Prunus emarginata

Prunus emarginata

The bitter cherry or Oregon cherry (Prunus emarginata (Dougl. ex Hook.) Eaton) is a tree species belonging to the Rosaceae family.

Systematics –
Domain Eukaryota,
Kingdom Plantae,
Suborder Tracheobionta,
Superdivision Spermatophyta,
Division Magnoliophyta,
Class Magnoliopsida,
Subclass Rosidae,
Order Rosales,
Family Rosaceae,
Subfamily Amygdaloideae,
Tribe Amygdaleae,
Genus Prunus,
Species P. emarginata
The following terms are synonymous:
– Cerasus emarginata Douglas (basionimo)
– Prunus emarginata (Douglas) Eaton
• var. crenulata (Greene) Kearney & Peebles
– Cerasus crenulata Greene
– Prunus crenulata (Greene) Tidestr.
• subsp. mollis (Douglas) A.E. Murray
– Cerasus mollis Douglas
– Prunus emarginata var. mollis (Douglas) W.H. Brewer
– Prunus pensylvanica var. mollis (Douglas) B. Boivin
Two varieties are recognized within this species:
– Prunus emarginata var. emarginata. Usually shrubby; young shoots and leaves are glabrous or only slightly hairy. It represents most of the species’ range.
– Prunus emarginata var. mollis (Dougl.) Brew. A larger tree; young shoots and leaves are pubescent. The bark is reddish-brown with light horizontal bands similar to those of birch.[5] From Oregon north to British Columbia, mainly along the coast.

Etymology –
The genus name Prunus derives from the ancient Greek word prounē, later adopted by Latin as prunus, the word used by classical authors to refer to the plum tree. The specific epithet emarginata means “with a toothed margin” and refers to the characteristic shape of the leaves, whose edges have clearly visible serrations.

Geographic distribution and habitat –
The bitter cherry is a species native to western North America. Its range extends from British Columbia to Baja California and New Mexico, reaching eastward to Wyoming and the Rocky Mountains.
It is a typical plant of open, bright environments, where it easily colonizes land recently disturbed by fires, landslides, or deforestation. It grows along waterways, on rocky slopes, in sparse woodlands, and on forest edges, preferring fertile, nutrient-rich soils. It can grow from sea level to about 3,000 meters above sea level, demonstrating a remarkable capacity for adaptation. This ability to rapidly occupy open spaces makes it one of the most important pioneer species in the forest ecosystems of the North American Pacific coast.

Description –
Prunus emarginata is a deciduous shrub or small tree that typically reaches a height of one to fifteen meters, although in favorable areas it can grow much taller. The trunk is slender and covered with smooth gray or reddish-brown bark, easily recognizable by its characteristic horizontal lenticels.
The leaves are oval, thin, and yellowish-green, with finely serrated edges, which gave the species its name. In spring, small, white flowers appear in clusters and have an almond-like scent, attracting numerous pollinating insects. When ripe, they produce small red or purple drupes, very juicy but characterized by a decidedly bitter taste.
In addition to propagating by seed, the plant produces numerous suckers from the roots, forming dense bushes that help consolidate the soil. In autumn, the foliage turns a bright yellow, making the species also interesting from an ornamental perspective.

Cultivation –
The bitter cherry is a hardy plant and relatively easy to grow. It prefers sunny locations, where it produces more abundant fruit, but can also grow in partial shade. It thrives in well-drained, fresh, and organically rich soils, tolerating a moderate amount of limestone, provided it is not excessive.
It is a fairly fast-growing species but relatively short-lived. It tolerates fires well, from which it quickly re-emerges thanks to suckers that develop from the base of the plant. However, it suffers from competition from larger trees and excessive shade.
Propagation is primarily by seed, which requires a period of cold stratification before germination. The plant can also be propagated by cuttings or layering. Thanks to its ability to rapidly colonize degraded areas and stabilize the soil with its root system, it is frequently used in environmental restoration and erosion control projects.

Uses and Traditions –
Despite the extremely bitter flavor of its fruit, Prunus emarginata played an important role in the culture of many indigenous peoples in North America. Some communities considered cherries a valuable food resource, consuming them fresh or making jellies, while others used them only occasionally due to their intense bitterness.
Even more significant was their use in traditional medicine. The bark and roots were used to prepare infusions and decoctions to treat heart conditions, colds, eczema, and tuberculosis. The bark was also attributed tonic, purifying, and laxative properties, while poultices made from it were applied to swellings and wounds.
The plant was also widely used in everyday life. The tough yet flexible bark was used to weave waterproof baskets, make ropes, coat tools, and create numerous everyday objects. Natural dyes were also obtained from the foliage and fruit, while the wood, although soft, was used for small artifacts and as an excellent fuel.

Preparation and Use –
The ways in which the bitter cherry tree was used were numerous and varied from one population to another. The bark was primarily prepared in the form of infusions and decoctions, used as traditional remedies for various ailments, or transformed into poultices to be applied directly to the skin. The fruits, when harvested, were eaten fresh, cooked, or made into jellies, despite their very intense flavor.
Other uses were even more unusual: the ash from the bark was applied to the skin of newborns to prevent irritation, while the bark itself could be chewed during childbirth according to some traditions. The roots were sometimes held in the mouth as a remedy for canker sores or used to promote breastfeeding.
It is important to remember that the plant contains cyanogenic glycosides, particularly in the seeds and young shoots. These substances can release cyanide during digestion and are toxic if ingested in large quantities. For this reason, the seeds should not be consumed, especially when they have a strongly bitter taste, and the medicinal uses described belong exclusively to the ethnobotanical tradition and do not constitute modern therapeutic indications.

Guido Bissanti

Sources
– Acta Plantarum – Flora of the Italian Regions.
– Wikipedia, the free encyclopedia.
– GBIF, the Global Biodiversity Information Facility.
– Useful Tropical Plants Database.
– Conti F., Abbate G., Alessandrini A., Blasi C. (eds.), 2005. An annotated checklist of the Italian vascular flora, Palombi Editore.
– Pignatti S., 1982. Flora of Italy, Edagricole, Bologna.
– Treben M., 2000. Health from the Lord’s Pharmacy, Advice and Experiences with Medicinal Herbs, Ennsthaler Editore.

Photo source:
– https://www.treesandshrubsonline.org/articles/prunus/prunus-emarginata/

Warning: The pharmaceutical applications and dietary uses are provided for informational purposes only and do not in any way constitute medical prescriptions. We therefore decline any responsibility for their use for curative, aesthetic, or nutritional purposes.