Ophioglossum coriaceum A.Cunn.
"Rhizome cylindric, suberect, slightly tuberous, roots fleshy. Fronds 1-2 (or rarely 3) . . ., 1-3 in. long including the petiole and fertile spike: sterile lamina . . . 1/4-2 in. long, 1/6-? in. broad, lanceolate to ovate-lanceolate, . . . narrowed into a long cuneate base, fleshy or almost coriaceous; veins indistinct, reticulated in narrow areoles. Fertile spike 1/4-3/4; in. long on a slender peduncle which usually much exceeds the sterile lamina when mature. Sporangia 7-15 in each row."
DIST.: "Kermadec Islands, North and South Islands: Not uncommon in grassy places throughout, ascending to 3,500 ft."