470 



OPHIOGLOSSALES 



The account given by Bruchmann for B. Lunaria corresponds in 

 all essentials to the above, though it differs in certain details. The octants 

 appear as usual, and are followed by less regular divisions which disguise 

 them in the resulting ellipsoid body. The limits between the epibasal 

 and hypobasal parts are lost, and owing to the late origin of the several 

 parts of the embryo, Bruchmann found it impossible to refer them 



If 2 



' 



\ 







' 



A <^ 



>- 



/ -. j- .; 



/. , , 





en 



FIG. 263. 



Botrychium Lunaria, L. The lower figure represents an old embryo with well- 

 developed foot (_/") ; Wj = apex of the first root ; j = apex of the ihizome, with the second 

 root, wj. The endophyte (en) is already in the cells, x 52. The upper figure is a 

 diagrammatic section of a seedling, with six to eight roots, of which three are in plane of 

 section. _/=foot; TOJ = first root ; w/ = roots; s = apexof rhizome ; b^ ^developing leaves. 

 X6. (After Bruchmann.) 



strictly to one or the other source (Fig. 262) The root, which is 

 organised early, grows first in a horizontal direction, and bursts laterally 

 out from the prothallus, but the remainder of the embryo rests within the 

 prothallus, where a distended foot is formed. On this ovoid cellular 

 body, and opposite to the neck of the archegonium, there arises the apical 

 cell of the axis : it is immediately overarched by a small growth 

 (apparently on the same side of the axis as the root), which Bruchmann 

 takes for a rudimentary cotyledon. Up to this time the embryo has a 

 predominant root more so than in B. virginianum while the foot serves 



