POLYPODIACE^. 295 



7. Lastrea elongata, Presl. 



Lastrea elongata, Presl, Tent. Pfcerid. p. 76. 



Aspidium elongatum, Sw. Syn. Fil. p. 55; Willd. Spec. PI. 5, p. 269, 



Nephrodium elongatum, Hook. & G-rev. Ic. Fil. t. 234, 



Hab. Island of Madeira. 



8. Lastrea truncata, Sp. Nov. (Tab. 27.) 



L. stipite dense paleaceo-hirsuto ; frondibus glabris pinnatis ; pinnis 

 lanceolatis acuminatis pinnatipartitis apice dentatis, laciniis lineari- 

 oblongis dentatis truncatis; rhachi costaque utrinque paleaceo-hirsutis ; 

 soris biserialibus ; indusio rotundato-reniformi integerrimo sinu pro- 

 fundo. 



Hab. Mouna Kea, Hawaii; and Mouna Haleakala, Maui, Sandwich 

 Islands : at an elevation of from 8,000 to 10,000 feet. 



Stipe from 8 to 10 inches in length, angular, the surface thickly 

 covered toith dense, long and narrow, rufous, paleaceous hairs. Fronds 

 smooth, oblong-lanceolate in outline, with a very slightly acuminated 

 point, pinnate. Pinnce alternate, seated on a very short petiole, 

 lanceolate, deeply pinnatifid, and terminating in an acuminated, rather 

 bluntly serrated or toothed point, truncate at the base, about 4 inches 

 long and 8 lines broad, of a paler colour on the under than upper 

 surface, the inferior 2 or 3 pairs rather distant and deilexed. Seg- 

 ments linear-oblong, very slightly falcate, truncate, with from 4 to 8 

 unequal sharp teeth ; the inferior pair on the 3 or 4 lowermost pinnae 

 have their margins slightly toothed or lobed. Rhachis and costa 

 paleaceous hirsute throughout. Veins on both sides considerably im- 

 mersed. Son confined to the superior half of the frond, biserial, each 

 row about equidistant between the costaaform vein of the segment 

 and its margin. Indusium of a dark brown colour, entire, round-reni- 

 form, with a deep sinus at the point of attachment. 



A well-marked species, but closely related to the preceding. 



