Seeds of South Australia
Diuris chryseopsis (Orchidaceae)
Golden Moths
List of species for Diuris
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Seed collecting:
January to February
Herbarium regions:
Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South East
IBRA region
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)
Lucindale (NCP03) 
 Vulnerable   (IUCN: EN B2ab(i,ii,iii))   (Definite Decline)
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Diuris]
Name derivation:
Diuris from the Greek 'di' meaning two and 'oura' meaning a tail; refering to the pendulous lateral sepals resembling tails on some species. Chryseopsis from the Greek 'chrysos' meaniong gold and 'opsis' meaning appearance; referring to the colour of the flowers.
Distribution:
Extinct in the Mt Lofty Ranges and found only between Naracoorte and Mount Gambier in South Australia, growing in damper grassy patches in woodland around waterholes along creeks, on cooler slopes, in rich, moist soils. Also found in New South Wales, Victoria and Tasmania.
Status:
Native. Rare in South Australia. Common in the other states.
Plant description:
Grows to 30 cm tall with up to 4 flowers. Leaves slender, grass-like. Flowers are compressed, bright yellow with fine brown streaks. Dorsal sepals are 15 mm long, lateral sepals to 20 mm long, petals spreading. Flowering between August and October.
Fruit type:
Brown papery ellipsoid capsule.
Seed type:
Very small brown ellipsoid seed with an oval translucent brown mesh-like covering.
Seed collecting:
Collect fat capsules as they start to dry and turn brown. Pods will split and release the seeds quickly and will require monitoring. To increase the chances of collecting mature pods, it is recommended that a small breathable bag (ie. Organza bags) be used to enclose the developing capsules.
Seed cleaning:
Place the capsules in a container that will hold fine seeds and leave to dry for a few weeks or until the capsule split. Then carefully hold the capsule and tap it gently to release the seeds. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place, refigerator or in liquid nitrogen.
Seed viability:
For the NVC South East Orchid Project a total of two populations consisting of more than X individuals in total were recorded from Topperwien and Wandilo. Approximately 205,000 seeds (0.22g) were banked for these two observed populations. Seed viability was 81% and 87%.