No. 483] STUDIES OF THE OPH lOGLOSSACE.E 



143 



of the spike, and the latter may very well be interpreted eis the 

 apex of the leaf, the lamina being lateral and closely coherent with 

 its basal portion. 



In all the species of Ophioglossum the growth of the basal part 

 of the young sporophyll is very much more active than that of the 

 lamina which remains relatively small, although the young spike 

 is conspicuous in the early stages. This is especially marked in 0. 



'pendulum (Fig. 3). Tliis is the largest of the genus, and is a 

 striking epiphyte of moist tropics of the old world, extending, 

 however, to the llau aiujii 1 shun Is. The specimens figured were 

 collected in the botaiiicul u;u-<leii at Singapore. 



In the youngest specimen siiown (Fig. 3, A), the thick fleshy 



