Caladenia audasii R.S.Rogers

McIvor Spider Orchid

Trans. & Proc. Roy. Soc. South Australia 51: 295 (1927) APNI

Taxonomic status:Accepted

Occurrence status:Endemic

Establishment means:Native

Threat status:EPBC: endangered (EN); Victoria: endangered (e); listed in Flora and Fauna Guarantee Act 1988

Flowering plant 11–19 cm tall. Leaf c. 5–10 cm long and 6–10 mm wide. Flower solitary; perianth segments 3–6 cm long, yellowish, lateral sepals and petals spreading; sepals flattened at base, 4–5 mm wide, tapered to a filiform tail densely covered in glandular hairs; petals shorter than sepals, flattened at base, tapered to long acuminate apex covered in glandular hairs. Labellum curved forward with apex recurved and lateral lobes erect, lamina ovate, obscurely 3-lobed, c. 18 mm long and c. 10 mm wide (when flattened), yellowish; margins of lateral lobes entire or slightly scalloped, those of mid-lobe shortly and broadly toothed; lamina calli in 6 rows, short, extending just onto mid-lobe, narrow, almost sessile, c. 1.5 mm long at base of lamina, decreasing in size towards apex. Flowers Sep.–Nov.

DunT, Gold. Endemic to Victoria where known only from the west and central goldfields in woodland on shallow stony soils.

Differs from other spider orchids with yellow flowers in having glandular hairs rather than sessile glands on the perianth segments, labellum margins entire to shortly and broadly toothed, and flowering stem less than 20 cm tall.

Source: Entwisle, T.J. (1994). Orchidaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons. Inkata Press, Melbourne.
Updated by: Jeff Jeanes, 2015-04-17
Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Asparagales
family Orchidaceae
genus Caladenia
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Caladenia audasii in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Caladenia audasii in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Goldfields present native
Dundas Tablelands present native

State distribution

Distribution map
South Australia