Grevillea robusta
A.Cunn. ex R.Br.
Proteaceae
Grevillea pectinata R.Br.
Grevillea umbratica A.Cunn. ex Meissner.
Stylurus robustus (A.Cunn.) O.Deg.
Common Name: Silky Oak
Flowering as a 16 metre tall street tree in Israel
Photograph by: RickP
Creative Commons Attribution 2.5
Flowering branches
Photograph by: RickP
Creative Commons Attribution 2.5
Leaves and flowers
Photograph by: Bidgee
Creative Commons Attribution-Share Alike 2.5-au
Seeds and open seed capsule
Photograph by: RickP
Creative Commons Attribution 2.5
Developing seedpods
Photograph by: RickP
Creative Commons Attribution 2.5
General Information
Grevillea robusta is a deciduous tree with a dense, conical crown; it can grow 12 - 25 metres tall with exceptional specimens up to 40 metres[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The bole, which can be 80 - 120cm in diameter, is straight, unbuttressed, and can be free of branches for up to 15 metres[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The tree is often cultivated in the tropics for timber and as a windbreak[
302- Title
- Tropical Ornamentals; A Guide
- Publication
-
- Author
- Whistler. W. Arthur.
- Publisher
- Timber Press Inc. Oregon.
- Year
- 2000
- ISBN
- 0-88192-448-2
- Description
- An excellent little guide to some of the more commonly cultivated ornamental plants of the Tropics, often giving some information on the plants other uses.
]. It is a very ornamental plant, valued especially for its attractive fern-like foliage and brilliant orange floral display; it is often grown in gardens and as a street tree[
260- Title
- Conservatory and Indoor Plants Volumes 1 & 2
- Publication
-
- Author
- Phillips. R. & Rix. M.
- Publisher
- Pan Books, London.
- Year
- 1998
- ISBN
- 0-330-37376-5
- Description
- Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.
,
302- Title
- Tropical Ornamentals; A Guide
- Publication
-
- Author
- Whistler. W. Arthur.
- Publisher
- Timber Press Inc. Oregon.
- Year
- 2000
- ISBN
- 0-88192-448-2
- Description
- An excellent little guide to some of the more commonly cultivated ornamental plants of the Tropics, often giving some information on the plants other uses.
]. The tree flowers freely in subtropical areas, but only poorly in the lowland tropics[
307- Title
- Tropical and Subtropical Trees - A Worldwide Encyclopaedic Guide.
- Publication
-
- Author
- Barwick. M.
- Publisher
- Thames & Hudson, London
- Year
- 2004
- ISBN
- 0-500-51181-0
- Description
- A superb book, very concise and well written, giving a wealth of information on 400 or more species including descriptions, habitat, cultivation details and plant uses. A wealth of colour photographs bring each plant vividly to life.
].
Known Hazards
This species has occasionally caused contact dermatitis following contact with the foliage or sawdust[
]. This is due to due to tridecylresorcinol, a chemical compound related to the allergen toxicodendron[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The flower buds, fruit and seeds are cyanogenic[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Botanical References
154- Title
- Flora of Victoria.
- Publication
-
- Author
- Ewart. A. J.
- Publisher
- University Press; Melbourne
- Year
- 1930
- ISBN
-
- Description
- A flora of eastern Australia, it is rather short on information that is useful to the plant project.
,
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
,
Range
Australia - New South Wales, Queensland.
Habitat
Riverine rain forests, usually by water, on soils of fairly high fertility[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Also found in vine forests, which cover extensive areas including steep upper-valley slopes[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Properties
Edibility Rating | |
Other Uses Rating | |
Habit | Evergreen Tree |
Height | 25.00 m |
Growth Rate | Fast |
Pollinators | Birds, Fruit bats, Bees |
Cultivation Status | Cultivated, Ornamental, Wild |
Cultivation Details
Succeeds in warm temperate to tropical regions[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. In tropical areas it can grow at elevations from 130 - 2,300 metres, whilst in the temperate zone it is found from sea level to 1,000 metres[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The plant is found in areas where the mean annual rainfall is in the range 700 - 1,700mm, with a dry season of 0 - 6 months[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. The mean maximum temperature of the hottest month is 25 - 31°c, the mean minimum temperature of the coldest month is 2 - 12°c, and the mean annual temperature is 14 - 23°c[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
An easy and fast-growing tree requiring a well-drained slightly acid soil and a sunny position[
260- Title
- Conservatory and Indoor Plants Volumes 1 & 2
- Publication
-
- Author
- Phillips. R. & Rix. M.
- Publisher
- Pan Books, London.
- Year
- 1998
- ISBN
- 0-330-37376-5
- Description
- Excellent photos of over 1,100 species and cultivars with habits and cultivation details plus a few plant uses. Many species are too tender for outdoors in Britain though there are many that can be grown outside.
]. It prefers a rich moist soil[
167- Title
- A Field Guide to Australian Trees.
- Publication
-
- Author
- Holliday. I. and Hill. R.
- Publisher
- Frederick Muller Ltd.
