Sitka Mountain Ash, Western mountain ash

Sorbus sitchensis

Physical Characteristics

Sorbus sitchensis is a deciduous Shrub growing to 1.8 m (6ft) at a slow rate. See above for USDA hardiness. It is hardy to UK zone 5. It is in flower in May. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil. The plant can tolerates strong winds but not maritime exposure.

Distribution

Western N. America - Alaska to California, east to Idaho and Montana.

Habitats

Woodland Garden Sunny Edge;

Edible Uses

Edible Parts: Fruit Edible Uses: Fruit - raw or cooked in pies, preserves etc[62, 105, 161, 183]. Of poor quality[256]. The fruit turns sweeter and so tastes best after a frost[101]. The fruit is produced in clusters, each fruit being about 6 - 12mm in diameter[229].

Medicinal Uses

Antirheumatic Enuresis Kidney Parasiticide Stomachic An infusion of the branches has been given to young children with bed-wetting problems[257]. An infusion of the root and branch bark has been drunk in the treatment of stomach problems and rheumatism[257]. The infusion can also be used externally as a bath for treating rheumatism[257]. A decoction of the root and branch bark has been used as an eyewash[257]. The bark has been chewed in the treatment of colds[257]. An infusion of the branches has been used in the treatment of weak kidneys in order to stop the frequent urination[257].

Known Hazards

The seeds probably contain hydrogen cyanide. This is the ingredient that gives almonds their characteristic flavour. Unless the seed is very bitter it should be perfectly safe in reasonable quantities. 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.