Seeds of South Australia
Diuris orientis (Orchidaceae)
Wallflower Donkey Orchid
List of species for Diuris
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Seed collecting:
November to January
Herbarium regions:
Eyre Peninsula, Northern Lofty, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South East
IBRA regions
SUMMARY
Mount Gambier (SVP02)Southern Volcanic Plain
 Rare   (IUCN: RA d(i,ii))
Bridgewater (NCP01)Naracoorte Coastal Plain
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Glenelg Plain (NCP02) 
 Near Threatened   (Probable Decline)
Lucindale (NCP03) 
 Least Concern
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [too dry]
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Least Concern
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern
Broughton (FLB02) 
 Critically Endangered   (IUCN: CR D)   (Definite Decline)   [One population, less than 50 plants. Very few flowering plants. Declining.]
Southern Yorke (EYB01)Eyre Yorke Block
 Least Concern   (Probable Decline)   [Declining]
Eyre Hills (EYB03) 
 Near Threatened   (Probable Decline)
Talia (EYB04) 
 Near Threatened   (Probable Decline)
Eyre Mallee (EYB05) 
 Rare   (IUCN: RA d(ii))
Murray Mallee (MDD02)Murray Darling Depression
 Rare   (IUCN: RA d(ii))
Murray Lakes and Coorong (MDD03) 
 Vulnerable   (IUCN: VU D1+2)   (Definite Decline)   [no records, but occurs here; drying a threat]
IBRA regions
DISPLAY ALL
Mount Gambier (SVP02)Southern Volcanic PlainRare
  (IUCN: RA d(i,ii))
4 of 4 subregionsNaracoorte Coastal PlainLeast Concern
, Near Threatened
, Rare
2 of 2 subregionsKanmantooLeast Concern
2 of 6 subregionsFlinders Lofty BlockLeast Concern
, Critically Endangered
4 of 5 subregionsEyre Yorke BlockLeast Concern
, Near Threatened
, Rare
2 of 6 subregionsMurray Darling DepressionRare
, Vulnerable
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 'dis' meaning two and 'oura' meaning a tail; referring to the pendulous lateral sepals resembling tails on some species. Orientis from Latin meaning eastern; a reference to the distribution of this species, the only eastern representative of a large complex of otherwise Western Australian donkey orchids.
Distribution:
Found in the southern part of South Australia, from the bottom of Eyre Peninsula to the lower-South-east, growing among grass in sclerophyll forest. Also found in New South Wales, Victoria and Tasmania.
Status:
Native. Common in South Australia. Rare in New South Wales. Common in the other states.
Plant description:
Terrestrial orchid to 40 cm high in flower, with 2 or 3 leaves which are linear to lanceolate, to 20 cm long and10 mm wide. Inflorescence one to five, yellow heavily suffused with brown and mauve flowers. Dorsal sepal broad-ovate to cuneate, to 13 mm long and 14 mm wide, obliquely erect. Lateral sepals oblanceolate, to 23 mm long and 4 mm wide, deflexed, parallel. Petals divergent, erect or recurved, lamina ovate, to 17 mm long and 12 mm wide, claw 5–7 mm long, greenish brown. Labellum to 14 mm long. Flowering between September and November.
Fruit type:
Brown papery ellipsoid capsule.
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, refrigerator or in liquid nitrogen.