lip fern

from WordNet (r) 3.0 (2006)

lip fern
    n 1: any of various terrestrial ferns of the genus Cheilanthes;
         cosmopolitan in arid and semiarid temperate or tropical
         regions [syn: {lip fern}, {lipfern}]

from The Collaborative International Dictionary of English v.0.48

lipfern \lipfern\, lip fern \lip fern\n. (Bot.)
   any of various terrestrial ferns of the genus {Cheilanthes};
   they are cosmopolitan in arid and semi-arid temperate or
   tropical regions.
   [WordNet 1.5]