Caladenia sigmoidea
species of plant
Caladenia sigmoidea, commonly known as the sigmoid spider orchid, is a species of orchid endemic to the south-west of Western Australia. It has a single erect, hairy leaf and usually only one red and cream-coloured flowers with an unusual S-shaped labellum.
Description
Caladenia sigmoidea is a terrestrial, perennial, deciduous, herb with an underground tuber and a single erect, hairy leaf, 70–120 mm (3–5 in) long and about 3 mm (0.1 in) wide. Usually only one red and cream-coloured flower, 30–40 mm (1–2 in) long and 20–30 mm (0.8–1 in) wide is borne on a stalk 50–150 mm (2–6 in) tall. The sepals and petals have thick, brown, club-like glandular tips 4–6 mm (0.16–0.24 in) long. The dorsal sepal is erect, 15–20 mm (0.6–0.8 in) long and about 1 mm (0.04 in) wide. The lateral sepals are 15–20 mm (0.6–0.8 in) long and about 2 mm (0.08 in) wide and curve stiffly downwards. The petals are 15–20 mm (0.6–0.8 in) long, about 1 mm (0.04 in) wide and curve stiffly upwards. The labellum is 8–10 mm (0.3–0.4 in) long, 5–6 mm (0.2–0.2 in) wide and creamy white with red stripes. The sides of the labellum have up to six short teeth on each side and there are two rows of red, anvil-shaped calli along its mid-line.
“Caladenia sigmoidea” enters the record as species of plant. Crown Archives preserves that source wording while asking what Caladenia, sigmoidea and species can confirm, complicate or overturn.
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“Caladenia sigmoidea” is worth following because a concise public description often conceals a longer documentary argument. Here, Caladenia, sigmoidea and species provides the most credible route into that argument.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jun 15, 2026. The linked authority identifier is Q9673958. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Caladenia sigmoidea” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.