AN ENUMERATION OP CULTIVATED FERNS. 157 
36. L. elongata, Presl. Polypodium elongatum, Ait. Aspi- 
dium elongatum, Siv. ; Hook, et Grev. Ic. Fit. t. 234. — 
Madeira. 
37. L. varia, Moore. Polypodium varium, Linn. Aspidium 
varium, Siv. ; Hoolc. Sp. Fil. 4, t. 226. Lastrea 
opaca, Hook . — China, Japan. 
38. L. Mapoleonis, J. Sm. Aspidium Napoleonis, Bonj , 
Hook. Sp. Fil. 4, t. 255. — St. Helena. 
39. L. marginalis, Presl. Polypodium marginale, Linn. 
Lowe's Ferns, 6, t. 26. Aspidium marginalis, Sic. 
Schk. Fil. t. 45 B ; Loive's Ferns, 6, t. 6. — North 
America. 
40. L. Goldiana, Presl. Nephrodium Goldianum, Hook, et 
Grev. Ic. Fil. t. 102.— North America. 
41. L. erythrosora, J. Sm. Nephi'odium erythrosorum, 
Eat.; Hook. Sjo. Fil. 6, t. 253. — Japan. 
42. L. Mexicana, Lieb. Nephrodium Mexicanum, Presl. 
Aspidium Mexicanum, Kunze . — Mexico. 
ttt Fronds tripinnate, 6-10 feet long; stipes thick, 
paleaceous ; pinnae 2-2 % feet long, more or less villose; pinnules 
4-8 inches long, lanceolate-acuminate, deeply pinnatijid ; seg- 
ments entire or pinnatifidly lobed ; ultimate lobes unisorous. 
Indusium almost peltate. (Megopteris.) 
43. L. villosa, Presl. Polypodium villosum, Sw. (Plum, Fily 
t. 27). Aspidium villosum, Sw.; Schk. Fil. t. 46. 
Nephrodium (Lastrea) villosum. Hook. Sp. Fil. 
t. 264. — West Indies. 
ft+f Fronds lanceolate or deltoid, bi-tripinnate, generall; 
fragile, crenate, dentate, or unequally laciniated, often spinulose 
Veins forked. (Lophodium.) 
44. L. dilatata, Presl ; Lindl. and Moore's Brit. Ferns, t. 22 ; 
Sowerby's Ferns, t. 13. Aspidium dilatatum, Sm.; 
Eng. Bot. t. 1461. Nephrodium spinulosum, var. 
dilatatum, Hook. Brit. Ferns, t. 19. 
