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Searsia lancea - (L.f.) F.A.Barkley

Common Name African Sumac
Family Anacardiaceae
USDA hardiness 8-11
Known Hazards The pollen is said to be allergenic[1212 ].
Habitats Savannahs, open woodlands and riverine forests at 100 - 2,300 metres[308 ]. An understorey tree is in Acacia woodland along drainage lines, rivers, and streams. It is often found growing on lime-rich substrates[295 ].
Range Southern Africa - Malawi, Namibia, Botswana, Zimbabwe, Mozambique and S. Africa.
Edibility Rating    (2 of 5)
Other Uses    (3 of 5)
Weed Potential Yes
Medicinal Rating    (2 of 5)
Care (info)
Half Hardy Well drained soil Moist Soil Semi-shade Full sun
Searsia lancea African Sumac


JMK. Creative Commons Attribution-Share Alike 3.0 Unported license.
Searsia lancea African Sumac
Creative Commons Attribution 4.0 International license.

 

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Summary

African Sumac (R. lancea/Searsia lancea) is native to Southern Africa. Although the fruit is technically edible, the plant is more commonly used as a large hedge along the boundaries of properties such as farms because of its dense growth habit. African Sumac's density makes it suitable as a screen or barrier against wind, noise, or objectionable views. It stabilises natural soil and increases rainwater infiltration into the soil, thus reducing erosion and raising the groundwater table. Rhus lancea L.f. is a synonym of Searsia lancea.


Physical Characteristics

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Searsia lancea is an evergreen Tree growing to 5 m (16ft) by 5 m (16ft) at a medium rate.
See above for USDA hardiness. It is hardy to UK zone 9 and is not frost tender. The flowers are pollinated by Bees, Insects. The plant is self-fertile.
It can fix Nitrogen.
It is noted for attracting wildlife.
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 and can grow in saline soils.
It can grow in semi-shade (light woodland) or no shade. It prefers dry or moist soil and can tolerate drought. The plant can tolerates strong winds but not maritime exposure.

UK Hardiness Map US Hardiness Map

Synonyms

Rhus lancea L.f. Toxicodendron lanceum (L.f.) Kuntze

Plant Habitats

Edible Uses

Fruit[423 ]. The fruit has been fermented to make a beer[423 ]. The fruit is a small round, glossy tan drupe, 4 - 6mm in diameter, in a hanging many branched cluster[1212 ]. The berries are typically harvested in late summer to early autumn, when they are fully ripe. Sumac generally flowers in early to mid-summer.

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.


The roots, leaves and stem bark treat skin diseases[299 ]. A root infusion treats abdominal and chest complaints and diarrhoea[299 ]. The roots are chewed as a treatment against stomachache [299 ]. A leaf decoction or infusion treats measles and pustules[299 ]. The vapours from leaves in a hot water bath are inhaled to cure cough[299 ]. Bark extracts have shown in-vitro antibacterial activity against many gram-positive and gram-negative bacteria[299 ]. The leaves yield 0.2% of essential oil, with a-pinene, benzene and d-3-carene as main constituents. The oil showed remarkable anti-oxidant activity and dose-dependent antibacterial and antifungal activities. These activities may be associated with the high concentration of a-pinene in the oil (87%).[299 ].

References   More on Medicinal Uses

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Other Uses

Commonly used as a shade tree, windbreak, or ornamental plant in water-wise gardens. Its dense canopy makes it an excellent choice for erosion control and urban landscaping. Agroforestry Uses: Searsia lancea (Rhus lancea) is suitable as a large hedge along the boundaries of properties such as farms because of its dense growth habit[295, 317 ]. The density of the plant makes it suitable for use as a screen or barrier against wind, noise or objectionable views, as well as to provide privacy[295 ]. Searsia lancea helps stabilise natural soil and increase rainwater infiltration into the soil, thus reducing erosion and raising the groundwater table[295 ]. The tree has no aggressive root system and can be used near paving and tarred surfaces[295 ]. Because the karee is hardy, frost-resistant and evergreen, it is ideal for establishing a protective canopy for frost-sensitive and shade-loving plants. It is thus a possible pioneer plant for establishing a new forest in an area that receives frost[295 ]. The plant is considered an indicator of underground water[299 ]. Other Uses: The bark, twigs and leaves are sources of tannin[295 ]. A brown dye is obtained from the bark[299 ]. The reddish-brown wood is fine textured, heavy, hard, tough and durable[299 ]. It has a sweetish and spicy smell, works well and takes a nice polish. It is used for fence posts, tool handles and parts of wagons[295, 299 ]. Bowls, tobacco pipes and bows were also made from the wood[295 ]. Nectary - Flowers rich in nectar and pollen: Sumac flowers produce nectar and pollen, attracting pollinators such as bees, wasps, and butterflies. Wildlife - Food (Fruit, Seeds, Leaf litter, Shelter, Nesting, Roosting): Sumac provides food for wildlife through its clusters of red, berry-like fruits, which birds and small mammals eat. The dense, shrubby form also offers shelter and nesting sites for birds. Invertebrate Shelter (Overwintering sites, Leaf litter, Groundcover): Sumac’s fallen leaf litter provides habitat for invertebrates, and its dense structure can provide shelter for overwintering insects and Groundcover. Pest Confuser (Smell): Sumac does not have a strong aromatic smell commonly used to confuse or repel pests.

