Caladenia calcicola G.W.Carr

Limestone Spider-orchid

Muelleria 6: 185 (1986) 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 11–22 (rarely to 28) cm tall. Leaf 5–13 cm long, 4–15 mm wide. Flowers solitary (rarely 2); perianth segments 1.5–4 cm long, pale yellow with red median stripe; lateral sepals divergent, deflexed, flattened at base, 2–4 mm wide, tapered to a filiform, clubbed tail, club linear, 2–9 mm long, with yellowish to reddish-purple, contiguous, sessile glands; petals spreading to deflexed, shorter than sepals, flattened at base, tapered to a long acuminate apex. Labellum curved forward with apex recurved and lateral lobes erect, lamina ovate to obtrullate, more or less 3-lobed, 8–15 mm long and 7–11 mm wide (when flattened), glossy and waxen, red at least distally, proximal half paler red or yellowish-cream, with red veins; marginal calli on lateral lobes irregularly triangular to linear, to 1 mm long, diminishing in size towards the (usually) entire or slightly irregular mid-lobe; lamina calli in 4 (rarely 6) rows, more or less crowded, not reaching bend, stout and flat-topped, to 2.5 mm long at base of lamina, decreasing in size towards apex. Flowers Sep.–Oct.

Brid, Glep, VVP. Also SA. Restricted to a few localities west of Portland and just extending into S.A., growing on low ridges overlying limestone.

Differs from other members of the C. reticulata complex in having a glossy, waxen labellum with more or less congested, stout, flat-topped lamina calli and shorter (not more than 1 mm long) marginal calli.

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, 2015-04-21
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 calcicola in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Caladenia calcicola in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Glenelg Plain present native
Bridgewater present native
Victorian Volcanic Plain present native

State distribution

Distribution map
South Australia