- Year
- 1974
- ISBN
- 0-85179-627-3
- Description
- A well illustrated and very readable book, but it does not contain much information for the plant project.
], but it also succeeds in dry soils. Dislikes limey soils and heavy clays[
1- Title
- RHS Dictionary of Plants plus Supplement. 1956
- Publication
-
- Author
- F. Chittendon.
- Publisher
- Oxford University Press
- Year
- 1951
- ISBN
- -
- Description
- Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
,
157- Title
- Australian Native Plants.
- Publication
-
- Author
- Wrigley. J. W. and Fagg. M.
- Publisher
- Collins. (Australia)
- Year
- 1988
- ISBN
- 0-7322-0021-0
- Description
- A lovely book, written in order to encourage Australian gardeners to grow their native plants. A little bit of information for the plant project.
,
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Established plants are drought resistant[
154- Title
- Flora of Victoria.
- Publication
-
- Author
- Ewart. A. J.
- Publisher
- University Press; Melbourne
- Year
- 1930
- ISBN
-
- Description
- A flora of eastern Australia, it is rather short on information that is useful to the plant project.
,
341- Title
- South American Timbers: the Properties, Uses and Characteristics of 190 Species.
- Publication
-
- Author
- Bolza. E. & Christensen. F.J.
- Publisher
- Commonwealth Scientific and Industrial Research Organization
- Year
- 1979
- ISBN
- 0 643 02582 0
- Description
- A very useful guide.
]. Dislikes strong winds[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. Succeeds in soils with a pH in the range 4.5 - 8[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]. On acid soils, symptoms of boron deficiency and manganese toxicity have been observed[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The tree first flowers when about 6 years old. In its natural range, flowering occurs over a few weeks in October-November, but when planted in equatorial latitudes, flowering is sporadic throughout the year or absent[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
When climate and soil are suitable and weed competition is not severe, annual height and diameter increments of at least 2 metres and 2cm, respectively, are usually achieved for the first few years in row planting on farms. Annual height increments of 3 metres have been observed at the most favourable sites[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Grevillea robusta regrows well after complete defoliation following pruning and pollarding, which can be carried out repeatedly to yield wood and to regulate shading and competition with adjacent crops[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The tree is characterized by root suckering, hence it is a good candidate for management under coppice rotation; it responds well to pollarding, lopping and pruning[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
The leaves and twigs are apparently rich in aluminium[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
Hybridizes freely with other members of this genus[
157- Title
- Australian Native Plants.
- Publication
-
- Author
- Wrigley. J. W. and Fagg. M.
- Publisher
- Collins. (Australia)
- Year
- 1988
- ISBN
- 0-7322-0021-0
- Description
- A lovely book, written in order to encourage Australian gardeners to grow their native plants. A little bit of information for the plant project.
].
The flowers are very attractive to bees[
154- Title
- Flora of Victoria.
- Publication
-
- Author
- Ewart. A. J.
- Publisher
- University Press; Melbourne
- Year
- 1930
- ISBN
-
- Description
- A flora of eastern Australia, it is rather short on information that is useful to the plant project.
].
Plants in this genus are notably resistant to honey fungus[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
Edible Uses
The flowers are one of the richest sources of nectar[
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
]. This can be sucked directly from the flowers, shaken into a bowl or washed out in a small quantity of water[
183- Title
- Cornucopia - A Source Book of Edible Plants.
- Publication
-
- Author
- Facciola. S.
- Publisher
- Kampong Publications
- Year
- 1990
- ISBN
- 0-9628087-0-9
- Description
- Excellent. Contains a very wide range of conventional and unconventional food plants (including tropical) and where they can be obtained (mainly N. American nurseries but also research institutes and a lot of other nurseries from around the world.
]. The nectar falls in showers when the flowers are shaken[
144- Title
- Wild Food in Australia.
- Publication
-
- Author
- Cribb. A. B. and J. W.
- Publisher
- Fontana
- Year
- 1976
- ISBN
- 0-00-634436-4
- Description
- A very good pocket guide.
].
The leaves contain rutin, though quantities are not specified[
240- Title
- Glossary of Indian Medicinal Plants (Including the Supplement).
- Publication
-
- Author
- Chopra. R. N., Nayar. S. L. and Chopra. I. C.
- Publisher
- Council of Scientific and Industrial Research, New Delhi.
- Year
- 1986
- ISBN
- -
- Description
- Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
]
Medicinal
None known
Agroforestry Uses:
This tree is one of the most important reforestation trees in Nepal[
272- Title
- Plants and People of Nepal
- Publication
-
- Author
- Manandhar. N. P.
- Publisher
- Timber Press. Oregon.
- Year
- 2002
- ISBN
- 0-88192-527-6
- Description
- Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
]. It is a pioneering colonizer of disturbed sites[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
An excellent agroforestry species as it interferes little with crops. Best growth is obtained when it is planted in rows or intermixed with crops[
]. It is regarded as more compatible with crops on small farms than most other tree species[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
The leaves are used as a mulch[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
The silky oak provides abundant quantities of leaf mulch, which may accumulate to a depth of 30 - 40 cm. This thick layer protects the soil and maintains soil temperature[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
It is used to provide high shade in tea and coffee plantations[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
,
].
