Netted Adderstongue

Description

This is a small terrestrial erect fern of up to 40 cm high. The roots are fleshy, rhizome cylindrical to subglobose, sometimes stoloniferous, giving rise to small colonies of plants. There are usually one to a few simple, ovate to lanceolate fronds with a stalk of 2-16 cm long and the lamina 1-8 x 0.5-5 cm. The base of the frond is attenuate to cordate, margin entire and apex acuminate to obtuse. The fertile spike arises from the lamina base, having a 1-20 cm long stalk and ending in a spike of 5-6 cm long. There are 20-45 sporangia pairs in two rows sunken in the fleshy spike.