Karst features including sinkholes.

Volcanic cones of Mount Gambier and Mount Schank.

Limestone sinkholes - Refugia for aquatic plants including Blechnum chambersii (lance water fern) and Pteris tremula (tender brake).

Basalt Midget Greenhood (Pterostylis sp aff mutica)

Inverleigh spider-orchid (Caladenis ap aff fragrantissima)

Lara Greenhood (Pterostylis sp aff biseta)

Dwarf Spider-orchid (Caladenia pumila R.S. Rogers)

Shelford Leek-orchid (Prasophyllum fosteri)

Sunshine Diuris (Diuris fragrantissima)

Woorndoo greenhood (Pterostylis sp aff bicolor)

Early Golden Moths (Diuris sp aff lanceolata (Derrinallum))

Basalt Greenhood (Pterostylis basaltica D.L. Jones & M.A. Clem.)

Short Sun-orchid (Thelymitra sp. aff. pauciflora (Laverton) sensu Ross (2000))

Cygnet Greenhood (Pterostylis sp aff cycnocephala)

Large-flower Cranesbill (Geranium sp. 1 sensu L.P. Smith (1999))

Basalt Sun-orchid (Thelymitra gregaria D.L. Jones & M.A. Clem.)

Small Golden Moths (Diuris sp. aff. lanceolata (Laverton) sensu Entwisle (1994))

Salt-lake Tussock-grass (Poa sallacustris N.G. Walsh)