Gentiana bredboensis - endangered species listing

NSW Scientific Committee - final determination

The Scientific Committee, established by the Threatened Species Conservation Act, has made a Final Determination to list the herb, Gentiana bredboensis L. Adams as an ENDANGERED SPECIES in Part 1 of Schedule 1 of the Act, and as a consequence, to omit reference to Gentiana bredboensis L. Adams from Schedule 2 (Vulnerable species) of the Act. Listing of endangered species is provided for by Part 2 of the Act.

The Scientific Committee has found that:

1. Gentiana bredboensis L. Adams (family Gentianaceae) is described by S. W. L. Jacobs (1992) in Harden, G. (ed.). Flora of New South Wales. Vol. 3. UNSW Press. p. 512 as: Annual or possibly biennial herb 2-9 cm high, glabrous; stem usually many-branched, minutely scabrous; basal leafless portion very short. Basal leaves 3-6 pairs, sessile, broad-ovate, 8-20 mm long, 8-12 mm wide, margins smooth to minutely scabrous; cauline leaves 3-6 pairs, becoming smaller and thicker up stem, 6-15 mm long and 5-8 mm wide. Flowers 1-6 per plant. Calyx 5-8 mm long; ribs narrow-winged; lobes 2.5-3.5 mm long. Corolla 8-10 mm long, pinkish ribbed outside, pure white inside; lobes spreading, 2-4 mm long. Stipe elongating to 2.5 mm in fruit. Capsule oblong-ovoid, 5-6 mm long. Flowers recorded Dec.

2. Gentiana bredboensis is a NSW endemic currently known from only a single population in the Monaro Region on the southern tablelands. The single population supports less than 200 individuals and occupies a very restricted area.

3. No populations are known to occur within a conservation reserve, with the single known population occurring on private property.

4. A nearby subpopulation on an adjacent private property has disappeared in recent years.

5. Gentiana bredboensisis threatened by inappropriate disturbance regimes, habitat clearing, inappropriate grazing regime, fertiliser use and sowing of exotic pasture species. Given that the species is known only from a single location it is also threatened by demographic and environmental stochasticity.

6. In view of the above the Scientific Committee is of the opinion that Gentiana bredboensis L. Adams is likely to become extinct in nature in New South Wales unless the circumstances and factors threatening its survival or evolutionary development cease to operate.

Associate Professor Paul Adam
Scientific Committee

Proposed Gazettal date: 4/07/03
Exhibition period: 04/07/03 - 15/08/03

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Page last updated: 28 February 2011