Grevillea dilatata
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Grevillea
Species:
G. dilatata
Binomial name
Grevillea dilatata
(R.Br.) Downing, 2004[2]
Synonyms
  • Grevillea ilicifolia var. dilatata R.Br., 1830

Grevillea dilatata is a species of plant in the protea family that is endemic to Australia. It is native to south-eastern South Australia, including Kangaroo Island as well as the Eyre and Yorke Peninsulas.


Description

Grevillea dilatata is a shrub that grows up to 0.3–2 metres (0.98–6.56 ft) tall and up to 3 metres (9.8 ft) across. Leaves appear 'fan-shaped' with margins appearing more 'toothed' than lobed and noticeably pungent. The upper surface of the leaf is either glabrous or with sparse indumentum. The lower surface is always covered in subsericious (straight, silky) hairs.[1][3]

Taxonomy

This species was once considered part of Grevillea ilicifolia, where it was known as Grevillea ilicifolia var. dilatata.[4] A morphological study published in 2004 resulted in G. ilicifolia being separated into three species and four subspecies.[3] The specific epithet (dilatata) is a Latin word meaning "expanded" or "widened". In some publications, it is still referred to as Grevillea ilicifolia var. dilatata.[1]

Distribution and habitat

This species can be found in mallee, heath and shrubland habitats in south-eastern South Australia, including the York and Eyre penninsulas and Kangaroo Island.[1]

Conservation status

Grevillea dilatata is listed as Vulnerable on the IUCN Red List of Threatened Species, as it has lost 30% of its habitat from the 1980s to now due to land clearing for agriculture. It is currently threatened by habitat loss and fragmentation for agriculture and competition with invasive weeds. The population ia likely to be currently stable and it appears to be locally common within its distribution.[1]

References

  1. 1 2 3 4 5 Olde, P. (2020). "Grevillea dilatata". IUCN Red List of Threatened Species. 2020: e.T112652077A113309310. doi:10.2305/IUCN.UK.2020-3.RLTS.T112652077A113309310.en. Retrieved 30 December 2023.
  2. ↑ Downing, TL; Duretto, MF; Ladiges, PY (2004). "Morphological analysis of the Grevillea illicifolia complex (Proteaceae) and recognition of taxa". Australian Systematic Botany. 17 (3): 327–341. doi:10.1071/SB03026.
  3. 1 2 "Morphological analysis of the Grevillea ilicifolia complex and recognition of taxa" (PDF). Association of Societies for Growing Australian Plants (76): 11, 12. February 2007. eISSN 0725-8755.
  4. ↑ Fryer, Roger; Newland, Jill. "Grevillea dilatata (R.Br.) Downing". Retrieved 30 December 2023.


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