Cycas revoluta
Thunb.
Cycadaceae
Common Name: Japanese Sago Palm
Cultivated plant with lots of new leaf growth in the Aswan Botanical Garden on Kitchener's Island, Aswan, Egypt
Photograph by: Karelj
Public domain
Cultivated plant with lots of new leaf growth in the Aswan Botanical Garden on Kitchener's Island, Aswan, Egypt
Photograph by: Karelj
Public domain
Cultivated tree with heavy crop of fruit, growing in Antigua village, Antigua, Fuerteventura, Canary Islands
Photograph by: Frank Vincentz
Creative Commons Attribution-Share Alike 3.0
Female cone
Photograph by: A. Barra
Creative Commons Attribution-Share Alike 3.0
Female inflorecence with develping fruits
Photograph by: Klein Benjamin
Creative Commons Attribution-Share Alike 4.0
Male cone
Photograph by: Not known
Creative Commons Attribution-Share Alike 3.0
Seeds
Photograph by: Esculapio
Creative Commons Attribution-Share Alike 3.0
Usually short and single-stemmed, though old specimens can grow fairly tall and sometimes branch, as this plant in the villa Maria Serena in Menton, Alpes-Maritimes, France
Photograph by: Tangopaso
Public domain
General Information
Japanese sago palm is a slow growing cycad, producing a crown of leaves 50 - 150cm long on a stem that is usually quite short. However, older specimens will usually develop a stem about 200 mm across, and eventually up to 6 metres tall - though this is likely to be a VERY old plant several centuries of age[
314- Title
- Palm and Cycad Societies of Australia.
- Publication
-
- Author
-
- Website
- http://www.pacsoa.org.au/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Contains at least a little information on the majority of palm and cycad species, plus a wealth of photographs. A first class website.
]. Usually single stemmed, although it is not uncommon for a plant to produce occasional offshoots which can be removed and potted up[
314- Title
- Palm and Cycad Societies of Australia.
- Publication
-
- Author
-
- Website
- http://www.pacsoa.org.au/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Contains at least a little information on the majority of palm and cycad species, plus a wealth of photographs. A first class website.
,
990- Title
- The Cycad Pages
- Publication
-
- Author
-
- Website
- http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/wlist.html
- Publisher
- Royal Botanic Gardens, Sydney.
- Year
- 2012
- ISBN
-
- Description
- A website dedicated to the various species of Cycad, with a comprehensive description of all the known species (as of 2012). At present (2015), the site is still running but is no longer being updated
].
The plant is harvested from the wild for local use as a food and medicine, it is also often grown as an ornamental in gardens[
314- Title
- Palm and Cycad Societies of Australia.
- Publication
-
- Author
-
- Website
- http://www.pacsoa.org.au/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Contains at least a little information on the majority of palm and cycad species, plus a wealth of photographs. A first class website.
].
Plants occur primarily on steep to precipitous stony sites, but previously they occurred on flatter land which has since been cleared. There has been massive seed collecting from natural habitats and leaves are exported in large numbers for decorative purposes. Current populations are considered to be stable and so the plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2011)[
338- Title
- IUCN Red List of Threatened Species
- Publication
-
- Author
-
- Website
- http://www.iucnredlist.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
].
Known Hazards
The plants contain alkaloids of carcinogens and also an amino-acid that causes chronic nervous disorders[
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.
]. Regular consumption of the plant leads to severe health problems and death. This toxic principle can be removed if the food is properly prepared but consumption of the plant still cannot be recommended because its use often means the death of the plant and it is becoming rare in the wild.
Botanical References
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.
,
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
,
990- Title
- The Cycad Pages
- Publication
-
- Author
-
- Website
- http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/wlist.html
- Publisher
- Royal Botanic Gardens, Sydney.
- Year
- 2012
- ISBN
-
- Description
- A website dedicated to the various species of Cycad, with a comprehensive description of all the known species (as of 2012). At present (2015), the site is still running but is no longer being updated
Range
E. Asia - China, Japan.
Habitat
Found mainly on the sea shore in S. Japan[
58- Title
- Flora of Japan. (English translation)
- Publication
-
- Author
- Ohwi. G.
