Asplenium australasicum is a species of plant

Plant

Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...

 in the Aspleniaceae

Aspleniaceae

The Aspleniaceae is a family of ferns, included in the order Polypodiales or in some classifications as the only family in the order Aspleniales....

 family found in eastern Australia.
Asplenium australasicum was originally described by English botanist John Smith in 1857 as Neottopteris australasica. He had reclassified the already known A. nidus

Asplenium nidus

Asplenium nidus is a species of fern in the family Aspleniaceae, native to tropical southeastern Asia, eastern Australia, Hawaii, Polynesia, Christmas Island, India, and eastern Africa...

in its own genus Neottopteris. Other botanists reclassified the genus as a section, Thamnopteris, within the genus Asplenium

Asplenium

Asplenium is a genus of about 700 species of ferns, often treated as the only genus in the family Aspleniaceae, though other authors consider Hymenasplenium separate, based on molecular phylogenetic analysis of DNA sequences, a different chromosome count, and structural differences in the rhizomes...

, and William Jackson Hooker

William Jackson Hooker

Sir William Jackson Hooker, FRS was an English systematic botanist and organiser. He held the post of Regius Professor of Botany at Glasgow University, and was the first Director of the Royal Botanic Gardens, Kew. He enjoyed the friendship and support of Sir Joseph Banks for his exploring,...

 gave it its current binomial name in 1859.