POLYPODIACEiE. 219 



2. DlELLIA FALCATA, Sp. Nov. (Tab. 31.) 



D. rhizomate globoso; stipite brunneo tereti brevi crebre paleaceo; fron- 

 dibus ccespitosis glabris lanceolatis falcato-decurvis basi attenuatis 

 pinnatis; pinnis sessilibus coriaceis subalternis horizontalibus lineari- 

 ensiformibus (imisve parvis deltoideo-ovatis) repandis basi truncata 

 superne auriculatis; indusio svhlineari marginem adcequante. 



Hab. Kaala Mountains, Oahu, Sandwich Islands : on open and dry 

 rocky ridges ; rare. 



Rootstoch short and globular. Stipe about 2 or 3 inches long, terete, 

 of a dull brown colour, and densely chaffy with ligulate, membra- 

 naceous, entire, reticulated palese. Fronds few, tufted, rather rigid, 

 lanceolate, slightly attenuated at the base, having a graceful, falcate 

 curve, pinnate. Pinnae, sessile, horizontal, glabrous on both sides, 

 coriaceous, linear-ensiform, approximate; their margins slightly re~ 

 pand; the base truncate, broad and unequal, the superior half auricu- 

 late and twice the breadth of the inferior one; the terminal pinna 

 short and hastate, the small ones at the base deltoid-ovate or cordate. 

 Rhachis naked, smooth, slightly margined. Indusium usually equal 

 with the margin, almost linear, sometimes semiiunate. 



This differs from the preceding species in its shorter and paleaceous 

 stipe ; in the falcate fronds tapering at the base ; and in having the 

 indusium about equal with the margin. 



Plate 31. — Fig. 1. Portion of a plant, of the natural size. 1 a. 

 Dorsal view of a section of a pinna. 1 b. Scale from the stipe. 1 c, 

 1 c. Sporangia. — The details magnified. 



3. DlELLIA PUMILA, Sp. Nov. 



D. rhizomate ccespitoso; stipite nudo atro nitente filiformi; frondibus 

 coriaceis glabris lineari-lanceolatis pinnatis; pinnis alternis confertis 

 sessilibus triangulari-ovatis repandis basi truncata superne auricu- 

 latis; indusio stramineo marginem adoequante. 



