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Useful Tropical Plants

Cycas seemannii

A.Braun

Cycadaceae

+ Synonyms

Cycas circinalis seemannii (A.Braun) J.Schust.

Cycas neocaledonica Daveau

Cycas rumphii seemannii (A.Braun) Kaneh.

Common Name:

Cycas seemannii
Cultivated plant
Photograph by: Vilimaka Foliaki
Creative Commons License
Cycas seemannii Cycas seemannii

General Information

Cycas seemannii is a slow-growing, evergreen, palm-like plant with an erect, usually unbranched main stem that can eventually be around 1 - 12 metres tall and 10 - 30cm in diameter; this is topped by a crown of up to 50 - 80 large leaves each around 140 - 230cm long[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
The plant is sometimes harvested from the wild for local use as a source of food and a glue. A ahndsome plant, it is occasionally grown for food in home gardens, and is cultivated as an ornamental[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
,
490
Title
Flora Vitiensis Nova
Publication
 
Author
Smith. A.C.
Website
http://www.biodiversitylibrary.org
Publisher
Pacific Tropical Botanical Garden; Hawaii
Year
1979
ISBN
 
Description
A comprehensive flora of Fiji, often showing plant uses. It can be downloaded from the Internet.
,
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
A great deal of its habitat has been replaced by agriculture, yet, many plants are still encountered in patches of undisturbed forest. The plant is listed as Vulnerable based on a decline in habitat as a result of agriculture and use as a landscape plant. Decline is estimated as >30% over the past three generations (120 years) and is expected to continue[
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.
].The plant is classified as 'Vulnerable' in the IUCN Red List of Threatened Species(2010)[
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.

Botanical References

490
Title
Flora Vitiensis Nova
Publication
 
Author
Smith. A.C.
Website
http://www.biodiversitylibrary.org
Publisher
Pacific Tropical Botanical Garden; Hawaii
Year
1979
ISBN
 
Description
A comprehensive flora of Fiji, often showing plant uses. It can be downloaded from the Internet.
,
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
,
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.

Range

Southwest Pacific - New Caledonia, Fiji, Samoa, Tonga, Tuvalu, Vanuatu.

Habitat

Coastal areas, fallow areas, open forests, and savannah or grassland areas[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
]. Usually found on calcareous beach dune sands or coral limestone formations, but extending to various substrates on continental islands[
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 StatusVulnerable
Edibility Rating *
Other Uses Rating *  *
HabitEvergreen Tree
Height2.00 m
Growth RateSlow
PollinatorsInsects
Self-fertileNo
Cultivation StatusCultivated, Ornamental, Wild

Cultivation Details

Cycas seemannii is not tolerant of frosts, other than occasional light frosts. It grows in an area where the minimum-maximum temperature range is 16 - 31°c and the mean annual rainfall is 1,875mm[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
Succeeds in full sun or in light shade[
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.
]. Prefers a sandy, well-drained soil[
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.
]. Grows best in a position sheltered from cold winds[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
]. A neutral soil (pH 7), is generally best for most species of cycads and allows the proper absorption of nutrients. A slightly acid soil is better for most cycads than a basic one[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
Species in this genus can usually be transplanted easily even when quite large. The best time for moving them is just before the beginning of a new growing season, the roots being trimmed if they are damaged and perhaps some leaves being removed. New roots should develop quickly as the season progresses[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
Species in this genus form structures known as coralloid roots. These roots branch off from the taproot or secondary roots and are distinctive in that they grow laterally or upward, forming a nodular mass at the apex. These coralloid roots occur slightly below or slightly above the soil surface and generally contain cyanobacteria, also known as blue-green algae. These are able to fix atmospheric nitrogen and make it available as a nutrient to the plant. The ability to extract this important nutrient from the air explains how many cycad species are able to survive on almost sterile soils[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
A dioecious species, with individual plants producing either all male or all female cones. Therefore both male and female forms of the plant need to be grown if seed is required[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
]. On very rare occasions, usually when a plant has been under severe stress, it can change sex and produce either all female or all male cones[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].

Edible Uses

Species in this genus are generally toxic unless the food is prepared correctly. See notes above on toxicity.

Seed - cooked[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
]. The kernels are processed into a flour, mainly for use as a famine or ceremonial food[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
]. The flattened ovoid seed is around 45 - 60mm long and 36 - 48mm in diameter[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].

The fresh cones of male plants are reportedly edible[
38
Title
Simmons' Manual of Fruit.
Publication
 
Author
Simmons A. E.
Publisher
David & Charles; Newton Abbot.
Year
1978
ISBN
0-7153-7607-1
Description
A good guide to some of the cultivars of temperate fruits. It covers quite a wide range of fruits.
,
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
].

The pith of the stem is rich in starch and is used to make sago[
490
Title
Flora Vitiensis Nova
Publication
 
Author
Smith. A.C.
Website
http://www.biodiversitylibrary.org
Publisher
Pacific Tropical Botanical Garden; Hawaii
Year
1979
ISBN
 
Description
A comprehensive flora of Fiji, often showing plant uses. It can be downloaded from the Internet.
]. In some areas this food was reserved for the exclusive use of chiefs[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].

Medicinal

The fruit and bark are used medicinally[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
].

Other Uses

The bark sap is used as a glue[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
].

The fruits are strung together to make children's toys or rattles[
339
Title
Agroforestry in the Pacific Islands: Systems for Sustainability
Publication
 
Author
W.C. Clarke and R.R. Thaman (Editors)
Website
http://www.unu.edu/unupress/unupbooks/80824e/80824E00.htm#Contents
Publisher
United Nations University Press, Tokyo
Year
1993
ISBN
92-808-0824-9
Description
The guide includes information on 100 species of plants for Agroforestry. It is also available on the web at the address given above.
].

Propagation

Seeds - best sown as soon as they are ripe, though the seeds of many species will take a few months to finish maturing the embryo before they are ready to germinate. Sow the seeds in a tray in a freely-draining medium and place in moderate shade. Bottom heat at about 27°c will hasten seed germination dramatically. Young roots are quite brittle and once germination takes place, the root grows rapidly. It is important to pot up the seedlings at this time in order to give them enough root-space. Grow on the plants in pots until large enough to plant out[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
Division of off-sets or suckers is best carried out just before the plant comes in to new growth at the start of the growing season[
1935
Title
The Cycads
Publication
 
Author
Whitelock L.M.
Publisher
Timber Press; Portland, Oregon
Year
2002
ISBN
0-88192-522-5
Description
An excellent book dealing with the eleven different genera and almost 300 species of plants we know as Cycads. There are detailed descriptions and a host of other information for each species.
].
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2024-05-24. <tropical.theferns.info/viewtropical.php?id=Cycas+seemannii>

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