ETYMOLOGY. 415 



Hymenodium, hymen, membrane ; the character of the 

 frond. 



Hymenolepis, hymen, membrane, lepis, a scale ; membra- 

 neous scales covering the fructification. 



Hymenophyllum, hymen, membrane, phyllon, leaf; "Filmy- 

 leaf Fern." 



Hymenostachys, hymen, membrane, stachys, a spike ; the 

 fructification on spikes. 



Hypoderris, hypo, under, derma, skin ; the indusium under 

 the sori, like a thin skin. 



Hypolepis, hypo, under, lepis, a scale ; the sporangia under 

 the indusium. 



Isoloma, isos, equal, loma, a border or margin ; the indusium 

 and margin equal. 



Jamesonia, in honour of Dr. Jameson, a zealous botanical 

 collector, many years resident in Quito. 



Kaulfussia, in honour of D. G. F. Kaulfuss, of Halle, a cele- 

 brated writer on Ferns. 



Lastrea, in compliment to Chev. de Lastre, a French noble- 

 man, 



Lecanopteris, lekane, a basin, pteris; the sori on concave 

 lobes. 



Lepicistis, lepis, scale, Tcistis, a cysb or cell ; the sori being 

 immersed in scales, which form a cyst. 



Leptochilus, leptos, slender, cheilos, lip ; narrow indusium. 



Leptogramma, leptos, slender, gramma, a line ; short linear 

 sori. 



Leucostegia, leukos, white, steyos, a cover ; the indusium 

 being pale-coloured, approaching white. 



