Tremella boraborensis
Tremella boraborensis is a species of fungus in the family Tremellaceae. It produces dark brown to black, lobed to brain-like, gelatinous basidiocarps and is parasitic on other fungi on dead branches of broad-leaved trees. It was originally described from the Society Islands and has also been recorded from Hawai'i.
Taxonomy
Tremella boraborensis was first published in 1958 by the American mycologist Lindsay Shepherd Olive based on collections made in Tahiti and Bora Bora.Description
Fruit bodies are rubbery-gelatinous, dark brown to black, up to 6 cm across, and irregularly lobed to cerebriform. Microscopically, the basidia are tremelloid, 2 to 4-celled, 14.5 to 30 by 9 to 12.5 μm. The basidiospores are ellipsoid, smooth, 8 to 11 by 5 to 8 μm.Similar species
Tremella volcanagua, described from Guatemala, is similarly coloured but has lobed fruit bodies and subglobose spores. Several species of Phaeotremella are also similarly coloured, but have foliaceous fruit bodies with thin, seaweed-like fronds.Habitat and distribution
Tremella boraborensis is a parasite on lignicolous fungi, but its host species is unknown. It was originally found on branches of the invasive Java plum.The species is currently known from the Society Islands and from Hawai'i.