Arthrochilus, commonly called elbow orchids, is a genus of about fifteen species of flowering plants from the orchid family (Orchidaceae) and is found in Australia and New Guinea. The flowers are pollinated by male thynnid wasps which attempt to mate with the flower and are held in place by hooks while the pollinium is transferred between insect and flower.
Arthrochilus latipes, commonly known as robust elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to the "Top End" of the Northern Territory in Australia. Each plant has from two to four ground-hugging leaves and between three and fifteen flowers during the wet season and the species often forms spreading colonies on sandstone escarpments. Like others in the genus, the flowers are pollinated by a species of thynnid wasp.
Pterostylis squamata, commonly known as the southern rustyhood or ruddyhood, is a plant in the orchid family Orchidaceae and is endemic to south-eastern Australia. Flowering plants have up to ten translucent green flowers with reddish-brown markings and a hairy, insect-like labellum. Non-flowering plants have a rosette of four to eight egg-shaped leaves. This species is very similar to Pterostylis rufa which has a narrower labellum and other minor differences.
Pterostylis calceolus, commonly known as the Bungonia rustyhood, is a plant in the orchid family Orchidaceae and is endemic to New South Wales. It has a rosette of overlapping leaves and between two and seven reddish-brown flowers with transparent "windows" and a fleshy brown, insect-like labellum. It is only known from near Bungonia.
Pterostylis umbrina, commonly known as the broad-sepaled leafy greenhood, is a plant in the orchid family Orchidaceae and is endemic to the Australian Capital Territory and New South Wales on the Southern Tablelands. As with similar greenhoods, plants in flower differ from those that are not. Those not in flower have a rosette of leaves flat on a short stalk. Plants in flower have up to six green flowers with darker green stripes with stem leaves but lack a rosette.
Chiloglottis sphaerula is a species of orchid endemic to a small part of New South Wales. It has two dark green leaves and a single green to reddish pink flower with a shiny black insect-like callus covering two-thirds of the base of the labellum but with the tip of the labellum free of callus.
Chiloglottis trullata, commonly known as the triangular orchid, is a species of orchid endemic to Queensland. It has two dark green leaves and a single small, green or pinkish flower with a shiny, dark reddish black, insect-like callus surrounded by reddish club-shaped calli covering most of the upper surface of the labellum.
Arthrochilus huntianus, commonly known as common elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to south-eastern Australia. It has no leaves but an insect-like flower which has its labellum dangling like a lure away from the rest of the flower. Because of its thin, wiry stem and small, dull-coloured flowers, this orchid is difficult to locate. Like others in the genus, the flowers are pollinated by a species of thynnid wasp. Some authorities use the name Thynninorchis huntiana for this orchid.
Arthrochilus oreophilus, commonly known as the untidy elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to near the tip of Cape York in Queensland. It has two or three leaves at its base and up to seven pale green, insect-like flowers with reddish glands on its labellum.
Arthrochilus aquilus, commonly known as the dark elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to the northern part of Cape York in Queensland. It has up to five dark green leaves at its base and up to fifteen pale green, insect-like flowers with dark reddish black glands on its labellum.
Arthrochilus byrnesii, commonly known as the sandstone truffle orchid, is a rare species of flowering plant in the orchid family (Orchidaceae) and is endemic to the far north-west of Australia. It has three dark green leaves at its base and up to fifteen greenish, insect-like flowers with dark reddish black glands on its labellum. This species is known by some authorities as Phoringopsis byrnesii.
Arthrochilus corinnae, commonly known as the swamp elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to the northern part of Cape York in Queensland. It has two or three dull bluish green leaves near its base and up to twelve pale green, insect-like flowers with shiny yellowish glands on its labellum.
Arthrochilus dockrillii, commonly known as the green truffle orchid, is a species of flowering plant in the orchid family (Orchidaceae) and is endemic to Tropical North Queensland. It has one or two dark green leaves at its base and up to twenty five greenish, insect-like flowers with red glands on its labellum. This species is known by some authorities as Phoringopsis dockrillii. There is a single record of this species from Papua New Guinea.
Arthrochilus irritabilis, commonly known as clubbed elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to Queensland. It has up to five leaves and up to thirty light greenish or reddish, insect-like flower with reddish, hair-like glands on its labellum. There is a single record of this species from Papua New Guinea.
Arthrochilus laevicallus is a species of flowering plant in the orchid family (Orchidaceae) and is endemic to Papua New Guinea. It is leafless but has up to seven green, insect-like flowers with dark reddish glands on its labellum.
Arthrochilus lavarackianus, commonly known as the glaucous truffle orchid, is a species of flowering plant in the orchid family (Orchidaceae) and is endemic to the Torres Strait and Tropical North Queensland. It has one or two bluish green leaves at its base and up to fifteen greenish, insect-like flowers with red glands on its mushroom-like labellum. This species is known by some authorities as Phoringopsis lavarackiana.
Arthrochilus prolixus, commonly known as wispy elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to eastern Australia. It has a rosette of bluish green leaves at its base and up to twenty two pale green, insect-like flowers with dark reddish to purplish glands on its labellum.
Arthrochilus rosulatus, commonly known as rosetted elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to Tropical North Queensland. It has a rosette of bluish green leaves surrounding its base and up to fifteen pale green, insect-like flowers with dark red glands on its labellum.
Arthrochilus sabulosus, commonly known as the spotted elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to Tropical North Queensland and Horn Island. It has a rosette of dull green leaves on side growth at its base and up to fifteen pale green, insect-like flowers with reddish to brownish glands on its labellum.
Arthrochilus stenophyllus, commonly known as the narrow-leaved elbow orchid, is a flowering plant in the orchid family (Orchidaceae) and is endemic to Tropical North Queensland. It has a rosette of dull green leaves on side growth at its base and up to fifteen pale green, insect-like flowers with dark red to brownish glands on its labellum.
