416 Lesquereux's Descriptions 



liate or pinnate ; pinnules obliquely attached to the rachis, 

 varying from the obovate and obcordate to the broadly cune- 

 ate form ; narrowed into a short broad petiole ; upper leaflet 

 larger and broadly obovate, narrowed into a longer petiole ; 

 nerves either dichotomous or simple, distinct ; stem thick, 

 channelled, slightly margined like the branches. 



Genus CYCLOPTERIS. 



14. Cyclopteris fimbriae a (spec. nov.). Leaves nearly 

 round or truncate, unequally cordate at the base ; margins, 

 especially above, fringed with long, threadlike, linear, acute, 

 flexuous, and nearly equal divisions ; nerve, flabelli-form, fur- 

 cate from the base ; nearly straight, distant, though very thin, 

 parallel, ascending to the point of the divisions or fringes. 



15. Cyclopteris laciniata (spec. nov.). Leaves orbicular, 

 quadrate ; base equal and slightly cordate, irregularly fringed 

 around by long, flexuous, acute divisions, somewhat unequal 

 in length, and united in fascicles ; nerves flabelliform, forking, 

 straight, very close and distinct ; surface covered with a coat 

 of scales. 



16. Cyclopteris undans (spec. nov.). Leaves broadly oval 

 or nearly round, emarginate at the base, or irregularly cordate ; 

 margins undulate and irregularly toothed ; nerves flabelli- 

 form, dichotomous, very slender and close, distinct, united in 

 fascicles and thickened at and near the base. 



17. Cyclopteris elecans (spec. nov.). Leaves nearly orbi- 

 cular, (the lobes of the base converging and embracing the 

 stem, and the point of attachment being nearly central,) entire 

 or slightly undulate in outline ; nerves very distinct, deeply 

 marked, radiating and dichotomous from the base where they 

 are thickened ; arched. 



18. Cyclopteris hirsuta Lesqx. (Cyclopteris trichoma- 

 noides Brongt. in parte). Leaves oval or round in outline, 

 either symmetrical or unequally cordate, sometimes kidney- 

 shaped, enlarged at the base, with equal or unequal, converg- 