- Publisher
- Smithsonian Institution
- Year
- 1965
- ISBN
- -
- Description
- The standard work. Brilliant, but not for the casual reader.
]. Thickets on hillsides on islands, sparse forests on mainland at elevations of 100 - 500 metres in E. China[
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
]. Primarily on steep to precipitous stony sites, but previously on flatter land now cleared[
990- Title
- The Cycad Pages
- Publication
-
- Author
-
- Website
- http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/wlist.html
- Publisher
- Royal Botanic Gardens, Sydney.
- Year
- 2012
- ISBN
-
- Description
- A website dedicated to the various species of Cycad, with a comprehensive description of all the known species (as of 2012). At present (2015), the site is still running but is no longer being updated
].
Properties
Conservation Status | Least Concern |
Edibility Rating |   |
Medicinal Rating |   |
Habit | Evergreen Tree |
Height | 3.50 m |
Growth Rate | Slow |
Pollinators | Insects, Wind |
Self-fertile | No |
Cultivation Status | Ornamental, Wild |
Cultivation Details
This species is probably the hardiest cycad, able to tolerate light frosts[
314- Title
- Palm and Cycad Societies of Australia.
- Publication
-
- Author
-
- Website
- http://www.pacsoa.org.au/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Contains at least a little information on the majority of palm and cycad species, plus a wealth of photographs. A first class website.
]. It can be grown from the warm temperate zone through to the tropics[
314- Title
- Palm and Cycad Societies of Australia.
- Publication
-
- Author
-
- Website
- http://www.pacsoa.org.au/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Contains at least a little information on the majority of palm and cycad species, plus a wealth of photographs. A first class website.
].
Requires a sunny position[
188- Title
- The RHS Gardener's Encyclopedia of Plants and Flowers
- Publication
-
- Author
- Brickell. C.
- Publisher
- Dorling Kindersley Publishers Ltd.
- Year
- 1990
- ISBN
- 0-86318-386-7
- Description
- Excellent range of photographs, some cultivation details but very little information on plant uses.
]. Plants are sometimes found in dense shade in the wild[
338- Title
- IUCN Red List of Threatened Species
- Publication
-
- Author
-
- Website
- http://www.iucnredlist.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
]. Requires a strong loam with sharp sand and good drainage[
164- Title
- Growing from Seed. Volume 4.
- Publication
-
- Author
- Bird. R. (Editor)
- Publisher
- Thompson and Morgan.
- Year
- 1990
- ISBN
- -
- Description
- Very readable magazine with lots of information on propagation. A good article on Yuccas, one on Sagebrush (Artemesia spp) and another on Chaerophyllum bulbosum.
]. Succeeds in dry soils.
Plants are very slow growing[
188- Title
- The RHS Gardener's Encyclopedia of Plants and Flowers
- Publication
-
- Author
- Brickell. C.
- Publisher
- Dorling Kindersley Publishers Ltd.
- Year
- 1990
- ISBN
- 0-86318-386-7
- Description
- Excellent range of photographs, some cultivation details but very little information on plant uses.
,
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.
].
This plant is often used as a food source in its native range but recent research has shown that it can cause chronic nervous disorders if it is not treated properly[
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.
]. Overall its use is not to be recommended, especially since it is becoming rare in the wild.
The plants produce special upward growing roots where nitrogen is produced in symbiosis with algae[
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.
].
Dioecious, male and female plants must be grown if seed is required.
Edible Uses
Seed - raw or cooked[
2- Title
- Sturtevant's Edible Plants of the World.
- Publication
-
- Author
- Hedrick. U. P.
- Publisher
- Dover Publications
- Year
- 1972
- ISBN
- 0-486-20459-6
- Description
- Lots of entries, quite a lot of information in most entries and references.
,
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.
,
177- Title
- Plants for Human Consumption.
