Cycas macrocarpa 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Cycadopsida Cycadales Cycadaceae

Scientific Name: Cycas macrocarpa
Species Authority: Griff.

Assessment Information [top]

Red List Category & Criteria: Vulnerable A2c ver 3.1
Year Published: 2010
Date Assessed: 2009-10-31
Assessor(s): Hill, K.D.
Reviewer(s): Donaldson, J.S. & Bösenberg, J.D.
Although it still occurs in relatively large numbers in the ridge forests of southern Thailand, it is estimated that the area of occupancy decreased by >30% over the past 50 years due to expanding agriculture and it therefore qualifies for listing as Vulnerable.
Previously published Red List assessments:
2003 Vulnerable (VU)

Geographic Range [top]

Range Description: This species occurs in southern Thailand, as well as in northern and central peninsular Malaysia. In Thailand plants occur near the Malaysian border, with disjunct occurrences in Prachuap Khiri Khan province in the northern peninsula. This species is more common in Malaysia.
Countries occurrence:
Malaysia (Peninsular Malaysia); Thailand
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: A widely scattered species, not forming dense stands.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 10000
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: These cycads originally occurred in primary low elevation closed forest (rainforest), on well-drained, often sloping, deep sandy clay-loam soils, and are said to still occur on the less disturbed ridges.
Systems: Terrestrial
Generation Length (years): 40

Threats [top]

Major Threat(s): This species has suffered extensive habitat destruction for agriculture and it is still ongoing.

Conservation Actions [top]

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

Citation: Hill, K.D. 2010. Cycas macrocarpa. The IUCN Red List of Threatened Species 2010: e.T42057A10640751. . Downloaded on 30 November 2015.
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