Seeds of South Australia
Caladenia venusta (Orchidaceae)
White Spider-orchid
List of species for Caladenia
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Seed collecting:
January to February
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [could be extinct]
Glenelg Plain (NCP02)Naracoorte Coastal Plain
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)
Lucindale (NCP03) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Probable Decline)   [localised]
Wimmera (MDD05)Murray Darling Depression
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable 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 Caladenia]
Name derivation:
Caladenia from the Greek 'callos' meaning beauty and 'aden' meaning a gland; referring to the colourful labellum and the glistening glands at the base of the column that adorn many of the species. Venusta from the Greek 'venusta' meaning attractive, graceful.
Distribution:
Found in th lower South-east in South Australia, growing in damp heathland, open forest and woodland. Also found in Victoria.
Status:
Native. Very rare in South Australia. Rare in Victoria.
Plant description:
Grows to 60 cm tall with one or two large flowers. A single basal leaf. Flowers are white to pale pink with a toothed labellum, which has a red margin and red calli. Tepals are 12 cm long. Flowering between September and November.
Fruit type:
Brown papery ellipsoid capsule.
Seed type:
Very small brown ellipsoid seed with a long 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 or in liquid nitrogen.
Seed viability:
For the NVC South East Orchid Project a total of three populations consisting of more than X individuals in total were recorded from the X, Nangwarry and Bolara Native Forest Reserves . Approximately 1,020,000 seeds (0.65g) were banked for these three observed populations. The seed viability for the collection made from X was very low at 8%. The other collections were higher at 49% and 65%.