The Manna Ash (Fraxinus ornus) is a medium-sized deciduous tree native to southern Europe and southwestern Asia, distinguished from other ash species by its showy, fragrant white flower plumes that appear in May after the leaves emerge — a striking contrast to the inconspicuous flowers of most other ashes. Its most famous attribute, however, is the sweet, sugary sap that exudes from cuts in the bark, known since antiquity as "manna" and used as a mild laxative and sweetener for thousands of years.
• Reaches 15 to 20 meters tall with a rounded, spreading crown
• The only ash species with showy, fragrant white flowers in conspicuous plumes
• Produces the sugary sap known as "manna" since biblical times
• Native to southern Europe and the Mediterranean region
• More ornamental than most ash species, with attractive flowers and good fall color
• Ranges from Spain and southern France eastward through Italy, the Balkans, and Greece to Turkey, Syria, and the Caucasus
• Also found on the Mediterranean islands of Sicily, Corsica, and Crete
• Found at elevations from sea level to approximately 1,200 meters
• Grows in mixed deciduous forests, often on dry, calcareous hillsides and rocky slopes
• Particularly common in thermophilous (heat-loving) oak and ash woodlands in the Mediterranean region
• Described by the Swedish botanist Carl Linnaeus in 1753
• The species name "ornus" is the classical Latin name for this tree
• Manna has been harvested from this tree in Sicily since at least the Middle Ages
• Has naturalized in parts of northern Europe, Britain, and eastern North America
Bark:
• Gray, smooth when young, developing shallow fissures and scaly plates with age
Leaves:
• Opposite, pinnately compound with 5 to 9 (usually 7) leaflets, 15 to 25 cm long overall
• Each leaflet 5 to 10 cm long, ovate to lanceolate, with sharply toothed margins
• Dark green above, paler and slightly hairy beneath
• Fall color is yellow to reddish-purple, often showy
Flowers:
• Showy, fragrant, creamy-white, in dense, branched panicles 10 to 20 cm long
• Appear in May after the leaves emerge, creating a spectacular display
• Unlike most ashes, which are wind-pollinated with inconspicuous flowers, Manna Ash is insect-pollinated
Fruit:
• Oar-shaped samaras, 2 to 3 cm long
Size:
• Typically 15 to 20 meters tall and 30 to 50 cm trunk diameter
• Adapted to the hot, dry summers and mild, wet winters of the Mediterranean climate
• Often grows on dry, rocky, calcareous hillsides where few other trees thrive
• Flowers are pollinated by insects, particularly beetles and flies, unlike most ash species which are wind-pollinated
• The showy flowers provide an abundant nectar source for bees and other pollinators in late spring
• Seeds are consumed by birds and small mammals
• Shows some resistance to ash dieback disease compared to European Ash
• Can hybridize with European Ash (Fraxinus excelsior) where their ranges overlap
• Has become invasive in some areas outside its native range, including parts of the United States and Australia
• Widespread and common across southern Europe and the Mediterranean
• Less affected by ash dieback than European Ash
• Some local populations may be affected by habitat loss and overgrazing
• Manna harvesting has declined dramatically, reducing the economic incentive to maintain managed stands
• The species is well-represented in cultivation and botanical gardens
• Hardy in USDA zones 6 to 9
• Prefers well-drained, calcareous to neutral soils
• Tolerates drought, heat, and poor, rocky soils
• Best in full sun
• Moderate growth rate of 30 to 45 cm per year
• Valued as an ornamental for its showy white flower plumes
• 'Meczek' is a popular compact, rounded cultivar
• More heat-tolerant than European Ash
• Relatively resistant to ash dieback
• Excellent specimen tree for Mediterranean-style gardens
Manna production:
• Sweet, sugary sap (manna) exudes from cuts made in the bark during summer
• Manna has been harvested commercially in Sicily since the Middle Ages
• Traditionally used as a mild laxative (due to the sugar alcohol mannitol) and as a sweetener
• Manna was mentioned in the Bible and ancient medical texts
• Production is now limited to small-scale operations in Sicily
Ornamental:
• One of the most attractive ash species for landscape use
• Showy white flower plumes in May are unique among ashes
• Good fall color from yellow to reddish-purple
• 'Meczek' and other compact cultivars are popular in European gardens
Timber:
• Wood is similar to European Ash but from smaller trees
• Used locally for tool handles and small woodworking
Anecdote
The Manna Ash produces one of the most unusual substances in the plant kingdom: a sweet, sugary sap called "manna" that oozes from cuts in the bark during the heat of summer. The sap, which is rich in the sugar alcohol mannitol, has been harvested in Sicily for over 500 years by making precise longitudinal cuts in the bark and collecting the dried, crystalline sap. The word "manna" comes from the Hebrew and has been used since biblical times, though the biblical manna was almost certainly a different substance.
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