- Publication
-
- Author
- Kunkel. G.
- Publisher
- Koeltz Scientific Books
- Year
- 1984
- ISBN
- 3874292169
- Description
- An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
]. They can be dried and ground into a powder then mixed with brown rice and fermented into 'date miso' or 'sotetsu miso'[
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.
]. Caution is advised, see the notes above on toxicity.
The heart or pith of the trunk is sliced and eaten baked or powdered. A toxic principal must first be removed[
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.
]. A starch can be extracted from this pith and is used for making dumplings[
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.
]. It is very sustaining[
2- Title
- Sturtevant's Edible Plants of the World.
- Publication
-
- Author
- Hedrick. U. P.
- Publisher
- Dover Publications
- Year
- 1972
- ISBN
- 0-486-20459-6
- Description
- Lots of entries, quite a lot of information in most entries and references.
,
177- Title
- Plants for Human Consumption.
- Publication
-
- Author
- Kunkel. G.
- Publisher
- Koeltz Scientific Books
- Year
- 1984
- ISBN
- 3874292169
- Description
- An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
].
Medicinal
The leaves are used in the treatment of cancer and hepatoma[
218- Title
- Medicinal Plants of China
- Publication
-
- Author
- Duke. J. A. and Ayensu. E. S.
- Publisher
- Reference Publications, Inc.
- Year
- 1985
- ISBN
- 0-917256-20-4
- Description
- Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
].
The terminal shoot is astringent and diuretic[
218- Title
- Medicinal Plants of China
- Publication
-
- Author
- Duke. J. A. and Ayensu. E. S.
- Publisher
- Reference Publications, Inc.
- Year
- 1985
- ISBN
- 0-917256-20-4
- Description
- Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
].
The seed is emmenagogue, expectorant and tonic[
218- Title
- Medicinal Plants of China
- Publication
-
- Author
- Duke. J. A. and Ayensu. E. S.
- Publisher
- Reference Publications, Inc.
- Year
- 1985
- ISBN
- 0-917256-20-4
- Description
- Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
]. It is used in the treatment of rheumatism[
218- Title
- Medicinal Plants of China
- Publication
-
- Author
- Duke. J. A. and Ayensu. E. S.
- Publisher
- Reference Publications, Inc.
- Year
- 1985
- ISBN
- 0-917256-20-4
- Description
- Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
]. Substances extracted from the seeds are used to inhibit the growth of malignant tumours[
218- Title
- Medicinal Plants of China
- Publication
-
- Author
- Duke. J. A. and Ayensu. E. S.
- Publisher
- Reference Publications, Inc.
- Year
- 1985
- ISBN
- 0-917256-20-4
- Description
- Details of over 1,200 medicinal plants of China and brief details of their uses. Often includes an analysis, or at least a list of constituents. Heavy going if you are not into the subject.
].
Other Uses
None known
Propagation
Seed - best sown in containers as soon as it is ripe. Stored seed should be pre-soaked for 24 hours in warm water prior to sowing. The seed should be sown 2cm deep in individual pots, which are then sealed in plastic bags to keep them moist until germination takes place. Germinates in 1 - 3 months at 25°c[
164- Title
- Growing from Seed. Volume 4.
- Publication
-
- Author
- Bird. R. (Editor)
- Publisher
- Thompson and Morgan.
- Year
- 1990
- ISBN
- -
- Description
- Very readable magazine with lots of information on propagation. A good article on Yuccas, one on Sagebrush (Artemesia spp) and another on Chaerophyllum bulbosum.
].
Division of suckers in the spring[
188- Title
- The RHS Gardener's Encyclopedia of Plants and Flowers
- Publication
-
- Author
- Brickell. C.
- Publisher
- Dorling Kindersley Publishers Ltd.
- Year
- 1990
- ISBN
- 0-86318-386-7
- Description
- Excellent range of photographs, some cultivation details but very little information on plant uses.
].
If you have any useful information about this plant, please leave a comment. Comments have to be approved before they are shown here.