CS2 



PROFESSOR F. 0. BOWER ON 



tridium) oblitjuum, in which the cotyledon is termite, closely resembling that of 

 Helminthostach ys. 



The leaves of Ophioglossum show reticulated venation.* This feature may be 



Jig. 16. — Distal end of a leaf of Butrychium Jenmani. ( x 4. ) 



held as a strong indication of the advance of the genus along relatively modern 

 lines. The juvenile leaves have not been examined in detail ; but from Campbell's 

 drawings of them in 0. moluccanum and allied species t it would appear that the 

 venation at the base of the blade is of the type seen in Helminthostachys, but 



Fig. 17. — Relatively juvenile leaf of 

 * Botrychium Lunuria. (x 4.) 



reticulately developed in the distal region. Thus the fusions of veins appear early 

 in the ontogeny, as has been seen to be the case also in Kaulfussia, and others 

 where the venation of the adult is reticulate. 



* See Prantl, Ueitraye zur Systematilc der Ophioglossaceen, 1884, Taf. 7, 8. 

 f Eusp. Ferns, p. 12, fig. 2. 



