Caladenia clavigera
A.Cunn. ex Lindl. Plain-lip Spider OrchidFlowering plant 15–40 cm tall. Leaf 5–20 cm long, 5–12 mm wide. Flowers 1 or 2; perianth segments 2.5–3.5 cm long, yellowish-green with a broad reddish central stripe; lateral sepals and petals spreading or deflexed, divergent; sepals flattened at base, 2–3.5 mm wide, tapered to a filiform, often clubbed apex (club 1–5 mm long, with blackish, contiguous, sessile glands); petals similar to sepals but shorter, without clubs. Labellum curved forwards, cordate, obscurely 3-lobed, 10–14 mm long and 8–10 mm wide (when flattened), whitish to greenish with dark red mid-lobe and central portion, lateral lobes more or less flattened but becoming recurved towards mid-lobe; margins usually entire; lamina calli in 4 or 6 rows, well separated, not extending onto mid-lobe, linear, bent. Flowers Sep.–Nov. (to Jan. in high country).
Wim, GleP, VVP, VRiv, GipP, OtP, Gold, CVU, GGr, DunT, NIS, EGL, EGU, WPro, HSF, HNF, Strz, MonT, VAlp. Also SA, NSW, Tas. Scattered across much of southern Victoria, less common north of the ranges, growing in woodland, open-forest, coastal scrub and heathland on well-drained soils.
Distinguished by its cordate labellum with lateral lobes not toothed and the mid-lobe margin not thickened. In spite of the specific epithet (meaning `bearing clubs'), the sepals of this species are not always clubbed.
Entwisle, T.J. (1994). Orchidaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 2, Ferns and Allied Plants, Conifers and Monocotyledons, pp. 740–901. Inkata Press, Melbourne.