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Synonyms: Corunastylis sp. Charmhaven (NSW896673) APNI*

Description: Terrestrial tuberous herb.

Leaf 19.5 cm long, 1.8 mm wide, slender, terete, [colour mostly unknown]; lamina 16 mm long (measured from base of terete part; 25 mm from tip to base of slit), 1.4 mm wide, linear-lanceolate, sheathing the scape, ending 8.5 mm above base of the first flower.

Flowers c. 8.5 mm between tip of dorsal sepal and tips of lateral sepals, 6 mm between tips of lateral petals, green and cream with deep maroon markings, semi-erect to erect. Ovary 2.7–3.8 mm long, ellipsoidal, curved. Dorsal sepal 4.0–4.5 mm long, 2.0–2.1 mm wide, ovate, cucullate, glabrous, greenish cream, with 3 maroon veins and maroon margins. Lateral sepals 5.0–5.5 mm long, 1.3–1.4 mm wide, narrow-ovate, bent abaxially c. 1 mm above base through 45º -100º, erect to ascending, slightly to prominently divergent, distally involute, green with heavy reddish suffusion in basal 1/2 to 2/3, glabrous. Lateral petals 3.5–3.7 mm long, 1.0–1.2 mm wide, narrow-ovate, acute or shortly acuminate, divergent, cream with 3 maroon veins and maroon margins, with sparsely ciliate margins; cilia mostly less than 0.1 mm long. Labellum 3.2 mm long, 1.5 mm wide, obovate, rounded distally, with recurved, mucronate apex, maroon, narrowed in proximal 2/3, thick and fleshy, the margins densely cilaite [sic] with trichomes varying in length from < 0.1 mm long to 1.0 mm long; callus extending almost to labellum apex, deeply channelled for basal 2/3 of its length, widest (0.7 mm just below the middle, thickest in the basl [sic] half. Column 2.2 mm long, erect, with two proiminent [sic] basal callosities; foot c. 0.5 mm long, projected forwards, curved upwards. Column wings finely scabrous, notched in distal 1/5 to 1/6, oblong-obovate in outline, with lobes not divergent, both acuminate. Anther 1.0 mm long, truncate. Stigma broad-elliptical, 0.8 mm long, 0.7 mm wide. Pollinarium 1.0 mm long; pollinia 0.45 mm long, yellow [sic], granular; hamulus 0.45 mm long; viscidium 0.3 mm wide.

Habitat Photo Brian Towle

Habit Photo Brian Towle

Distribution and occurrence: Currently only known from the Wyong Shire of NSW.

Occurs within low woodland to heathland with a shrubby understorey and ground layer. Dominants include Allocasuarina littoralis, Leptospermum juniperinum, Melaleuca nodosa, Callistemon linearis and Schoenus brevifolius.
NSW subdivisions: CC

Threatened species: NSW BCA: Critically Endangered; Commonwealth EPBC: Critically Endangered

AVH map***

Genoplesium sp. Charmhaven (NSW896673) is similar to Genoplesium archeri (syn. Corunastylis archeri) but differs from G. archeri in having fewer, larger flowers (6-9 flowers, 6 mm across, versus 10-20 flowers, 4.5–5 mm across in G. archeri), borne on a shorter inflorescence (1.4 cm long versus 2–3.5 cm long in G. archeri). Genoplesium sp. Charmhaven (NSW896673) is also similar to G. stephensonii.