FZ volume:0 part:0 (1970) Aspleniaceae by E. A. C. L. E. Schelpe
Epiphytic or terrestrial plants with creeping or erect rhizomes and with clathrate usually dark-coloured rhizome-scales. Fronds simple or variously pinnately dissected; stipes not articulated to the rhizome and with 2 vascular strands at the base which unite upwards to form a 4-armed strand; veins free or anastomosing marginally. Sori usually linear, borne on the costal side of a vein and with a narrow or obsolete indusium. Sporangia with long stalks; spores monolete, with a perispore.