POLYPODIACEiE. 201 



ovate, acuminate, and varying from one to li feet in length, with a 

 stipe which is usually a little shorter than itself, sulcate in front, 

 sparsely chaffy with large, brown, attenuated palece, which are some- 

 what crowded and imbricated at the base. Ultimate divisions of 

 the frond or pinnules crowded, oblong, obtuse, half an inch to an 

 inch in length, incisely lobed or pinnatifid. Segments nearly oblong, 

 incisely lobed or serrate, with a single sorus seated near the base of the 

 sinus. Sori small, submargmal, sometimes confluent; the indusium 

 round-reniform and entire. 



This is a very neat and delicate Fern in all its parts, and is not 

 unlike some of the more deeply divided forms of Aspidium dilatatum, 

 Swartz. 



18. Lastrea rubiginosa, Sp. Nov. 



L. stipite angulato sidcato paleaceo-hirsuto ; frondihus subcoiiaeeis basi 

 tripinnatis sursum bipnnnatis; pinrm prifnariw sessilibus suboppositis, 

 secundariis oblongo-lanceolatis ; pinnulis laciniisve linear i-oblong is 

 obtusis subfalcatis crenatis; rhaclii rufo-hirsuta ; costa venisque utrin- 

 que piloso-glandulosis ; soris costce approximatis magnis solitariis;. 

 indusio eoriaceo rotundato-reniformi integerrimo. 



Hab. Sandwich Islands : in dense humid forests. 



Whole plant of a rusty brown colour. Stipe 10 to 12 inches in 

 length, angidar, sulcate in front, chaffy with copious, slender, dark- 

 brown palese intermingled with the hairs, the latter extending to the 

 main rhachis. Fronds one to li feet in length, in circumscription 

 triangular-ovate, tripinnate at the base, bipinnate about the middle, sub- 

 coriaceous; the divisions rather crowded. Primary pinnae sessile, 

 nearly opposite, divaricate and direct; the secondary ones oblong- 

 lanceolate, the inferior pinnate, the superior deeply pinnatifid or lobed. 

 Pinnules or segments linear-oblong, obtuse, subfalcate, crenate, from 

 3 to 6 lines long and 1 i to 2 lines broad ; the inferior pair always the 

 longest and broadest. Costa and veins beset with amber-coloured, 

 glandular hairs on both sides. Sori large, solitary, forming a single 



51 



