Phegopteris connectilis; The Beech Fern is characterized by the triangular fronds on long stalks (more than twice as long as the fronds themselves). The secondary leaflets are joined at the base, their margins only slightly wavy. It grows in sheltered areas like lava fissures, undergrowth etc. It is reasonably common in the western regions of Iceland but rare elsewhere.° The Icelandic name for this species is Þríhyrnuburkni.
It is a member of the fern-family: Thelypteridaceae (Beech-fern family)