AN ENUMERATION OP CULTIVATED FERNS. 153 



or decumbent. Fronds varying from pinnatifid, bipinnatifid, to 

 decompound-multifid, 1-6 feet high. Veins simple, or once or 

 several times forked, or costasform and pinnate ; vemiles free. 

 Receptacles punctiform, terminal or medial. Sori round. In- 

 dusium reniform or subrotund (as in figure), attached by its 

 sinus on the interior side. 



* Vernation uniserial, sarmentose. (Thelypteris.) 

 j- Fronds lanceolate, bipinnatifid. 



1. L. palustris, /. Sm. Thelypteris palustris, Sclwtt. Lastrea 



Thelypteris, Presl ; Lindl. and Moore's Brit. Ferns, 

 t. 29 ; Hook. Gen. Fil. t. 45 A 2 ; Sowerby's Ferns, 

 t. 7. Polypodium Thelypteris, Linn. Aspidinm 

 Thelypteris, Sw.; Sclik. Fil. t. 52; Eng. Sot. t. 1018. 

 Nephrodium Thelypteris, Desv.; Hook. Brit. Ferns, 

 1. 13. Europe. 



2. L. Noveboracensis, Presl. Polypodium Noveboracense, 



Linn.; Sclik. Fil. t. 46. Aspidium Thelypteroides, 

 8w. North America. 



3. L. invisa, Presl. Aspidium invisum, Sw. ; Sclik. Fil. 1. 18. 



West Indies. 



4. L. augescens, /. Sm. Aspidium augescens, Link ; Kunze, 



Fil. t. 59; Lowe's Ferns, 6, t. 10. Nephrodium 

 Ottonianum, Kunze. Tropical America. 



ft Fronds deltoid, decompound. 



5. L. decomposita, /. Sm. Nephrodium decompositum, 



R. Br. ; Hook. Fil. Fl Nov. Zel. t. 79 (exdus. name, 

 glabellum). Aspidium decompositum, Spreng. ; 

 Lowe's Ferns, 6, t. 33. Australia, Tasmania, and 

 New Zealand. 



6. L. velutina, /. 8m. Nephrodium (Lastrea) velutinum, 



Hook. Sp. Fil. 4, p. 145 ; Hook. Fil. Nov. Zel. t. 80. 

 Aspidium velutinum, A. Rich. New Zealand. 



7. L. pubescens, Presl. Polypodium pubescens, Linn. Ne- 



phrodium pubescens,- Hook, et Grev. Ic. Fil. t. 62. 

 Jamaica. 



8. L. quinquangnlaris, /. 8m. Aspidium quinquangulare, 



Kunze. Aspidium pubescens, Lowe's Ferns, 6, t. 25. 

 Native country unknown. 



