Paradise Tree, Bitterwood, Dysentery-bark

Simarouba glauca

Physical Characteristics

Simarouba glauca is an evergreen Tree growing to 15 m (49ft) by 15 m (49ft) at a fast rate. See above for USDA hardiness. It is hardy to UK zone 10. The flowers are pollinated by Bees. The plant is not self-fertile. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils and can grow in very alkaline soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist or wet soil.

Distribution

Central America - Panama to Mexico. Caribbean - Cuba to southern Florida.

Habitats

Edible Uses

Edible Parts: Fruit Oil Seed Edible Uses: Oil Fruit - raw[331 ]. The thick, white juicy flesh is slightly astringent, sweetish, and insipid[331 ]. The fruit closely resembles an olive, hence the local name 'aceituno'[331 ] The fruit is eaten commonly, but is of inferior quality and not highly esteemed[331 ]. The oval fruits are mostly 15 - 20mm long[331 ]. The seeds contain 60 - 75% edible oil that can be extracted by conventional methods. Each well-grown tree yields 15 to 30 Kg nutlets equivalent to 2.5-5 kg oil and about the same quantity of oilcake. This amounts to 1000-2000 kg oil/ha/year and about the same quantity of oilcake. The oil is largely used in the preparation of bakery products in Central America. In India too it can be used in the manufacture of vanaspati, vegetable oil and/or margarine. The oil is free from bad cholesterol[418 ].

Medicinal Uses

Antidiarrhoeal Antihaemorrhoidal Astringent Cancer Digestive Dysentery Emmenagogue Febrifuge Malaria Parasiticide Tonic The leaves and bark have a long history of medicinal use in the tropics, particularly in the treatment of malaria, fevers and dysentery; as an astringent to stop bleeding; and as a tonic[318 ]. They are also used as a digestive, emmenagogue and to treat parasites both within and on the body[318 ]. Research has discovered a range of medically active compounds in the plant. The main active compounds are a group of triterpenes called quassinoids. The antiprotozoal and antimalarial properties of these chemicals have been documented for many years. Several of the quassinoids found in simarouba, such as ailanthinone, glaucarubinone, and holacanthone, are considered the plant's main therapeutic constituents and are the ones documented to be antiprotozoal, anti-amoebic, antimalarial, and even toxic to cancer and leukaemia cells. Studies have shown that the plant is over 90% effective against amoebic dysentery[318 ] The bark, and/or its three main quassinoids, have been shown to be an effective treatment against malaria, including strains that have become resistant to drug treatment[318 ]. Research has also shown that the bark has good antiviral properties, effective against herpes, influenza, polio, and vaccinia viruses[318 ]. The quassinoids responsible for the anti-amoebic and antimalarial properties have also been shown to possess active cancer-killing properties[318 ]. The bark is used as a bitter tonic[46 ]. It is known as 'Jamaica Bark' or 'Orinoco Simaruba Oil'[46 ]. A decoction is taken internally in the treatment of diarrhoea, dysentery, malaria, fevers, haemorrhages, intestinal parasites and colitis[318 ].

Known Hazards

None known