Sand-hill Spider Orchid - profile

Indicative distribution


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Key:
known
predicted
The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Caladenia arenaria
Conservation status in NSW: Endangered
Commonwealth status: Endangered
Gazetted date: 18 Jul 1997
Profile last updated: 01 Dec 2017

Description

Sand-hill Spider Orchid is from a group of orchids characterised by five long, spreading petals and sepals around a broad down-curled labellum (‘lip’). Its densely hairy leaves are reddish at the base, up to 10 cm long and 6 mm wide. The flower stalk is up to 40 cm tall and has 1 or 2 pale yellow flowers. The petals and lateral sepals are stiffly spread into a cross shape; the tips of all are red and hairy. The labellum is only 8 mm across when flattened out and without lobes; this combination of flower characters is unique. The flowers appear between September and November.

Distribution

Caladenia arenaria is found mostly on the south west plains and western south west slopes. The original description is of a plant from Nangus, west of Gundagai (1865) and there is a report of the species from Adelong near Tumut. A record near Cootamundra needs verifying. The Sand-hill Spider Orchid is currently only known to occur in the Riverina between Urana and Narranderra.

Habitat and ecology

  • Occurs in woodland with sandy soil, especially that dominated by White Cypress Pine (Callitris glaucophylla).

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Threats

Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
NSW South Western SlopesInland Slopes Known None
NSW South Western SlopesLower Slopes Known west of Lockhart and north of Rand
Other StateSA Known None
RiverinaMurrumbidgee Known east of Jerilderie