A beautiful and hard to obtain species from Japan and Korea. It is hardy (zones 5-9), evergreen and grows to an eventual height of 60-90cm. The common name seems to refer to the visibility of the sori and veins from the top of the frond. This fern certainly has a distinct appearance with its almost glassy fronds.

It prefers slightly moist soil and light shade, a mulch will help achieve the preferred soil conditions. Its delicate looking arching fronds make a dramatic contrast with other ferns growing nearby. This fern is also very suitable for containers.