Microsorum pustulatum, (kangaroo fern or hound's tongue) is a species of fern within the family Polypodiaceae. This species occurs widely in New Zealand and Australia.
Microsorum pustulatum is a fern with bright green, glossy fronds often found growing on trees. The name is synonymous with Zealandia pustulata, but many sources have yet to accept the Zealandia genus. Microsorum pustulatum is an epiphytic plant growing on the surface of other plants. The plant spreads through hairy rhizomes, often bright green and brown. The fronds grow from a long stem, reaching up to 15 in (38-40 cm) long and 6 in (15 cm) wide. The fronds have a leathery texture. The undersides are covered in distinct spore capsules. These are the true signatures of the plant! The rhizomes produce fast, creeping growth, frequently covering large areas on the ground.