Indig. Flora & Fauna Assoc. Misc. Pap. 1: 16 (1991) APNI
Threat status:EPBC: endangered (EN); Victoria: extinct (x); listed in Flora and Fauna Guarantee Act 1988
Flowering plant 34 cm tall. Leaf 14 cm long, 9 mm wide. Flower solitary; perianth segments 2.5–3.5 cm long, white with reddish purple tinges, terminated by light purplish brown clubs, clubs on sepals c. 12 mm long, those on petals c. 2 mm long, glands sessile and crowded; lateral sepals and petals spreading, with decurved tips; sepals flattened at base, abruptly tapered to acuminate tails; petals shorter than sepals, flattened at base, tapered to acuminate tails. Labellum curved forward with apex recurved and lateral lobes erect, obscurely 3-lobed, c. 13 mm long and c. 10 mm wide (when flattened), white with pink marginal and lamina calli; margins of lateral lobes with numerous calli, to 2 mm long, decreasing in size towards the apex; lamina calli in 4 or 6 rows, extending onto mid-lobe, narrow, foot-shaped, c. 1.5 mm long at base of lamina, decreasing in size towards apex (measurements derived from the type specimen). Flowers Oct.
Found once only, near Mt Eliza, growing in Eucalyptus viminalis woodland.
Caladenia thysanochila was discovered during a vegetation survey in 1988 and has not been seen since. Only two plants were discovered, one of which became the type specimen. The species is assumed to be extinct.
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