Diuris chryseopsis, commonly known as common golden moths or small snake orchid,[1] is a species of orchid that is endemic to south-eastern Australia. It is a common and widespread species growing in woodland, often in colonies and has up to four drooping, golden-yellow flowers. It is similar to several other orchids and form hybrids with some other Diuris species.
Diuris chryseopsis is a tuberous, perennial herb with two to five, sometimes up to eight green, linear leaves NaNsigfig=1NaNsigfig=1 long, NaNsigfig=1NaNsigfig=1 wide in a loose tuft. Up to four drooping, lemon yellow flowers with brownish markings and NaNsigfig=1NaNsigfig=1 wide are borne on a flowering stem NaNsigfig=1NaNsigfig=1 tall. The dorsal sepal is more or less erect, egg-shaped to lance-shaped, NaNsigfig=1NaNsigfig=1 long, NaNsigfig=1NaNsigfig=1 wide. The lateral sepals are linear to lance-shaped, NaNsigfig=1NaNsigfig=1 long, NaNsigfig=1NaNsigfig=1 wide, and turned downwards. The petals are lance-shaped to narrow egg-shaped, NaNsigfig=1NaNsigfig=1 long, NaNsigfig=1NaNsigfig=1 wide on a blackish stalk NaNsigfig=1NaNsigfig=1 long and are directed sideways. The labellum is NaNsigfig=1NaNsigfig=1 long and has three lobes. The centre lobe is egg-shaped to heart-shaped, NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide and the side lobes are oblong to wedge-shaped, NaNsigfig=1NaNsigfig=1 long and NaNsigfig=1NaNsigfig=1 wide. The labellum callus is densely hairy or pimply near its base and tapers towards the tip of the labellum. Flowering occurs from August to October.[2] [3] [4] [5]
Diuris chryseopsis was first formally described in 1998 by David Jones from a specimen collected in a paddock near the Symmons Plains Raceway.[6] The specific epithet (chryseopsis) is derived from the Ancient Greek words chryseos meaning "golden"[7] and opsis meaning "sight", "look" or "appearance", referring to the colour of the flowers.
Common golden moths grows in moist places in forest, woodland and grassland. It is found in south-eastern New South Wales, Tasmania and in Victoria where it is widespread and common. It may also occur in south-eastern South Australia. It is similar to other Diuris species and often forms hybrids with some that occur in the same area.[8]