238 



F I L I C E S. 



and are quite evident to the naked eye. Primary and lower second- 

 ary pinnae distant, petiolate, somewhat rhombic-lanceolate, tapering 

 gradually into an acuminate serrate point, the base more or less 

 unequal, owing to the lower and superior divisions being longer, and 

 standing more at right angles with their support than the inferior 

 ones. Pinnules oblong-lanceolate, the lower ones deeply pinnatifid, 

 while towards the apex they are cut into sharp teeth ; the segments 

 lanceolate in form, oblique at the base, and somewhat falcate. Sori 

 few, small, seated near the inner edge of a tooth or serrature. Indusium 

 semi-oblong, half cup-shaped, furnished with one or two blunt teeth 

 on the upper margin. 



This species is allied to Davallia (Microlepia) Amboynensis of 

 Hooker ; from which it differs in the form of the indusium, in the 

 greater size of its fronds, and in the presence of papillose tubercles on 

 their surface. 



Plate 34. — Fig. 1. A portion of a frond, of the natural size. 1 a. 

 View of the under side of a smaller portion of the same, showing the 

 tubercles. 1 b. Smaller portion, showing a single sorus, with the 

 special indusium removed. 1 c, c. Sporangia. 1 d. Sporules. — The 

 details more or less magnified. 



5. Microlepia polypodioides, Presl. 



Microlepia polypodioides, Presl, Tent. Pterid. p. 125. 



Dichsonia polypodioides, Sw. Syn. Fil. p. 137 & 356; Willd. Spec. PI. 5, p. 488. 



Davallia flaccida, E. Br. Prodr. Fl. Nov. Holl. p. 157. 



D. polypodioides, Don, Prodr. Fl. Nep. p. 10 ; Hook. Spec. Fil. 1, p. 181. 



Hab. Feejee and Samoan Islands. Mount Majaijai, Luzon, 

 Philippine Islands. 



To this Sir William Hooker, in his Species Filicum, has united, 

 doubtless correctly, a vast assemblage of species of different authors ; 

 the species being subject to great variation in the hairiness of its 

 veins, costa, rhachis, and indusium, as well as in the form and 

 incision of the ultimate divisions of its fronds. 



