Silky oak Grevillea robusta in flower, photographed by Jan Smith.

Belongs within: Grevilleoideae.

Grevillea is a genus of about 270 species of trees and shrubs found in Australia and New Guinea. Some species are popular garden plants for their bright comb-like flowers. One such species is the largest member of the genus, the silky oak G. robusta, a native of coastal eastern Australia growing to over 30 m in height.

Characters (from Foreman 1995): Leaves spiralled to alternate, simple or pinnate, usually with differentiated upper and lower surfaces. Inflorescences terminal or axillary, panicles or raceme-like, sometimes with flowers borne on one side. Peduncles absent. Indumentum adpressed, hairs 2-branched or appearing to be attached near the middle. Flowers bisexual, pedicellate, in pairs, subtended by small, non-persisting bract; floral bracts absent. Perianth mostly recurved; limb oblique, globular, segments coherent at limb for some time after tube splits open. Anthers all perfect, ovate or oblong, sessile in concave limb segments; connective not usually prolonged. Disc fleshy, semi-annular or annular, mostly entire or sometimes more or less bilobed. Ovary shortly stipitate or sessile, 1-locular; ovules 2, hemitropous, attached laterally; style often elongated, protruding from slit on lower side of tube, retained for some time by coherent limb segments, eventually free; pollen presenter more or less dilated, straight, oblique or lateral and disc-like; stigma usually in centre of pollen presenter. Fruit a follicle, coriaceous to woody. Seeds 1 or 2, flat, orbicular or oblong, winged all around or occasionally wingless.

    |--G. acuaria G04b
    |--G. adenotricha LK14
    |--G. agrifolia LK14
    |    |--G. a. ssp. agrifolia LK14
    |    `--G. a. ssp. microcarpa LK14
    |--G. anethifolia G04b
    |--G. arenaria T08
    |    |--G. a. var. arenaria T08
    |    `--G. a. var. canescens T08
    |--G. aspleniifolia H90
    |--G. baileyana McGillivray 1993 (see below for synonymy) F95
    |--G. bipinnatifida S35
    |--G. bracteosa B00
    |--G. brownii GK00
    |--G. cagiana G04b
    |--G. caleyi H90
    |--G. chrysodendron C16
    |--G. cirsiifolia M87
    |--G. cravenii LK14
    |--G. cunninghamii LK14
    |--G. decipiens G04b
    |--G. depauperata GK00
    |--G. dimidiata LK14
    |--G. diversifolia GK00
    |--G. donaldiana LK14
    |--G. dryandri LK14
    |--G. erectiloba G04a
    |--G. eriostachya M93
    |--G. eryngioides H18
    |--G. erythroclada LK14
    |--G. fasciculata GK00
    |--G. georgeana G04a
    |--G. glauca Knight 1809 [incl. G. gibbosa Brown 1810] F95
    |--G. goodii M87
    |--G. heliosperma VT13
    |--G. helmsiana H15
    |--G. huegelii G04b
    |--G. ilicifolia R35
    |--G. insignis G04b
    |    |--G. i. ssp. insignis G04b
    |    `--G. i. ssp. elliotii G04b
    |--G. integrifolia S95
    |--G. juncifolia MLP09
    |--G. juniperina B00
    |--G. lanigera G76
    |--G. latifolia LK14
    |--G. laurifolia M87
    |--G. leptobotrys GK00
    |--G. linearis C08
    |--G. longifolia H90
    |--G. lullfitzii G04b
    |--G. maherae LK14
    |--G. microstyla LK14
    |--G. mimosoides LK14
    |--G. monticola LK00
    |--G. myosodes LK14
    |--G. nematophylla G04b
    |--G. obliquistigma G04a
    |--G. paniculata S95
    |--G. papuana Diels 1916 [incl. G. subargentea White 1922] F95
    |--G. paradoxa G04a
    |--G. parallela LK14
    |--G. petrophiloides S95
    |--G. pilosa G04b
    |--G. pilulifera GK00
    |--G. polystachya C16
    |--G. prasina LK14
    |--G. pritzelii S95
    |--G. pteridifolia WF01
    |--G. pterosperma CC03
    |--G. pulchella GK00
    |--G. punicea NC91
    |--G. pyramidalis LK14
    |    |--G. p. ssp. pyramidalis LK14
    |    `--G. p. ssp. leucadendron LK14
    |--G. quercifolia GK00
    |--G. refracta LK14
    |--G. renwickiana von Mueller 1887 M87
    |--G. repens M87
    |--G. robusta SK02
    |--G. sarissa CC03
    |--G. scabra LK00
    |--G. sericea H87
    |--G. stenobotrya B05
    |--G. striata C16
    |--G. trinervis C08
    |--G. wickhamii GYD12
    |    |--G. w. ssp. wickhamii LK14
    |    `--G. w. ssp. pallida LK14
    `--G. wilsonii GL04

Grevillea baileyana McGillivray 1993 [incl. G. edelfeltii Muell. 1885 (n. n.), Kermadecia pinnatifida Bailey 1886, G. pinnatifida (Bailey) Bailey 1886 non Jacques 1843] F95

*Type species of generic name indicated


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[C08] Cambage, R. H. 1908. Notes on the native flora of New South Wales. Part VI. Deepwater to Torrington and Emmaville. Proceedings of the Linnean Society of New South Wales 33 (1): 45–65, pls 1–2.

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[H90] Harden, G. J. (ed.) 1990. Flora of New South Wales vol. 1. New South Wales University Press.

[H87] Haviland, E. 1887. Flowering seasons of Australian plants. No. I—List of plants indigenous in the neighbourhood of Sydney, flowering during July. Proceedings of the Linnean Society of New South Wales, series 2, 1 (4): 1049–1051.

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[VT13] Vigilante, T., J. Toohey, A. Gorring, V. Blundell, T. Saunders, S. Mangolamara, K. George, J. Oobagooma, M. Waina, K. Morgan & K. Doohan. 2013. Island country: aboriginal connections, values and knowledge of the Western Australian Kimberley islands in the context of an island biological survey. Records of the Western Australian Museum Supplement 81: 145–182.

[WF01] Woinarski, J. C. Z., A. Fisher, K. Brennan, I. Morris & R. Chatto. 2001. Patterns of bird species richness and composition on islands off Arnhem Land, Northern Territory, Australia. Austral Ecology 26: 1–13.

Last updated: 2 August 2017.

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