86 CHAEACTERS OF TEIBES AND GENEKA. 



* Veins free. 



Sect. 1.— POLTPODES. 



5. Peosaftia, Presl (1836). 

 DavaUice sp., Swariz. Hool'., S]}. Fil. 



Sicreulum sliort, Cisspitose. Fronds contiguous, linear- 

 lanceolate, pectinate-pinnalifid, 6 to 12 incbes high ; lacinia? 

 oblong or linear, obtuse. Veins simple, free, internal. 

 Beceptades terminal, seated in a marginal cyst formed of 

 the substance of the frond and containing the sporangia. 



Type. DavaUia contigua, Swartz. 



lllnst.— Hook and Grev., t. 105, 141. Moore, Ind. Fil., 

 p. 76 B. 



Obs. — The urceolate marginal cyst containing vertical 

 sporangia is analogous to the indusiate sori of Davallice, 

 but differs entirely in being formed in the substance 

 of the frond, and in having no indusiate membrane. The 

 texture and pinnate character of the fronds indicates tho 

 affinity to be with the pinnatifid section of Polypodium. 



Sj). — P. contigua {Sw.). P. Emmersoni {Moul;^. 



Natives of Ceylon, Malay, and Polynesian Islands. 



6. Crtftosouus, J'e'e (1843). 

 Folypodium, sp., Bl. Hoolc-. Sp. Fil. Gcdopteris, A. Ilr. 



Surcuhom short. Fronds contiguous, linear-lanceolate, 

 pinnatifid-pectinate, 1 to 1^ feet long. Veins of lacinias 

 simple, internal. Receptacles immersed, forming- an oval 

 cyst, the margin surrounded by incurved rigid hairs in- 

 closing the sporangia. 



Type. Polypodium oUigatnm, Plume. 



Illust.— Fee, Gen. Fil., t. 19. Blume, Fl. Jav., t. 58. B. 

 84. B. 



