Mr LOWE, ON MADERAN BOTANY. 527 



Nephrodium Filix ma.i. 



N. fronde glabra, bipinnato : pinnis inferioribus brevioribus : pinnulis 

 subremotis, obloiigis, obtusis, serratis, adnatis, basi inferiore arcuato-de- 

 currentibus; inferioribus serrato-incisis ; superioribus confliientibus : soris 

 biseriatis distinctis : stipite paleaceo; rhachibiis sparsim paleaceo-hirtis. 



Aspidium filix mas, Auct; Linn. Sm. Hook. &c. From English 

 specimens, gathered at Dale Abbey in Derbyshire. 



Main rhaehis sparingly hairy rather than chaffy, and the nerves and 

 margins of the pinnules beneath are not at all hairy. Pinnules subre- 

 mote; so that the incisures are truncate or oblique at the base, or as 

 wide at the bottom as at the top in the lower pinnules. 



6. Nephrodium elongatum. 



N. fronde rigido, glaberrimo, bipimiato: pinnulis oblongis, spinuloso- 

 serratis; superioribus apice rotundatis, confluentibus ; inferioribus sub- 

 lanceolatis, acutiusculis, crenato-incisis, distinctis, subpetiolatis s. basi 

 utrinque incisis; incisuris triangulari-decurrentibus : soris biseriatis, con- 

 fertis, subimbricatis nervo approximatis ; indusiis glanduloso-scabris : 

 stipite elongate rhachibusque pallidis, paleaceis; paleis rhachidum raris, 

 sparsis, distinctis, squamiformibus. 



N. elongatum, Hook, et Grev. Icon. Fil. t. 234. 



Aspidium elongatum, Sw., &c. 



Hab. in Madera ab alt. 1500 ad 5000 ped. vulgaris. 



Fronds not growing in a circle, of a much lighter and brighter 

 green than in the two preceding species, and of a rigid brittle texture : 

 with a greater tendency to a farther degree of decomposition than even 

 N. Filix mm. Pinna?, in full-sized specimens of 3 or 4 feet long, 

 more remote and distinct; the lower ones not shorter than the rest' 

 but rather the contrary. Upper pinnules close togetiier; so that their 

 edges often touch or even overiap each other, concealing the incisure; 

 except at the base, where, by the incisure being produced downwards 

 into the substance of the pinnule next below, and similariy, though in 

 a less degree and sometimes not at all, into the pinnule next above, 

 there is formed in all a kind of triangular hole, or open space, quite 



