Nematoceras

Nematoceras
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Orchidoideae
Tribe:	Diurideae
Subtribe:	Acianthinae
Genus:	Nematoceras Hook.f., 1853
Species
see text

Nematoceras is a genus of orchids (family Orchidaceae), sometimes known as spider orchids, helmet orchids or spidery helmet-orchids, found mainly in New Zealand and its subantarctic islands, with two species on Australia's Macquarie Island. The genus was originally described in 1853 by Joseph Dalton Hooker who published his description in The botany of the Antarctic voyage of H.M. discovery ships Erebus and Terror. II. Flora Novae-Zelandiae. In 2002 David Jones, Mark Clements and Brian Molloy transferred some species of Corybas to Nematoceras but the move has not been accepted by the World Checklist of Selected Plant Families at Royal Botanic Gardens, Kew.

Species

• Nematoceras acuminatum = Corybas acuminatus – dancing spider orchid (New Zealand)
• Nematoceras dienemum = Corybas dienemus – windswept helmet orchid (Macquarie Island)
• Nematoceras hypogaeum = Corybas trilobus (New Zealand)
• Nematoceras iridescens = Corybas iridescens – big red spider orchid (New Zealand)
• Nematoceras longipetalum = Corybas rivularis (New Zealand)
• Nematoceras macranthum = Corybas macranthus – silver back orchid (New Zealand)
• Nematoceras oblongum = Corybas oblongus (New Zealand)
• Nematoceras orbiculatum = Corybas orbiculatus (New Zealand)
• Nematoceras panduratum = Corybas rivularis (New Zealand)
• Nematoceras papa = Corybas papa (New Zealand)
• Nematoceras papillosum = Corybas macranthus – silver back orchid (New Zealand)
• Nematoceras rivulare = Corybas rivularis (New Zealand)
• Nematoceras rotundifolium = Corybas rotundifolius (New Zealand)
• Nematoceras sulcatum = Corybas sulcatus – grooved helmet orchid (Macquarie Island)
• Nematoceras trilobum = Corybas trilobus (New Zealand)