B 



Fig 68. Fibrous layer of anther-sac wall associated with dehiscence (cells elongated 

 fr^risve se to the Lher axis) in face view. A, Malva syvestris, inner tangential 

 S bars stellate, no bars on outer wall; B, Borage ^f '-f\-"- ^^^1:^1" d 

 reticulate, hgnilied; C, Lychnis dioica, inner tangential wall, bars U-shaped, curved 

 on Inner wall and ar;is extending over radial walls; D, L. dwica, outer tangential 

 wal w hout bars, showing bars o'n radial walls; E, Delphinium --"f ^' T^ ^J 

 gential wall, bars fused scllariformly; F, Enjthraea Centaunum, ^/f^ll no barT 

 layer, bars forming a mesh; G, H, Aquilcgia vulgaris, outer tangential wall no bars 

 but showing sections of bars on radial wall; 1, Alopecurus agrestis, radial wall of 

 epidermis. {After Leclerc du Sablon.) 



168 