Other Uses
The plant yields small quantities of a gum resin[
154- Title
- Flora of Victoria.
- Publication
-
- Author
- Ewart. A. J.
- Publisher
- University Press; Melbourne
- Year
- 1930
- ISBN
-
- Description
- A flora of eastern Australia, it is rather short on information that is useful to the plant project.
]. By virtue of their solubility, viscosity and relatively high resistance to hydrolysis, the gums may have some industrial applications[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
]
Intense yellow and green dyes are obtained from the leaves[
168- Title
- Nature's Colors - Dyes from Plants.
- Publication
-
- Author
- Grae. I.
- Publisher
- MacMillan Publishing Co. New York.
- Year
- 1974
- ISBN
- 0-02-544950-8
- Description
- A very good and readable book on dyeing.
].
This species is more resistant than other members of the genus to root-rotting fungus, it is sometimes used as a rootstock for the more susceptible species[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
].
The heart-wood is distinctly pink or light red when freshly cut, turning pale brown or red-brown on exposure; the band of white or straw-coloured sapwood is about 40mm wide[
]. The texture is medium to coarse; the grain may be straight or wavy; growth rings are not distinct; large rays give the wood an attractive figure on both the quarter-cut and back-cut surfaces; the vessels contain some red deposits. The wood is strong, light in weight, durable but porous. The wood saws easily, apart from gumming up the saw-blades; stock moulds easily and cleanly, but 10° cutting angle required to obtain good finish on quarter-cut faces; mortising and chiselling properties usually good; material needs scraping to ensure a good polish; it stains readily; takes nails easily but splitting may occur - nail
holding power medium to low. It is easily split. The wood is used for panelling, joinery, cabinet making etc[
46- Title
- Dictionary of Economic Plants.
- Publication
-
- Author
- Uphof. J. C. Th.
- Publisher
- Weinheim
- Year
- 1959
- ISBN
- -
- Description
- An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
154- Title
- Flora of Victoria.
- Publication
-
- Author
- Ewart. A. J.
- Publisher
- University Press; Melbourne
- Year
- 1930
- ISBN
-
- Description
- A flora of eastern Australia, it is rather short on information that is useful to the plant project.
,
156- Title
- Useful Wild Plants in Australia.
- Publication
-
- Author
- Cribb. A. B. and J. W.
- Publisher
- William Collins Pty Ltd. Sidney
- Year
- 1981
- ISBN
- 0-00-216441-8
- Description
- A very readable book.
,
167- Title
- A Field Guide to Australian Trees.
- Publication
-
- Author
- Holliday. I. and Hill. R.
- Publisher
- Frederick Muller Ltd.
- Year
- 1974
- ISBN
- 0-85179-627-3
- Description
- A well illustrated and very readable book, but it does not contain much information for the plant project.
,
341- Title
- South American Timbers: the Properties, Uses and Characteristics of 190 Species.
- Publication
-
- Author
- Bolza. E. & Christensen. F.J.
- Publisher
- Commonwealth Scientific and Industrial Research Organization
- Year
- 1979
- ISBN
- 0 643 02582 0
- Description
- A very useful guide.
]. It is suitable for pulping[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
].
A popular plant for firewood and charcoal. It is also used to fuel locomotives and river steamers, power boilers etc. The calorific value of sapwood is about 4800 kcal/kg, while that of heartwood is 4950 kcal/kg[
303- Title
- World Agroforesty Centre
- Publication
-
- Author
-
- Website
- http://www.worldagroforestry.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- An excellent online database of a huge range of trees giving very good information on each plant - its uses, ecology, identity, propagation, pests etc.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
Propagation
Seed - they have no dormancy but germination is delayed and uneven. Soaking the seed in cold water for 24 hours prior to sowing may improve germination[
]. Seeds can be sown in well-drained, shady seedbeds or individual containers, using with equal proportions of sandy loam and sand. Germination is usually good, occurring after 2 - 4 weeks[
78- Title
- Propagation of Trees, Shrubs and Conifers.
- Publication
-
- Author
- Sheat. W. G.
- Publisher
- MacMillan and Co
- Year
- 1948
- ISBN
- -
- Description
- A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
,
]. When the seedlings are 7 days old, they are pricked out in polytubes. Shade is required for the first 2 - 3 weeks after transplanting[
]. In about 6 - 8 months, when the plants are 20 - 30cm tall, they can be planted out into their permanent positions[
].
Cuttings of half-ripe wood, 5 - 8cm with a heel[
78- Title
- Propagation of Trees, Shrubs and Conifers.
- Publication
-
- Author
- Sheat. W. G.
- Publisher
- MacMillan and Co
- Year
- 1948
- ISBN
- -
- Description
- A bit dated but a good book on propagation techniques with specific details for a wide range of plants.
].