192 



F I L I C E S. 



tered sori prove that it does not properly belong to that genus j while 

 the articulation of the stipe near its base shows an affinity, on the 

 other hand, with Oleandra. 



Plate 26.— Fig. 1. Fronds, of the natural size. 1 a. Upper side 

 of a pinna, lb. A. small portion of the same, seen from beneath, 

 with a perfect sorus. 1 c. Sporangium. — The details more or less 

 magnified. 



2. Lastrea distans, Sp. Nov. 



L. frondibus glabris pinnatis, pinnis distantibus subaltemis petiolulatis 

 lineari-lanceolatis acuminatis pinnatipar litis, laciniis linearibus sub- 

 falcatis apice obtuse dentatis; rhachi angulata paleaceo-hirsuta ; costa 

 subtus squamosa ; soris parvis biserialibus ; indusio rotundato-reniformi 

 lacero. 



Hab. Organ Mountains, Brazil : in shady forests. 



Of this there is in the collection only a section, about 18 inches in 

 length, of what appears to have been a very long and slender frond, 

 which is simply pinnate. Pinnae, from 3 to 4 inches apart, on a short 

 petiole a quarter of an inch long, subalternate and horizontal, linear- 

 lanceolate, acuminate, 6 to 8 inches long and li inches broad near 

 the truncated base, where they are pinnatifid doivn almost to the costa, 

 less so towards the point, which is entire and slightly serrate : seg- 

 ments linear, slightly falcate, serrate with from 3 to 4 unequal obtuse 

 teeth at the point. Elmchis angular, covered with entangled slender 

 palece and soft hairs. Costa chaffy beneath with oblong, caudate- 

 acuminate, reticulate, spinuose-serrate scales, of a darker colour than 

 the costa itself. Sori small, occupying a single row on each side 

 of the costa of the segments, nearer to it than to the margin, fur- 

 nished with a membranaceous, roundish-reniform, and slightly lace- 

 rated indusmm. 



We know not that this has heretofore been described. It differs 

 from the Aspidium invisum of Swartz, to which it is allied, by its 

 distant, horizontal, deeply pinnatifid, and petiolate pinnae. 



