Seeds of South Australia
Caladenia calcicola (Orchidaceae)
Eastern Limestone Spider-orchid
List of species for Caladenia
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Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Mount Gambier (SVP02)Southern Volcanic Plain
 Critically Endangered   (IUCN: CR B1ab(i,ii,iii))   (Definite Decline)   [edge of range, more in Vic; some taxonomic issues]
Lucindale (NCP03)Naracoorte Coastal Plain
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [In Padthaway CP; some taxonomic issues]
Tintinara (NCP04) 
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [Arberdour CP; some taxonomic issues]
Lowan Mallee (MDD04)Murray Darling Depression
 Endangered   (IUCN: EN D)   (Definite Decline)   [no records - C. Aff reticulata, not yet databased; no viable pops, could be C calcicola]
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. Calcicola from the Latin 'calx' meaning lime and 'colo', to inhabit.
Found in the south-east of South Australia. Also in south-western Victoria. Grows in shallow, sandy soil on limestone ridges in heathy woodland.
Native. Endangered in South Australia. Vulnerable in Australia.
Plant description:
Erect terrestrial orchid to 28 cm tall in flower, with a flowering stem which bears one or 2 flowers. A single, lanceolate leaf up to 15 cm long with dense hairs on both laminae. Flowers are up to 40cm wide. Both sepals and petals are pale yellow, glossy with variable reddish stripes. Sepals have prominent yellow to red clubs and the maroon labellum has glossy, crowded calli. Flowering September to 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, refigerator or in liquid nitrogen.