FIG. 281. Zostera. A Diagram of the branching of the floral shoots: I, 17 .... are the 

 successive shoot-genet ations, eveiy other one being shaded ; g l g 2 .... fore-leaves; sp 1 

 sp 2 .... spathes for the successive spikes. Each shoot is united for some distance 

 with the parent axis (indicated by the half-shaded internodes). Each shoot commences 

 with a fore-leaf turning towards the parent axis, g; succeeding this is the spathe, sp ; and 

 then the inflorescence. The fore-leaf supports a new lateral shoot. B Diagram of a shoot, 

 IT, which is borne laterally in the axil of the fore-leaf g lt on the shoot I, g a its fore-leaf; 

 s)i a its spathe ; sti squamula? intravaginales. II Is the gpadix with stamens and carpels; 

 b a perianth-leaf (or connective expansion, similar to those which occur in Potamogeton). 

 C The upper portion of a yonng spadix with development of flowers. D Part of n gpadix 

 with 2 flowers ; the parts which theoretically belong to one another are connected by a 

 dotted line. 



280 