Special Uses

References   More on Other Uses

Cultivation details

Soil Texture: It grows well in light (sandy), medium (clay), and heavy (clay) soils and is highly adaptable to various soil types, including poor or rocky soils. Soil Moisture: Prefers dry to moderately moist soils. It is drought-tolerant once established but does not thrive in waterlogged conditions. Drainage: Requires well-drained soil, though it can tolerate heavier soils if adequate drainage. Soil pH: Tolerates various pH levels, from acidic to alkaline soils. Saline Tolerance: Moderately tolerant of saline conditions, making it suitable for semi-arid and coastal environments. Tolerance of Poor Soil: It thrives in poor and nutrient-deficient soils, particularly in arid and semi-arid conditions. Light Requirements: Requires full sun for optimal growth but can tolerate partial shade. Height: It typically grows to about 6–9 meters (20–30 feet) tall, with a dense, rounded crown. Pollination: insects, including bees, are attracted to its small, inconspicuous yellowish-green flowers. Temperature: Hardy in USDA zones 8–11, tolerating high heat and mild frost. Ideal for arid, semi-arid, and Mediterranean climates. Drought Tolerance: Extremely drought-tolerant once established, making it an excellent choice for xeriscaping. Wind Tolerance: Highly wind-resistant, making it suitable for windbreaks. Pests and Diseases: Generally pest-resistant and disease-free, though it may occasionally be affected by scale insects or sooty mould in humid conditions. Pruning: Requires minimal pruning, but shaping can be done to maintain its appearance. Regularly remove dead wood and lower branches for better airflow. Searsia lancea is not very cold-tolerant but can tolerate occasional temperatures falling to around -5 to -10°c when dormant so long as the branches have been fully ripened by a hot summer[295, 1212 ]. Requires a sunny position[423 ]. Succeeds in poorly drained soils[295 ]. Established plants are drought resistant[295 ]. Rhus lancea is often cultivated as an ornamental in the southwestern United States, where it is not only well established (and generally valued) as a landscape tree but has become naturalised and could threaten natural ecosystems, especially desert washes[1212 ]. The tree can grow up to 80cm a year, thus fairly fast growing[295 ]. The dark reddish brown bark has a sweet, spicy scent[1212 ]. A dioecious species, both male and female forms must be grown if fruit and seed are required. The native range of this species is Zambia to S. Africa. It is a tree and grows primarily in the desert or dry shrubland biome. It has been introduced in California and Pakistan [2-5]. Sumac species typically grow at a moderate pace, reaching maturity within a few years, and can establish rapidly in suitable conditions.

References   Carbon Farming Information and Carbon Sequestration Information

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Plant Propagation

Seed—The ripe seed should be sown in trays using a good seedling medium and transplanted into bigger containers when the seedlings reach the two-leaf stage[295 ]. Cuttings can be taken using young growth. Layering.

Other Names

If available other names are mentioned here

African Sumac, karee (archaically karree). Willow rhus.

Native Range

Native to: Botswana, Cape Provinces, Free State, Lesotho, Myanmar, Namibia, Northern Provinces, Zambia, and Zimbabwe.

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

In Australia, Willow rhus has been found in far western New South Wales, where it is outcompeting native plants. It also poses problems for septic systems, which have extensive root systems. Willow rhus grows from seeds and can sucker from the roots. It is both drought and frost-resistant.

Conservation Status

IUCN Red List of Threatened Plants Status : Least Concern

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Author

(L.f.) F.A.Barkley

Botanical References

Links / References

For a list of references used on this page please go here
A special thanks to Ken Fern for some of the information used on this page.

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