10 HOLDEN, Abnormal Spike of OpJiioglossnni viilgatinn. 



Fig. V. 



Nos. 1-3 show the gradual separation of the vascular supply to the Imsal 



sporangiophore branch. 

 No. 4 shows the Inindle supply to the sporangia on both sides of tlie 



main system. 

 Nos. 5-9 show stages in the formation and separation of the remaining 



branches. 

 (All figures drawn with the aid of a camera lucida.) 



t;v,^„,;r.rT tVio /i«to;i ^r iK» K.in,^ii 



tKo loft =\A^ 



