Showy Mountain Ash

Sorbus decora

Physical Characteristics

Sorbus decora is a deciduous Tree growing to 10 m (32ft) by 8 m (26ft). See above for USDA hardiness. It is hardy to UK zone 2. It is in flower from May to June. 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

North-eastern N. America - Labrador and Newfoundland to Quebec, south to Iowa and Maine.

Habitats

Woodland Garden Canopy; Secondary; Sunny Edge;

Edible Uses

Edible Parts: Fruit Edible Uses: Fruit - raw or cooked in preserves etc[183]. The taste is best after a frost[101]. The fruits are about 7 - 10mm across and are borne in dense clusters[200].

Medicinal Uses

Analgesic Antirheumatic A decoction of the inner bark, taken from the stem base, has been used as a wash and poultice in the treatment of rheumatism[257]. The decoction can also be taken internally in the treatment of a backache[257]. A decoction of the peeled stems has been drunk in the treatment of backaches[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.