Ophioderma pendulum

Ophioderma pendulum is sometimes known as the old-world adder's-tongue. In Malaysia, it is known as daun rambu.^[1] It is a fern in the family Ophioglossaceae, and is the type species of the genus Ophioderma. It is most noteworthy for the length of its pendant fronds, up to 14 ft 9 in (4.5 meters) in length and three inches (8 cm) wide produced at intervals along a tree-clinging rhizome.^[2]

Old-world adder's tongue
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Ophioglossales
Family:	Ophioglossaceae
Genus:	Ophioderma
Species:	O. pendulum
Binomial name
Ophioderma pendulum (L.) C. Presl
Synonyms
Ophioglossum pendulum L.

Ophioderma pendulum is a common epiphyte in the East Indies.

Taxonomy

Linnaeus was the first to describe this species with the binomial Ophioglossum pendulum in his Species Plantarum of 1753.^[3]