaments, their attachment a little 



Fig. 751.— Cereals. A, Rye, Secale cereale ; B, .Spelt, Tritkam Spelta ; C, Two-ranked barlej-, 

 Hordeum mdgare, distichura ; D, Wheat, Triticum vulgare. 



below the middle of the anthers, and the extended surface offered by 

 the feathery stigmas are of value for wind-pollination (Fig. 749). The 

 fruit of the Grasses is termed i^ caryopsis ; in it the pericarp and seed- 

 coat are intimately united. The embryo lies in contact with the 



2 Y 1 



