Caladenia australis (Caladenia australis)
Description
Caladenia australis is a terrestrial, perennial, deciduous, herb with an underground tuber and a single hairy leaf, 5–17 cm (2–7 in) long and 4–11 mm (0.2–0.4 in) wide. There is usually only a single flower on a thin, wiry, sparsely hairy spike 12–30 cm (5–10 in) high, each flower 50–60 mm (2.0–2.4 in) wide. The dorsal sepal curves forward or droops over the rest of the flower. All three sepals are 20–60 mm (0.8–2 in) long, 2–4 mm (0.08–0.2 in) wide and taper to a thin end with dark red, club-like glands. The petals are a similar size and shape to the sepals but lack glandular ends. The petal and sepals spread widely, sometimes drooping near their ends and are a creamy-yellow colour, often with red streaks. The labellum is shiny, yellowish with a maroon tip and curves forward, with the tip rolled under at the end. It is egg-shaped, 12–15 mm (0.5–0.6 in) long and about 3 mm (0.1 in) wide. The edges of the labellum have many teeth up to 2 mm (0.08 in) long and there are 4 to 6 rows of dark red calli along the labellum mid-line, decreasing in size towards the front. Flowering occurs between September and November and is strongly enhanced by fires the previous summer.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Liliopsida
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Order: Asparagales
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Family: Orchidaceae
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Genus: Caladenia
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