The name Prasophyllum correctum D. L. Jones replaces P. chasmogamum R. Bates & D. L. Jones, the latter being based on an incorrect selection of a type. Prasophyllum chasmogamum R. Bates & D. L. Jones was described from material collected beside the railway line about 6 km west of Bairnsdale, Victoria, Australia (Jones, 1991), but the wrong specimen was inadvertently designated as the type. Collectors familiar with the orchid flora of the railway line west of Bairnsdale have pointed out that the taxon intended to be described did not occur in the locality, whereas two other species of Prasophyllum, namely P. pyriforme E. Coleman and P. frenchii F. Mueller, were present (J. Jeanes, pers. comm.; R. Clark, pers. comm.). A critical examination of the type of P. chasmogamum showed it to be identical with material of P. pyriforme. Thus P. chasmogamum becomes a synonym of P. pyriforme, and the overlooked taxon is here described as new. Prasophyllum pyriforme E. Coleman, Victorian Naturalist 49: 195, t. 14. 1932. TYPE: Australia. Wonga Park, Doncaster, Oct. 1931, F. Bullock s.n. (holotype, MEL). Prasophyllum chasmogamum R. Bates & D. L. Jones in D. L. Jones, Austral. Orchid Res. 2: 77. 1991. TYPE: Australia. About 6 km W of Bairnsdale, beside railway line, 5 Nov. 1969, T. B. lMuir 4765 (holotype, MEL). Prasophyllum correctum D. L. Jones, sp. nov. TYPE: Australia. Victoria: near Munro, 5 Nov. 1992, J. Jeanes (D. L. Jones 10689), (holotype, MEL; isotype, CBG). Figure 1. Prasophyllum fusco R. Brown affinis, sed floribus late aperientibus columna exposita, labello late ovato-lanceolato basi latissimo disciforme, et calli aliquantum irregulariter marginato differt. Slender terrestrial tuberous herb 15-40 cm tall. Tuberoids ovoid, 6-10 mm across. Leaf 12-30 cm long, dark green, base 3-5 mm across, red to purple, free lamina suberect, often withered at anthesis. Floral bracts ovate, ca. 4 x 2 mm, apiculate. Ovary NOVON 4: 106-108. 1994. obovoid, ca. 4 x 2 mm, shiny green, set at ca. 30? to the rhachis. Inflorescence a narrow loose spike 5-10 cm long, consisting of 10-20 flowers. Flowers 7-9 mm across, predominantly yellowish green and light reddish brown, opening widely, fragrant, sessile. Dorsal sepal linear-ovate, 7-9 x ca. 3 mm, green with brown striae, nearly vertical, subacute to acuminate. Lateral sepals linear-lanceolate, 7-9 x 1.52 mm, connate throughout, partially united or free from the base, erect or recurved, subacute, anterior margins involute throughout. Petals linear to linearlanceolate, 7-9 x 1-1.2 mm, green with brown striae, upswept, incurved to widely spreading, subacute. Labellum broadly ovate-lanceolate in outline when flattened, 6-8 x 3.5-4 mm, yellowish green, erect, narrowed to a short basal claw, not gibbous when viewed from the side, proximal half almost orbicular, obliquely erect, flat with entire margins, distal half recurved, with entire or slightly crenulate margins, the apex touching the sepals or protruding through them, apiculate; callus elliptical-lanceolate, 5-6 x 2-2.5 mm, raised, fleshy, green, channeled centrally, margins entire or crenate, narrowed beyond the bend and extending nearly to the labellum apex. Column ca. 3 x 3 mm, porrect from the end of the ovary, exposed by the wide expansion of the tepals; appendages linear-oblong, ca. 2.3 x 0.7 mm, pale green, truncate or emarginate. Anther ovate, ca. 2 x 1.6 mm, dark red brown. Pollinarium ca. 2 mm long; viscidium ovate, ca. 0.25 mm long, white; hamulus ca. 0.2 mm long, ligulate; pollinia linear-clavoid, ca. 1.6 mm long, yellow, sectile. Stigma quadrate, ca. 1.5 x 1.5 mm, the rostellum about as high as the appendages. Capsule obovoid, ca. 5 x 3 mm, shiny green. Flowering period. October and November. Distribution and habitat. Apparently endemic in grassland and woodland in southeastern Victoria, Australia, particularly around Bairnsdale, and with an old record from Marlo. The species is now confined to small areas in railway reserves, growing in grassland dominated by Themeda australis. Soils are mainly gray-brown clay loams. Notes. Prasophyllum correctum can be readily distinguished from its congeners, particularly P. fusThis content downloaded from 207.46.13.112 on Mon, 03 Oct 2016 05:01:12 UTC All use subject to http://about.jstor.org/terms Volume 4, Number 2 1994 Jones Prasophyllum correctum