Seeds of South Australia
Corybas diemenicus (Orchidaceae)
Veined Helmet-orchid
List of species for Corybas
Display more images
Click on an image to enlarge it
Seed collecting:
October to November
Herbarium regions:
Northern Lofty, Murray, Southern Lofty, Kangaroo Island, South Eastern
NRM regions:
Adelaide and Mount Lofty Ranges, Kangaroo Island, South Australian Murray-Darling Basin, South East
IBRA regions
Bridgewater (NCP01)Naracoorte Coastal Plain
 Least Concern   [See C dilatatus (NC). The Pic Ponds records are C silky ti-tree swamps & C sp Picannanine Ponds]
Glenelg Plain (NCP02) 
 Least Concern   [no records, should be records]
Lucindale (NCP03) 
 Near Threatened   (Probable Decline)   [no records]
Tintinara (NCP04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [no records, edge of range]
Kangaroo Island (KAN01)Kanmantoo
 Rare   (IUCN: RA d(ii))   [(no records) 3 records on KI; clonal sp]
Fleurieu (KAN02) 
 Least Concern   [clonal sp]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Least Concern   [clonal sp]
Broughton (FLB02) 
 Critically Endangered   (IUCN: CR B1ab(i,iii,v))   (Definite Decline)   [Changed name in electronic census to C.dilatatus. One clonal population]
Lowan Mallee (MDD04)Murray Darling Depression
 Critically Endangered   (IUCN: CR C2a(i); D)   (Definite Decline)   [no records, not yet databased; 1 colony in Geegeela]
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 Corybas]
Name derivation:
Corybas from the Greek 'korybas' one of the dancing priests of the goddess Cybele in Phrygia, or a drunken man, an allusion perhaps to the flower’s resemblance to the priest’s head-dress, or to the stoop of a drunken man. Diemenicus refers to Van Diemen's Land the old name for Tasmania from where the plant was originally collected.
Distribution:
Found from near Clare to the South-east and Kangaroo Island in South Australia, mostly in high rainfall areas. Also found in New South Wales, Victoria and Tasmania.
Status:
Native. Common in South Australia. Common in the other states.
Plant description:
Grows to 20mm high with a single flower. Single basal leaf, rounded to cordate, ground hugging, to 25 mm by 20 mm, green. Flower 15mm across, dorsal sepal ovate, maroon and hooding the labellum, labellum translucent with maroon veins and flared coarsely toothed margins. Flowering between July and August.
Fruit type:
Brown papery ellipsoid capsule.
Seed type:
Very small yellow brown ellipsoid seed with a long cylindrical 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, a refrigerator or in liquid nitrogen.
Seed viability:
For the NVC South East Orchid Project one population consisting of more than X individuals were recorded at Pick Swamp. Approximately 4000 seeds (0.004g) were banked for this populations. Seed viability was 87%.