PLANT WORLD— Vol. I. 



Plate IlL 



OUTLINE AND VENATION OF FRONDS IN THE NORTH AMERICAN 



OPHIOGLOSSUMS. 



I — 0. vulgattwi. 2 — 0. Kngelmanni. 3 — O. arenarium. 4 — O. Calif ornicum. 

 5 — O. Alaska7iuni. 6 — O. raticulatuin. 7 — O. pusilum. 



