Synonyms: Soap Bark. Panama Bark. Cullay.
Common Names :Soap bark tree or Soapbark
Habitat: Quillaja saponaria IS native to Peru and Chile, and cultivated in Northern Hindustan.It has been introduced as an ornamental in California. Trees have been acclimatized in Spain but are rarely cultivated there. This tree occurs at altitudes to 2000 metres. The species is drought resistant, and tolerates about -12°C (10°F) in its natural habitat.
Quillaja saponaria is an evergreen tree 50 to 60 feet high. Leaves smooth, shiny, short-stalked, oval, and usually terminal white flowers, solitary, or three to five on a stalk. The tree has thick, dark bark, smooth, leathery, shiny, oval evergreen leaves 3–5 cm long, white flowers 15 mm diameter borne in dense corymbs, and a dry fruit with five follicles each containing 10-20 seeds. Bark thick, dark coloured, and very tough. In commerce it is found in large flat pieces 1/5 inch thick, outer surface brownish-white, with small patches of brownish cork attached, otherwise smooth; inner surface whitish and smooth, fracture splintery, chequered with pale-brown vast fibres, embedded with white tissue; it is inodorous, very acrid and astringent.
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Requires a well-drained fertile soil in a sunny position. Plants are hardy to about -12°c in their natural range in South America but they usually require greenhouse protection in Britain. They can succeed outdoors in the milder areas of this country, often as small shrubs but making a tree in the very mildest areas. The young growth in spring can be damaged by late frosts, so it is best to site the plant in a position sheltered from the early morning sun. This species is cultivated for the saponins in its bark in some warm temperate areas of the world.
Seed – sow spring in a greenhouse. Prick out the seedlings into individual pots when they are large enough to handle and grow them on in the greenhouse for at least their first winter. Plant out in early summer and give some protection from the cold for at least their first winter outdoors. Cuttings of fully ripe wood of the current year’s growth, November in a frame
Part Used: Dried inner bark.
Constituents: Its chief constituent is saponin, which is a mixture of two glucosides, guillaic acid and guillaia-sapotoxin. The latter is very poisonous and possesses marked foam-producing properties. Calcium oxalate is also present in the bark. The drug also contains cane-sugar and a non-toxic modification of guillaic acid. As the active principles of Soap Bark are the same as those of Senega, Quillaia has been suggested as a cheap substitute for Sarsaparilla.
Antiseborrheic; Expectorant; Skin; Stimulant.
Soap bark tree has a long history of medicinal use with the Andean people who used it especially as a treatment for various chest problems. The saponin content of the bark helps to stimulate the production of a more fluid mucous in the airways, thus facilitating the removal of phlegm through coughing. The tree is useful for treating any condition featuring congested catarrh within the chest, but it should not be used for dry irritable coughs. The inner bark contains about 9% of complex saponins, known collectively as ‘quillajasaponin’. It also contains calcium oxalate and tannin. It has been used internally as a stimulating expectorant, though it can cause irritation and inflammation of the digestive tract and so is no longer considered safe. The internal use of this plant needs to be carefully overseen by a professional practitioner. Sap bark tree is used as a source of compounds for the pharmaceutical industry. It is still used externally as a cutaneous stimulant in the treatment of skin ulcers and eruptions, dandruff etc.
The fresh or dried inner bark is a soap substitute. It contains about 9% saponins and is a very gentle and effective cleaner. It is used for cleaning textiles and the skin. It can also be used as a hair tonic. The saponins are also used in anti-dandruff shampoos and exfoliant cleansers. They are used as a foaming agent in fire extinguishers. The bark also contains considerable quantities of carbonate of lime.
Known Hazards: The plant is toxic if taken internally, tending to dissolve the blood corpuscles. The bark, and possibly other parts of the plant, contains saponins. Although toxic, saponins are very poorly absorbed by the body and so tend to pass through without causing harm, they are also destroyed by thorough cooking. Saponins are found in many plants, including several that are often used for food, such as certain beans. It is advisable not to eat large quantities of food that contain saponins. Saponins are much more toxic to some creatures, such as fish, and hunting tribes have traditionally put large quantities of them in streams, lakes etc in order to stupefy or kill the fish.
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.