nephrodium

[Gr. nephros =the kidney, and eidos form. Named from the shape of the involucre.] Bot.: A genus of polypod i a ceo us ferns, tribe Polypod erm. The sori sub-globose, dorsal or terminal on the venules; the involucre reniform, superior, attached by the sinus. Extensively spread over the globe. Known species 224. These all belong to the sub-genus Lastrea, in which the veins are free. They are Nephrodium felix - mas , the Male Fern; N. cristatum , the Crested; N. rigidum , the Rigid; N. spinulosum , the Prickly Toothed; N. æmulum, the Dwarf; N. thelypteris , the Marsh; and N. ore opter is , the Heath Shield Fern. The rhizomes of N. esculentum are eaten in Nepaul. That of N. felir mas is considered in India to be anthelmintic, and is given specially for tape-worm. IMG:content-1644.png:[blocks in formation] lithos a stone.] něph-ro-lith-ic, a. [Gr. nephros =a kidney, and Med.: Pertaining or relating to the stone, or calculi, in the bladder.