Mastic (Pistacia lentiscus) is an evergreen shrub or small tree belonging to the family Anacardiaceae, best known for producing a precious aromatic resin that has been harvested for thousands of years. Native to the Mediterranean Basin, this hardy plant is a defining species of the maquis shrubland ecosystem and has played a significant role in the culinary, medicinal, and cultural traditions of the region. The resin, known as "mastic" or "Chios tears," is harvested by making small incisions in the bark, allowing the clear, translucent droplets to harden into brittle, pear-shaped lumps that turn pale yellow with age. Mastic has been called "the tears of Chios" because the finest quality resin has been produced on the Greek island of Chios for millennia, and it remains one of the world's most storied and valuable plant resins.
• The genus Pistacia comprises approximately 10–20 species, distributed across the Mediterranean, Central Asia, and parts of North America
• Pistacia lentiscus is the most widespread and ecologically dominant Pistacia species in the Mediterranean maquis
• The species has been cultivated and semi-cultivated on the Greek island of Chios for resin production for over 2,500 years
• Mastic resin was one of the earliest traded commodities in the Mediterranean, mentioned in ancient texts from Herodotus to Pliny the Elder
• The plant's evolutionary lineage within Anacardiaceae dates back to the Tertiary period, with fossil evidence of Pistacia-like species found across Europe and North Africa
Trunk & Bark:
• Trunk is stout and gnarled with age, covered in grey-brown bark that becomes fissured and rugged over time
• Inner bark and young branches exude the characteristic aromatic resin (masticha) when cut
• Resin is clear and translucent when fresh, hardening into brittle, pale yellow to amber-colored tears
Leaves:
• Pinnately compound, alternate, with 6–10 leaflets (occasionally up to 14)
• Leaflets are leathery, oblong to elliptic, 1–3 cm long, with entire margins and a slightly winged rachis (a distinguishing feature from the closely related Pistacia terebinthus, which has a non-winged rachis)
• Dark glossy green above, paler beneath; evergreen, persisting 2–3 years
Flowers:
• Small, inconspicuous, apetalous (lacking petals), greenish to reddish
• Arranged in axillary racemes or panicles
• Male and female flowers borne on separate plants (dioecious)
• Male flowers have 3–5 stamens; female flowers have a single pistil
Fruit:
• Small drupe, approximately 4–5 mm in diameter
• Ripens from red to black
• Contains a single seed; primarily dispersed by birds
• Fruits are not commercially significant compared to the resin
Habitat:
• Thrives in coastal and lowland Mediterranean environments, from sea level to approximately 600 meters elevation
• Found on limestone, igneous, and sandy soils; highly tolerant of poor, rocky, and calcareous substrates
• Common in maquis, garrigue, coastal cliffs, and open pine forests
• Extremely drought-tolerant; adapted to hot, dry summers and mild, wet winters
Climate:
• Prefers Mediterranean climate with annual rainfall of 300–800 mm
• Tolerates temperatures from approximately −10°C to over 40°C
• Highly resistant to salt spray and coastal winds
Ecological Role:
• Pioneer species in degraded landscapes; stabilizes soil and prevents erosion
• Provides food and shelter for numerous bird species, which consume and disperse the fruits
• Supports a rich community of insects, including specialized pollinators
• Often co-dominates with Quercus coccifera, Olea europaea (wild olive), Cistus spp., and Arbutus unedo in maquis communities
• Plays a critical role in post-fire regeneration, resprouting vigorously from the root crown after burning
Light:
• Full sun preferred; tolerates partial shade but resin production is reduced
• Requires at least 6 hours of direct sunlight daily for optimal growth and resin yield
Soil:
• Adaptable to a wide range of soil types: sandy, loamy, clay, and rocky
• Tolerates alkaline (calcareous) soils with pH 6.0–8.5
• Excellent drainage is essential; does not tolerate waterlogged conditions
Watering:
• Extremely drought-tolerant once established (after 1–2 years)
• Water regularly during the first growing season to establish roots
• Mature plants require little to no supplemental irrigation
• Overwatering is the most common cause of failure in cultivation
Temperature:
• Hardy to approximately −10°C (USDA zones 8–11)
• Thrives in hot summers; intolerant of prolonged frost and humid tropical conditions
Propagation:
• By seed: requires cold stratification (2–3 months at 2–5°C) to break dormancy; germination rate is moderate
• By semi-hardwood cuttings taken in late summer, treated with rooting hormone
• By grafting onto Pistacia terebinthus rootstock for resin-producing cultivars
Pruning:
• Tolerates heavy pruning; can be shaped as a hedge, topiary, or small tree
• Best pruned in late winter or early spring before new growth
Resin Harvesting (for Chios-type cultivation):
• Trees are typically 5–7 years old before first tapping
• Small incisions ("wounds") are made in the bark with a special tool (kentitiri) during summer (July–August)
• Resin drips onto clean ground beneath the tree and hardens over 2–3 weeks
• Harvest occurs in September–October; resin is then washed and sorted by quality
Culinary:
• Used as a chewing gum (the original "mastic gum") since antiquity
• Key ingredient in Greek, Turkish, and Middle Eastern cuisines: flavoring for breads, pastries, ice cream (especially Turkish dondurma), liqueurs (mastiha liqueur), and confections
• Used in the production of the traditional Greek spirit "mastiha"
• Approved as a food additive (E number not assigned; used as natural flavoring)
Medicinal:
• One of the oldest documented medicinal substances; mentioned by Hippocrates, Dioscorides, and Galen
• Traditionally used for digestive ailments, oral hygiene, and wound healing
• Modern clinical studies have demonstrated antibacterial activity against Helicobacter pylori
• The European Medicines Agency (EMA) has recognized mastic gum as a traditional herbal medicinal product for mild dyspeptic complaints and minor skin inflammation
• Research has shown anti-inflammatory, antioxidant, and hepatoprotective properties
Industrial & Cosmetic:
• Used in high-quality varnishes and lacquers since antiquity (mastic varnish)
• Ingredient in perfumes, soaps, and cosmetics
• Used in dentistry as a component of dental cements and temporary fillings
• Historically used to preserve and protect oil paintings
Cultural:
• UNESCO inscribed the traditional knowledge of mastic cultivation on Chios as an Intangible Cultural Heritage of Humanity in 2014
• The mastic villages (Mastichochoria) of Chios are a unique cultural landscape of fortified settlements dedicated to resin production
Anecdote
Mastic resin holds the distinction of being one of the very first recorded chewing gums in human history. Ancient Greeks, Romans, and peoples of the Eastern Mediterranean chewed mastic tears to freshen breath and clean teeth — a practice that continues to this day on the island of Chios. The word "mastic" itself derives from the Greek "mastichon," which may be related to the verb "mastichao" ("to gnash the teeth"), directly referencing its use as a chewable resin. On the island of Chios, mastic production is governed by a cooperative system dating back to the Genoese occupation (1346–1566). The 24 mastic villages (Mastichochoria) operate under a unique communal structure, and the entire production process — from tapping the trees to cleaning the resin — remains largely manual and unchanged for centuries. A remarkable botanical curiosity: Pistacia lentiscus is a member of the Anacardiaceae family, which includes poison ivy, poison sumac, and cashews. While mastic resin is entirely safe for consumption, the sap of some parts of the plant can cause contact dermatitis in sensitive individuals — a reminder of its kinship with some of the plant world's most notorious irritants. The resin's value was once so great that during the Ottoman period, mastic was worth its weight in gold, and stealing mastic from Chios was punishable by death.
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