218 F I L I C E S. 



taculum sporangiferum interruptum transversim ccmnexis. Sori dis- 

 tantes. Indusium linear i-oblongum, rnarginem pinnae, fere adceqnans. 

 /Sporangia pedicellata. 



The genus here proposed, with some hesitation, embraces three 

 Ferns of the Sandwich Islands, which differ from ScMzoloma princi- 

 pally in their interrupted sori. In this respect they have a considera- 

 ble affinity with Synaphlebium ; but in that genus the costa is eccen- 

 tric or wanting. 



1. Diellia erecta, Sp. Nov. (Tab. 31.) 



D. frondibus caespitosis glabris elongato-lanceolatis pinnatis; pinnis 

 subsessilibus subalternis horizontalibus subcoriaceis lineari-hastatis 

 repandis basi truncata superne auriculatis • indusio margine bre- 

 viori; stipite elongate cum rhaclii subtereti Icevi nudo rufescente antice 

 bilineato. 



Hab. Sandwich Islands : in mountain forests of the western divi- 

 sion of Maui. 



Fronds tufted, from 12 to 15 inches in length, of an elongated- 

 lanceolate form, rather rigid, glabrous, pinnate. Pinnos horizontal, from 

 40 to 50 in number, somewhat linear-hastate, subcoriaceous, about 2 

 inches in length by 3 lines broad, somewhat alternate, the inferior ones 

 about an inch apart, but more approximated towards the apex of 

 the frond, the margin repand and entire, the base broad and truncate, 

 its superior half auriculate and twice as broad as the inferior one : 

 usually there are one or two pairs of short ovate pinnae present at the 

 base of the frond. Indusium membranaceous, of a pale straw colour, 

 and not equal with the margin. Stipe elongated, 6 to 10 inches long, 

 of a reddish-brown tint, smooth and glossy, nearly round, and furnished 

 with two narrow marginal lines in front, and a few stiff scales at the 

 base. 



Plate 31. — Fig. 2. A frond, of the natural size. 2 a. Dorsal view 

 of a section of a fertile pinna. 2 b, 2 b. Sporangia. — The details 

 magnified. 



