Gastrodia elata - Tien Ma

Family:	Orchidaceae
Habit:	Perennial
Height:	1
Width:	0.3
Synonyms:
Range:	E. Asia - China, Japan, Korea.

Gastrodia elata (Tien Ma) is a Perennial which grows to a height of 1m and a width of 0.3m . It has a hardness rating of 6.
Tien Ma will flower in January to February. The flowers from this plant are hermaphrodite (has both male and female organs) and they are pollinated by

Soil Information

Tien Ma will grow in light (sandy),medium (loamy),hard (clay) soil. It is not necessary for the soil to be well drained.
The soil prefers the following PH / acid levels :
- pH of less than 6, Acidic soils
- pH between 6 and 8, Neutral soils
- pH greater than 8, Basic soils
Tien Ma prefers moist soils

Ideal Planting Locations

Tien Ma can grow in full or semi shaded areas.

Woods in the mountains of N. Japan[58].

Planting places suited to this plant described below.

• Grows within a woodland garden
• Works within dappled Shade
• Grows in a shady edge
• Is suited to a deeply shaded location

Cultivation Details

A saprophytic herb, it is without green parts and is entirely dependant upon a fungus for its nutriment[238]. This makes it very difficult to cultivate outside its native range. As well as its fungal host, it also requires a damp humus-rich soil in a sheltered woodland position[238]. The plants are very hardy, tolerating temperatures down to at least -15°c[238]. This plant is becoming increasingly rare in the wild, due to over-collection as a medicinal plant[238]. Methods of cultivating it have now been devised in China[238]. Orchids are, in general, shallow-rooting plants of well-drained low-fertility soils. Their symbiotic relationship with a fungus in the soil allows them to obtain sufficient nutrients and be able to compete successfully with other plants. They are very sensitive to the addition of fertilizers or fungicides since these can harm the symbiotic fungus and thus kill the orchid[230].

Edible Uses*

* See disclaimer
Edible Rating: 2/5
Root - raw or roasted[61, 178]. Large[178].

• Root - includes bulbs, corms, tubers, rhizomes etc.

Medicinal Uses*

* See disclaimer
Medicinal Rating: 3/5
This species has been used in Chinese herbal medicine for over 1,500 years[238]. The root contains a number of phenolic compounds with medicinal actions[279]. It is a sweet, acrid, herb that is analgesic, anticonvulsive, antispasmodic, carminative, cholagogue, sedative and tonic[147, 174, 176, 238, 279]. It is used internally in the treatment of convulsive illnesses (such as epilepsy and tetanus), rheumatoid arthritis, vertigo and numbness associated with liver disharmony[238]. The root is harvested in the autumn and dried for later use[238]. The stem is aphrodisiac and tonic[218].

• Analgesic - Relieves pain.
• Antispasmodic - Relaxes muscular spasms and cramps, calming nervous irritation.
• Aphrodisiac - Increases the sexual appetite.
• Carminative - Reduces flatulence and expels gas from the intestines.
• Cholagogue - Increases the flow of bile and its discharge from the body.
• Sedative - Gently calms, reducing nervousness, distress and irritation.
• Tonic - Improves general health. Slower acting than a stimulant, it brings steady improvement.

Propagation

Seed - surface sow, preferably as soon as it is ripe, into the plants natural habitat near existing colonies, or onto a bed of Quercus wood inoculated with the fungus Armillaria mellea (introduce this fungus into your land with extreme caution since it kills trees and there is no known preventative[K]). The seed of this species is extremely simple, it has a minute embryo surrounded by a single layer of protective cells. It contains very little food reserves and depends upon a symbiotic relationship with a species of soil-dwelling fungus. The fungal hyphae invade the seed and enter the cells of the embryo. The orchid soon begins to digest the fungal tissue and this acts as a food supply for the plant. Division in autumn. The plant is very intolerant of root disturbance, any moving or dividing should be attempted in the autumn, keep a large ball of soil around the plant[1].

Known Hazards

None known

Other Uses

None known

Cultivars

no recorded cultivars

References

Flora of Japan. (English translation)
Ohwi. G.
Author: Ohwi. G.
Rating:
Publisher : The standard work. Brilliant, but not for the casual reader.
Date of Publication : 1965

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