Seeds of South Australia
Diuris pardina (Orchidaceae)
Common Donkey-orchid
List of species for Diuris
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Seed collecting:
November to December
Herbarium regions:
Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Northern and Yorke, South Australian Murray-Darling Basin, South East
IBRA regions
SUMMARY
Bridgewater (NCP01)Naracoorte Coastal Plain
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [listed as D pardina records]
Glenelg Plain (NCP02) 
 Endangered   (IUCN: EN D)   (Probable Decline)   [(no records) ]
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [highly localised, undercollected , records not databased]
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))   [all records but Mt Boothby are prob D brevissima]
Fleurieu (KAN02)Kanmantoo
 Near Threatened   [higher rainfall sp; sensitive to drought]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern   [higher rainfall sp; sensitive to drought]
Broughton (FLB02) 
 Vulnerable   (IUCN: VU C2a(i))   (Definite Decline)   [Two subpopulations, definite decline.]
Southern Yorke (EYB01)Eyre Yorke Block
 Critically Endangered   (IUCN: CR D)   (Definite Decline)   [Last recorded in 1994, 2 subpops recorded. Definite decline.]
St Vincent (EYB02) 
 Regionally Extinct   [Regionally Extinct.]
Eyre Hills (EYB03) 
 Least Concern
Talia (EYB04) 
 Least Concern
Eyre Mallee (EYB05) 
 Least Concern
Murray Mallee (MDD02)Murray Darling Depression
 Least Concern   (Probable Decline)   [records missing]
Murray Lakes and Coorong (MDD03) 
 Rare   (IUCN: RA d(i,ii))   [edge of range]
Lowan Mallee (MDD04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)
Wimmera (MDD05) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [listed as D pardina records]
IBRA regions
DISPLAY ALL
4 of 4 subregionsNaracoorte Coastal PlainRare
, Vulnerable
, Endangered
Fleurieu (KAN02)KanmantooNear Threatened
  [higher rainfall sp; sensitive to drought]
2 of 6 subregionsFlinders Lofty BlockLeast Concern
, Vulnerable
5 of 5 subregionsEyre Yorke BlockLeast Concern
, Critically Endangered
, Regionally Extinct
4 of 6 subregionsMurray Darling DepressionLeast Concern
, Rare
, Endangered
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 double and 'oura' meaning a tail; referring to the pendulous lateral sepals resembling tails on some species. Pardina from the Latin 'pardus' meaning leopard; referring to its flowers with spots like a leopard.
Distribution:
Found on the lower Eyre Peninsula, Yorke Peninsula, southern Flinders Ranges, Mount Lofty Ranges and the South-east in South Australia, growing in heathlands or drier open-forests. Also found in Victoria and Tasmania.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Terrestrial orchid to 40 cm tall in flower. Leaves 2 or 3, to 30 cm long, linear, channelled. Inflorescence on slender stem with 2–10, orange-yellow flowers (heavily blotched with dark brown). Pedicel to 3 cm long, slender, partly enclosed within tapered bract. Dorsal sepal obliquely erect, ovate, to 12 mm long, apex often recurved. Lateral sepals deflexed, recurved, parallel usually strongly crossed, sickle-shaped, to 18 mm long, green with darker markings. Petals obliquely erect to recurved, to 20 mm long, claw to 7 mm long, blackish, lamina ovate, usually heavily blotched on outer surface. Labellum projected forward, to 7 mm long, 3-lobed with lateral lobes about as long as mid-lobe, oblong,  mid-lobe wedge-shaped, strongly folded. Flowering between August and October.
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.