Flowering plant 5–12 cm tall. Leaf 3–8 cm long, 7–9 mm wide, sometimes dotted purplish at the base. Flower usually 1, rarely 2; perianth segments 1.5–2.5 cm long, yellowish-green with red stripes; dorsal sepal linear to linear-lanceolate, 2–2.5 cm long, 2.5–3 mm wide, narrowed to a linear-involute section just before the osmophore; osmophore1.5–2.5 mm long with uncrowded sessile dark brown cells; lateral sepals oblong-lanceolate, 1.7–2.3 cm long, slightly falcate, more or less parallel or crossed, involute section terminated by an osmophore similar to that on the dorsal sepal; petals linear-lanceolate, 1.5–1.8 cm long, acuminate. Labellum curved forward, flattish to concave in middle region, cordate, 3-lobed, 9–12 mm long and 8–11 mm wide (when flattened), yellowish green with a recurved reddish mid-lobe; margins entire in basal portion, lateral lobes toothed towards mid-lobe, mid-lobe with 6–8 pairs of broad teeth; lamina calli in 4 irregular rows ending at the mid-lobe, foot-shaped, fleshy, reddish, c. 3 mm long at base of lamina, diminishing in size toward apex. Flowers Aug.–Oct.
VVP, Gold, HSF. Endemic to south-central Victoria where known from a few sites on ridges and sheltered slopes in open forests on shallow clay loams.
Caladenia amoena differs from C. toxochila in having lighter-coloured flowers, sepals with less prominent glandular tips, and labellum lamina calli thinner, dark reddish rather than blackish and only moderately congested.
Known only by a few small remnant populations on the outskirts of Melbourne and critically endangered.
