Wyong Sun Orchid - profile

Indicative distribution


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Key:
known
predicted
The areas shown in pink and/purple are the sub-regions where the species or community is known or predicted to occur. They may not occur thoughout the sub-region but may be restricted to certain areas. ( click here to see geographic restrictions). The information presented in this map is only indicative and may contain errors and omissions.
Scientific name: Thelymitra adorata
Conservation status in NSW: Critically Endangered
Commonwealth status: Critically Endangered
Gazetted date: 10 Jun 2016
Profile last updated: 01 Dec 2017

Description

A ground orchid up to 60 cm tall with a single leaf. The leaf is 10-40 cm long, 5-20 mm wide, erect or drooping, fleshy, ribbed on the back, green with a purplish base, and sheathes the flowering stem at the base. The flowering stem, which usually emerges in September, is dark bluish-purple and 20-60 cm tall by 2-5 mm diam. Flowers are fragrant, 2-13 in number, and borne on slender stalks 1-14 mm long. Individual flowers are 15-27 mm across, pale to dark blue and only open in warm, sunny weather. The dark, thick, rigidly erect stems aid field recognition, as compared to other Thelymitra species in the area, even when the flowers are closed. The species is currently listed by the Commonwealth as Thelymitra adorata.

Distribution

Currently known from a few localised occurrences in the area bounded by the towns of Wyong, Warnervale and Wyongah on the New South Wales Central Coast, within the Wyong Local Government Area.

Habitat and ecology

  • Occurs from 10-40 m a.s.l. in grassy woodland or occasionally derived grassland in well-drained clay loam or shale derived soils. The vegetation type in which the majority of populations occur (including the largest colony) is a Spotted Gum - Ironbark Forest with a diverse grassy understorey and occasional scattered shrubs.
  • Some reports suggest that the species may also occur within the margin of two other vegetation types where these adjoin or constitute portions of the remnant vegetation areas in which the orchid has been recorded. Alluvial Redgum Footslopes Forest (Bell 2002) adjoins Dooralong Spotted Gum - Ironbark Forest at one population, and may constitute habitat for the species. Alluvial Floodplain Shrub Swamp Forest (Bell 2002) also adjoins Dooralong Spotted Gum - Ironbark Forest at one extant population with a report of a small orchid colony on the margin (B. Branwhite pers. comm.), and one apparently extinct population occurred in vegetation probably assignable to this type near Warnervale.
  • A number of sites where the species occurs are subject to past and ongoing disturbance, including sites on the edges of roads that contain a mixture of native and introduced species in the understorey, though competition with invasive introduced species is a threat.

Regional distribution and habitat

Click on a region below to view detailed distribution, habitat and vegetation information.


Threats

Recovery strategies

Activities to assist this species

Information sources

IBRA Bioregion IBRA Subregion Known or predicted Geographic restrictions region
Sydney BasinWyong Known None