ETYMOLOaT. . '297 



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

 leaf Fern." 



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

 tification on spikes. 



Hypoderria, liypo, under, derma, skin ; the indusium under the 

 Bori, like a thin skin. 



Ilypolepis, 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, 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 ferna. 



Lastrea, in compliment to Chev. de Lastre, a French nobleman. 

 Lepicistis, lepis, scale, histis, a cyst or cell; the aori being im- 

 mersed in scales, which form a cyst. 

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

 Leptogramma, leptos, slender, grartvma, a line ; short linear sori, 

 Leucostegia, leukos, white, stegos, a cover ; the indusium being 



pale-coloured, approaching white. 

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



the germination of mosses and ferna. 

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



reticulated veins like pavement. 

 Llavea, named by Lagasoa after a Mexican traveller. 

 Lomaria, loma, a fringe or boi-der ; relating to the indusium, 

 Lomariopsis, lomxiria, apsis, like ; like Lomaria. 

 Lonchitis, logche, a lance ; form of pinns. 

 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, lyTcos, wolf, pous ; foot-resemblance. 

 Lygodium, hjgodes, flexible ; climbing plant. 



