Oso Berry, Indian plum

Oemleria cerasiformis

Physical Characteristics

Oemleria cerasiformis is a deciduous Shrub growing to 2.5 m (8ft) by 4 m (13ft). See above for USDA hardiness. It is hardy to UK zone 6. It is in flower from March to April. The species is dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required). and is pollinated by Insects. The plant is not self-fertile. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland). It prefers moist soil.

Distribution

Western N. America - British Columbia to California.

Habitats

Woodland Garden Dappled Shade; Shady Edge;

Edible Uses

Edible Parts: Fruit Edible Uses: Fruit - raw or cooked[46, 61, 118, 183]. A poor flavour[106]. The fruit looks like a small plum but is very bitter with an almond flavour[11]. The fully ripe fruit loses most of its bitterness[256]. The fruit only has a thin layer of flesh[200]. The fruit can be dried and stored for winter use[257]. Some caution is advised, see the notes above on toxicity.

Medicinal Uses

Laxative Poultice TB The bark is mildly laxative[257]. A decoction has been used in the treatment of tuberculosis[257]. A poultice of the chewed burned plant, mixed with oil, has been used to treat sore parts of the body[257].

Known Hazards

Although no specific mention has been found for this plant. it belongs to a family where the leaves, seed (and sometimes also the fruit) often contain significant amounts of hydrogen cyanide. This is the toxin that gives almonds their characteristic flavour and it should only be eaten in very small quantities. Since the fruit of this species is said to have almond-scented fruit it would be unwise to eat a large quantity of it. In small quantities, hydrogen cyanide has been shown to stimulate respiration and improve digestion, it is also claimed to be of benefit in the treatment of cancer. In excess, however, it can cause respiratory failure and even death.