Thelymitra decora Cheeseman
Original localities: "Summit of Mount Kakaramea, Taupo, and hills near the base of Ngauruhoe, alt. 3,000–5,000 ft., T.F.C." Lectotype: AK 3361, summit of Mt. Kakaramea.
Plant at fl. to 50 cm. tall. Lf to 10 mm. wide, channelled, ± distinctly keeled. Infl. to c. 10-fld. Per. c. 15 mm. long, lavender-blue with darker spots, especially on petals. Sepals and petals ovate-oblong, subacute, ± concave giving rounded appearance to fl. Labellum slightly spathulate. Column-arms terete to plano-convex in T.S.; cilia very ∞, white, arising from sides, back and top of arm and mostly standing higher than post-anther lobe; post-anther lobe narrow compared with maximum width of column, extending well above anther-tip, dark and tuberculate above the middle, margin us. yellow, finely denticulate, inclined to bend over anther though not thickened or incurved.
DIST.: N., S., Marlborough-Nelson coast.
Clay banks.
FL. (10)–12–1.
Recorded only in N.Z. but in Tasmania and Victoria an apparently similar plant is described under the name T. truncata Rogers in Trans. roy. Soc. S. Aust. 41, 1917, 343.