Juniper-leaved Grevillea - profile

Indicative distribution


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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 juniperina subsp. juniperina
Conservation status in NSW: Vulnerable
Commonwealth status: Not listed
Gazetted date: 28 Apr 2000
Profile last updated: 01 Dec 2017

Description

A broadly spreading to erect shrub to 2.5 m high. The leaves are prickly, narrow, often bright green, to 22 mm long and clustered along short lateral branches. Flowers are “spider-like”, 2.5 - 3.5 cm long and may be red to pinkish, yellow, pale orange or greenish.

Distribution

Endemic to Western Sydney, centred on an area bounded by Blacktown, Erskine Park, Londonderry and Windsor with outlier populations at Kemps Creek and Pitt Town.

Habitat and ecology

  • Grows on reddish clay to sandy soils derived from Wianamatta Shale and Tertiary alluvium (often with shale influence), typically containing lateritic gravels.
  • Recorded from Cumberland Plain Woodland, Castlereagh Ironbark Woodland, Castlereagh Scribbly Gum Woodland and Shale/Gravel Transition Forest.
  • Associated canopy species within Cumberland Plain Woodland and Shale/Gravel Transition Forest include Eucalyptus tereticornis, E. moluccana, E. crebra, E. fibrosa and E. eugenioides. Understorey species include Bursaria spinosa, Dillwynia sieberi, Ozothamnus diosmifolius, Daviesia ulicifolia, Acacia falcata, Acacia parramattensis, Themeda australis, Aristida ramosa, Cymbopogon refractus, Eragrostis brownii, Cheilanthes sieberi, Dianella revoluta and Goodenia hederacea.
  • In Castlereagh Woodland on more sandy soils the dominant canopy species are Eucalyptus fibrosa, E. sclerophylla, Angophora bakeri and Melaleuca decora. Understorey species include Melaleuca nodosa, Hakea sericea, Cryptandra spinescens, Acacia elongata, Gonocarpus teucrioides, Lomandra longifolia and the threatened species Dillwynia tenuifolia, Pultenaea parviflora, Micromyrtus minutiflora and Allocasuarina glareicola.
  • Flowering may occur sporadically throughout the year, but particularly between July and October. Flowers are reported to be bird pollinated although bees have also been observed visiting flowers.
  • Plants are killed by fire with regeneration solely from soil-stored seed. Fire leads to a sudden increase in the recruitment of seedlings. Germination experiments show that germination rates are improved by exposure to both smoke and heat. The frequency of fire is likely to be an important factor. If fires are too frequent there may be insufficient time to build up seed in the soil to replace plants killed in the fire.
  • Physical disturbance of the soil appears to result in an increase in seedling recruitment. Has a tendency to colonise mechanically disturbed areas
  • Dense growth of blackthorn (Bursaria) can limit the ability of the species to spread.
  • Most prolific seeding occurs on plants more than 1m high.

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 BasinCumberland Known None