POLYPODIACEiE, 



19 



ALLANTODIA. 



Gen. Char. {Oryptogamia Filices.) Sori oblong, oblique with 

 respect to the midrib ; indusium membranous, vaulted, cylindri- 

 cal, adhering to a vein, opening inwards, finally spreading out- 

 wards. 



Named from the Greek for a sausage, to which the arched 

 indusia bear some resemblance. The species of this genus 

 require the greenhouse or stove ; the following grow well 

 in the former : — axillaris, umbrosa, and strigosa, natives of 

 Madeira ; Australis, from Australia ; and tenera, from New 

 South Wales. 



DOODIA, 



Gen. Char. {Cryptogamia Filices.) Sori lunulate, distinct, pa- 

 rallel with the midrib ; indusium membranous, superficial, fiat, 

 separating inwardly. 



Named after Mr. Doody, an investigator of cryptogamic 

 botany. Small, stiff, and rough-leaved Perns. We have D. 

 Virginica, from North America; aspera, lunulata, caudata, 

 maxima, media, Kwithiana, and hlechnoides, from Australia. 

 These grow in the greenhouse, in peat, loam, and sand. 



