ETYMOLOGY. 331 



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

 leaf Fern." 



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

 tification 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. 



Isoetes, isos, equal, etes, the year ; remaining the same through- 

 out the year. 



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

 and margin equal. 



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 nobleman. 

 Lepicistis, lepis, scale, Tcistis, a cyst or cell ; the sori being im- 

 mersed 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, stegos, a cover ; the indusium being 



pale-coloured, approaching white. 

 Lindsaea, in honour of Dr. Lindsay, of Jamaica, a writer on 



the germination of mosses and ferns. 

 Lithobrochia, lithos, a stone, brocha, spots ; the areoles of the 



reticulated veins like pavement. 

 Llavea, named by Lagasca after a Mexican traveller. 

 Lomaria, loma, a fringe or border ; relating to the indusium. 

 Lomariopsis, lomaria, opsis, like ; like Lomaria. 

 Lonchitis, logche, a lance ; form of pinnae. 

 Lopholepis, lophos, a crest, lepis, scale ; the sori being furnished 



with a tuft of slender scales. 

 Lophosoria, lophos, crest or tuft ; sori furnished with hairs like 



a tuft. 

 Lorinseria, in honour of Gustave Lorinser, a Bohemian 



physician. 

 Loxsoma, loxos, oblique, soma, band ; the oblique broad ring of 



the sporangium. 



Lycopodium, lykos, wolf, pous ; foot-resemblance. 

 Lygodium, lygodes, flexible ; climbing plant. 



