ETYMOLOGY. 331 



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

 leaf Fern." 



Hymenostachys, hymen, membrane, staehys, 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, ctes, the year; remaining the same through- 

 out the year. 



Isoloma, isos, equal, loma, 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 noblcmaii. 

 Lepicistis, lepis, scale, Msiis, 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 bein^ 



pale-coloured, approaching white. 

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



the germination of mosses and ferns. 

 Lithobrochia, lithos, a stone, broclia, 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, logclie, a lance ; form of pinnce. 

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



with a tuft of slender scales. 

 Lophosoria, loj'hos, crest or tuft ; sori furnished with hairs like 



a tuft. 

 Lorinseria, in honour of Gustave Lorinser, a Bohemian 



physician. 

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



the sporangium. 

 Lycopodium, h/Tcos, wolf, pous ; foot-resemblancft 

 Lygodium, lygodes, flexible ; climbing plant. 



