Caley's Grevillea - 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: Grevillea caleyi
Conservation status in NSW: Critically Endangered
Commonwealth status: Critically Endangered
Gazetted date: 30 May 2014
Profile last updated: 24 May 2018

Description

A medium to tall shrub, with long spreading branches, which grows to a height and width of up to 4 m. The divided green leaves are covered in soft, rusty hairs and are up to 15 cm long. The flowers, which open in late winter and spring, have a toothbrush-like appearance with racemes up to 8 cm in length and are dark burgundy-red in colour.

Distribution

Restricted to an 8 km square area around Terrey Hills, approximately 20 km north of Sydney. Occurs in three major areas of suitable habitat, namely Belrose, Ingleside and Terrey Hills/Duffys Forest within the Ku-ring-gai, Pittwater and Warringah Local Government Areas.

Habitat and ecology

  • All natural remnant sites occur within a habitat that is both characteristic and consistent between sites.
  • All sites occur on the ridgetop between elevations of 170 to 240m asl, in association with laterite soils and a vegetation community of open forest, generally dominated by Eucalyptus sieberi and E. gummifera.
  • Commonly found in the endangered Duffys Forest ecological community.
  • Killed by fire and relies entirely on seed that is stored in the soil for regeneration.
  • Generally seedlings do not flower and produce seed before 2-5 years of age. Flowering is sporadic throughout the year, but with a definite spring pulse.
  • Fecundity is low with only about 3% of flowers result in seed. Seed dispersal is low and predation is high, therefore it is estimated that 8-12 years is required to develop a sufficient seedbank to replace a population.
  • Seed dormancy mechanisms are not fully understood, however it is thought that smoke and perhaps heat may play a role in breaking dormancy.
  • Pollination is by birds although it is thought that this species may be self compatible.

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 BasinPittwater Known 8km grid around Terrey Hills