Caladenia concolor W.Fitzg.

Crimson Spider-orchid

Austral. Orch. 1 (7): t. 8 (1882) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

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

Flowering plant 15–25 cm tall. Leaf 8–15 cm long, 8–10 mm wide. Flowers 1 or 2; perianth segments 2.5–4 cm long, dark purplish-red to crimson; sepals flattened at base, 2–3 mm wide, gradually tapered to a long tail, densely covered in crowded, ovoid to ellipsoid glands; petals shorter than sepals but otherwise similar. Labellum curved forward with apex recurved and lateral lobes erect, lamina ovate to broadly ovate-lanceolate, obscurely 3-lobed, 11–13 mm long, 8–10 mm wide (when flattened), dark purplish-red; margins of lateral lobes fringed with linear calli to 1 mm long; margins of mid-lobe with shorter calli becoming fused towards tip; lamina calli in 4 crowded rows, the central rows extending well onto mid-lobe, narrow, foot-shaped, c. 2 mm long at base of lamina, decreasing in size towards apex. Flowers Sep.–Oct.

CVU, Gold, HNF, HSF, NIS, VAlp, VRiv, VVP. Also SA, NSW. Sporadic and uncommon in dry open-forests, mostly of north-eastern Victoria, on ridges and slopes in well-drained shallow stony or skeletal soils.

Characterized by its wholly purplish-red flowers. Has been confused with other similar taxa: see Caladenia clavescens and C. formosa.

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: Val Stajsic, 2018-02-15
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 concolor in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Caladenia concolor in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Volcanic Plain present native
Victorian Riverina present native
Goldfields present native
Central Victorian Uplands present native
Northern Inland Slopes present native
Highlands-Southern Fall present native
Highlands-Northern Fall present native
Victorian Alps present native

State distribution

Distribution map
South Australia
New South Wales