104 CHABACTEES OF TRIBES AND GENERA. 



inches long ; the sori large, oblong, parallel with and in a 

 row on each side of the mid-rib. I have not had the 

 opportunity of examining this Fern, and therefore place it 

 here on the supposition that the vernation is articulate. 

 In the "Species Filicum," P. ierminales, P. ijettfdia, and 

 P. longipes, are united under the original name of Poly- 

 podium PJiymaiodes, but having observed them for many 

 years under cultivation, I have been led to consider 

 them to be as good species as many others described in tha 

 " Species Filicum." 



19. — Phtmatopsis, J. Sm. 

 Pohjpodium sp., auct. ; Hook. Sp. Fil. 



Surculum slender, elongating. Fronds simple, pinnatifid, 

 or sub-pinnate, 6 to 12 inches in height, smooth, sub- 

 coriaceous. Primary veins evident, cost«form, terminating 

 at or near the margin, which is thickened, and with a 

 notch between each two veins. Vennles compound, anasto- 

 mosing. Eeceptades compital, punctiform, superficial, one 

 between each two primary veins. Sori tranverse, uni- 

 serial, naked. 



Type. PoJypodium poJmatimi, Blume. 



niust. Blume, Fl. Java, t. 6i ; Hook. Ic. PL, t. 951. 



Obs. — In general habit the species of this genus are 

 similar to Pliymatodes, but the well-defined costsform 

 veins, thickened and notched margin, marks them as 

 being worthy of being adopted as a distinct group ; it 

 consists of about a dozen species, all natives of India, 

 Malay, and other tropical islands. 



* Fronds simple. 



P. accedens (Bl.) ; P. codes {Kze.) ; P. rostrata (Hook.) ; 

 P. rhjTichophylla (Hoolc.) ; P. GrifEthiana {Hook.) 



