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Herbs & Plants

Cycas media

Botanical Name : Cycas media
Family: Cycadaceae
Genus: Cycas
Species: C. media
Kingdom: Plantae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales

Common Names:Cycas or Cycads
In many areas cycads are also referred to as palms or ferns, particularly in local vernacular languages, and in Mexico they are also referred to as a type of corn, probably in reference to the female cones in Zamiaceae. A thorough compilation of local and vernacular names for cycads around the world has been prepared by Bonta and Osborne (2003).

Habitat : Cycas media is  native to woodlands of Queensland, Australia.Widely distributed in Australia, from the top of Cape York down to Rockhampton, as well as on some offshore islands, and New Guinea.Typically found near the coast on scrubby hillsides and gullies up onto the ridges. Most areas show signs of burning off.

Description:
Cycas media is a palm-like tall shrub. The leathery, thick leaves are divided and grow from the center in a palm-like arrangement.Height of caudex 2.7m, diameter 64.0cm and unbranched. Number of seed sporophylls from crown about 40. Number of ovules about 200 which average 4 to 6 per sporophyll. Length of sporophyll 37.5cm, original colour of seed green but yellow when ripe. Length of seed 40.0mm and breadth 30.0mm.

Frond leaves 42 to 45, length of leaf 1.2m, length of rachis 1.5m. short spines on rachis below leaves 5 to 7 each side, approximately 2.5-3.0cm, pairs of leaflets 45 to 50 pairs.

 

CLICK & SEE THE PICTURES

Length at top of frond 25cm across pair, middle measurement 77cm across pair. Lower measurement 39cm across pair, with a prominent midrib nerve. The fronds are glossy green below and yellow green beneath. Some leaf rachis are squarish and others round when viewed at cut end. Average height of tallest specimens about 3.0-3.5m.

Medicinal Uses:
Seeds used in folk medicine.  They have been used mainly topically to treat sores and skin diseases. In India the seeds are used as a remedy for insomnia.

Other Uses:
All plant parts are considered highly toxic. However, the seeds are eaten by Aborigines after careful and extensive preparation to remove the toxins

Disclaimer:
The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.

Resources:
http://www.conifers.org/zz/Cycadales.php
http://en.wikipedia.org/wiki/Cycas_media

http://plantnet.rbgsyd.nsw.gov.au/PlantNet/cycad/images/Cycas_media_1.jpg

http://www.pacsoa.org.au/cycads/Cycas/media.html

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Categories
Herbs & Plants

Sago Cycad (Cycas revoluta)

Botanical Name : Cycas revoluta
Family: Cycadaceae
Genus: Cycas
Kingdom: Plantae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Species: C. revoluta

Habitat : E. Asia – China, Japan. Found mainly on the sea shore in S. Japan. Thickets on hillsides on islands, sparse forests on mainland at elevations of 100 – 500 metres in Fujian, China

Description:
Cycas revoluta (sago cycad), is an attractive plant native to southern Japan. Though often known by the common name of king sago palm, or just sago palm, it is not a palm at all, but a cycad.

click & see the pictures.
This very symmetrical plant supports a crown of shiny, dark green leaves on a thick shaggy trunk that is typically about 20 cm (7.9 in) in diameter, sometimes wider. The trunk is very low to subterranean in young plants, but lengthens above ground with age. It can grow into very old specimens with 6–7 m (over 20 feet) of trunk; however, the plant is very slow-growing and requires about 50–100 years to achieve this height. Trunks can branch multiple times, thus producing multiple heads of leaves.

The leaves are a deep semiglossy green and about 50–150 cm (20–59 in) long when the plants are of a reproductive age. They grow out into a feather-like rosette to 1 m (3.3 ft) in diameter. The crowded, stiff, narrow leaflets are 8–18 cm (3.1–7.1 in) long and have strongly recurved or revolute edges. The basal leaflets become more like spines. The petiole or stems of the Sago Cycad are 6–10 cm (2.4–3.9 in) long and have small protective barbs that must be avoided.

Cultivation :
Requires a strong loam with sharp sand and good drainage. Succeeds in dry soils. Requires a sunny position. Although it is the hardiest cycad, this species is not fully hardy in Britain but can tolerate occasional lows to about -5°c so long as the crown is protected and so is worthwhile trying outdoors in a sheltered position in the mildest areas of the country. Alternatively, it can be given greenhouse or conservatory protection over the winter and be placed outdoors in the summer. Plants are very slow growing. 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. 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. Dioecious, male and female plants must be grown if seed is required.

Cycas revoluta is one of the most widely cultivated cycads, grown outdoors in warm temperate and subtropical regions, or under glass in colder areas. It grows best in sandy, well-drained soil, preferably with some organic matter. It needs good drainage or it will rot. It is fairly drought-tolerant and grows well in full sun or outdoor shade, but needs bright light when grown indoors. The leaves can bleach somewhat if moved from indoors to full sun outdoors.

Propagation:
Cycas revoluta is either by seed or by removal of basal offsets. As with other cycads, it is dioecious, with the males bearing cones and the females bearing groups of megasporophylls. Pollination can be done naturally by insects or artificially.

Seed – best sown in a greenhouse as soon as it is ripe, 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. Pre-soak stored seed for 24 hours in warm water then treat as above. Division of suckers in the spring.

Edible Uses

Edible Parts: Seed; Stem.
Seed – raw or cooked. They can be dried and ground into a powder then mixed with brown rice and fermented into ‘date miso’ or ‘sotetsu miso’. 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. A starch can be extracted from this pith and is used for making dumplings. It is very sustaining.

You may click see : How  Sago  starch is extracted from the pith of sago palm stems and make edible.

Medicinal Actions & Uses

Astringent; Cancer; Diuretic; Emmenagogue; Expectorant; Tonic.

The leaves are used in the treatment of cancer and hepatoma. The terminal shoot is astringent and diuretic. The seed is emmenagogue, expectorant and tonic. It is used in the treatment of rheumatism. Substances extracted from the seeds are used to inhibit the growth of malignant tumours.

Other Uses:
Of all the cycads, the Sago Palm is the most popular in horticulture. It is seen in almost all botanical gardens, in both temperate and tropical locations. In many areas of the world, it is heavily promoted commercially as a landscape plant. It is also quite popular as a bonsai plant. First described in the late 1700s, it is native to various areas of southern Japan and is thus tolerant of mild to somewhat cold temperatures, provided the ground is dry. Frond damage can occur at temperatures below -10 °C or 15 degrees F and there are several healthy plants that have been grown with little protection as far north as Nashville Tennessee and Newport News Virginia, both are in zone 7b… The cycad revoluta usually defoliates in this temperate climate, but it usually will flush (or grow) several new leaves by April. It does however require hot summers with mean temperatures of 30 to 35 °C (86 to 95 F) for successful growth, making outdoor growing impossible in colder places such as northern Europe or the Northeast US, even where winter temperatures are not too cold. One disadvantage of its domestic use is that it is poisonous to animals and humans. One skin breaking scrape can lead to a hospital visit.

Known Hazards :  The plants contain alkaloids of carcinogens and also an amino-acid that causes chronic nervous disorders. 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.

Disclaimer:The information presented herein is intended for educational purposes only. Individual results may vary, and before using any supplements, it is always advisable to consult with your own health care provider.

Resources:
http://www.pfaf.org/database/plants.php?Cycas+revoluta
http://en.wikipedia.org/wiki/Cycas_revoluta

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