Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Cycadaceae

Scientific Name: Cycas silvestris
Species Authority: K.D.Hill

Assessment Information [top]

Red List Category & Criteria: Vulnerable D2 ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Hill, K.D.
Reviewer(s): Donaldson, J.S. & Bösenberg, J.D.
The population appears to be stable at present.It is listed as Vulnerable under criterion D2 based on its very restricted occurrence at only three localities. The species does not occur in any protected area. The species would qualify for an Endangered listing under criterion B1 if there was any evidence of decline.
Previously published Red List assessments:
2003 Vulnerable (VU)
1998 Vulnerable (V)

Geographic Range [top]

Range Description: This species is known only from sub-coastal forests near the northeastern tip of Cape York Peninsula, Queensland, Australia. Populations are found near Temple Bay and to the north and south of the Olive River estuary.
Countries occurrence:
Australia (Queensland)
Number of Locations: 3
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The species is locally common with between 2,500 and 10,000 mature individuals.
Current Population Trend: Stable
Additional data:
Number of mature individuals: 2500-10000
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: Populations of C. silvestris occur on white siliceous sands from old beach-dunes, and this cycad appears to be endemic to that substrate. Grows in dry woodland.
Systems: Terrestrial
Generation Length (years): 40

Threats [top]

Major Threat(s): Threats to this species are unknown.

Conservation Actions [top]

Conservation Actions: This species is listed on Appendix II of the CITES Appendices.

Citation: Hill, K.D. 2010. Cycas silvestris. The IUCN Red List of Threatened Species 2010: e.T41960A10585196. . Downloaded on 08 October 2015.
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