Seeds of South Australia
Diuris brevifolia (Orchidaceae)
Short-leaved Donkey-orchid
List of species for Diuris
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Seed collecting:
November to January
Herbarium regions:
Southern Lofty, Kangaroo Island
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [endemic to SA; fire responsive sp; fluctuates]
Fleurieu (KAN02) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii,iv,v))   (Probable Decline)   [endemic to SA; Joe Q has done lots of survery work; fire responsive sp; fluctuates; habitat has been destroyed]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D)   (Probable Decline)   [endemic to SA; Joe Q has done lots of survery work; fire responsive sp; highly localised (Mt Bold pop); has declined from northern MLR; fluctuates]
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 drooping lateral sepals resembling tails, on some species. Brevifolia from the Latin 'brevis' meaning short and 'folium' meaning a leaf.
Endemic to South Australia and found on Kangaroo island and southern Mount Lofty Ranges growing on the edges of ephemeral swamps, river flats and valley and ridge slopes which are prone to waterlogging, in dense shrubland on moist to wet soils.
Native. Very rare in South Australia.
Plant description:
Terrestrial orchid to 40 cm high in flower. Leaves two to eight, short, narrow and twisted in an erect tuft. Inflorescence at the end of a slender, almost wiry stem with two to five, large, buttercup yellow flowers with a  few brown markings. Dorsal sepal to 11 mm long, recurved, with a dark-brown spot on each side of the lower surface near the base. Lateral sepals to 23 mm long, parallel or slightly recurved, green or green and brown. Petals to 14 mm long, on a brown stalk to 3 mm long, spreading; lamina elliptical, yellow. Labellum sessile, 3-lobed, trapezoid, yellow; at least as long as the dorsal sepal and usually longer. Flowering between November and December.
Fruit type:
Brown papery ellipsoid capsule.
Seed type:
Very small brown ellipsoid seed with a translucent brown mesh-like covering.
Seed collecting:
Collect plump 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 capsules 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.