The only member of its genus so far, this Phlebosia is the result of a cross between a Pyrrosia lingua âCristataâ and Phlebodium aureum âMandaianumâ. This new hybrid sports large, downward arching crests at the apex of its wide, undulating fronds, which average about 12â long by up to 7â wide. Each frond has several sets of deeply cut lobes that virtually disappear beneath the almost overlapping pinnae on mature fronds, making it look almost like a delightfully exotic sea lettuce.