Overview
Rhus angolensis Engl., commonly known as the Angolan sumac, is a plant species in the family of Anacardiaceae. The tree is native to several African countries, including Angola, Botswana, Namibia, and Zimbabwe. Rhus angolensis has various uses in medicine, veterinary sciences, and horticulture.
Description
Rhus angolensis is a deciduous or semi-deciduous tree that reaches a height of up to 4 meters. The tree has an open and spreading canopy with a grey or light-brown bark, which is smooth on young trees, but becomes rougher and darker with age. The leaves are pinnately compound, with up to 19 leaflets that are obovate, oblong or elliptical, measuring between 15-35 mm long. The tree produces small yellow or greenish-yellow flowers, which grow in clusters on axillary panicles and are followed by small, reddish-brown drupes.
Common names
The tree is known by several common names, including the Angolan sumac, the redcurrant tree, and the sourberry tree, among others.
Uses
The tree has various medicinal and veterinary applications. The leaves and bark have been traditionally used in African countries for treating gastrointestinal ailments, skin inflammations, fever, and wounds. The tree's bark has astringent properties and is also used as a substitute for tanning leather. In veterinary sciences, the bark has been used to treat diarrhoea, gastroenteritis, and tapeworm infestations in animals. In horticulture, Rhus angolensis is grown for its ornamental value, with its attractive reddish bark and colorful foliage.
Growth Conditions for Rhus angolensis Engl.
Rhus angolensis Engl., commonly known as the Angola sumac or gum sumac, is a shrub that is native to southern Africa. This plant belongs to the Anacardiaceae family and is well adapted to hot and dry conditions. Below are the specific growth conditions that are conducive to the growth of Rhus angolensis.
Light Requirements
Rhus angolensis requires full sunlight in order to grow and thrive. This plant requires at least six hours of direct sunlight per day for optimal growth. When grown under shaded conditions, Rhus angolensis tends to have a spindly growth and may not produce as many flowers or fruits as plants grown under full sun.
Temperature Requirements
As a shrub that is adapted to hot, dry climates, Rhus angolensis can tolerate high temperatures of up to 40°C. However, during the winter period, the plant is able to withstand low temperatures of up to -5°C. Extreme temperatures beyond this range may lead to the failure of the plant. Regular watering should be provided to the plant to help it survive hot and dry periods.
Soil Requirements
Rhus angolensis thrives in well-draining soils that are rich in organic matter. The plant requires a sandy or loamy soil texture with a pH level ranging from slightly acidic to slightly alkaline. The plant can also grow in rocky terrain and is drought-resistant.
In conclusion, Rhus angolensis is a hardy shrub plant that is well-suited for hot and dry climates. It requires full sunlight exposure, temperatures ranging from -5°C to 40°C, and well-draining soil to thrive.
Cultivation Methods
Rhus angolensis Engl. is a small tree that grows up to a height of 5-7 meters. It is native to the African continent, mainly in Angola, Botswana, Namibia, and Zimbabwe. It is well known for its attractive foliage and medicinal properties.
The plant grows well in sandy or loamy soil that is well-drained and slightly acidic. It requires full sun exposure to thrive but can tolerate partial shade. The best time to plant Rhus angolensis Engl. is in the spring when the temperature is warm.
Watering Needs
Like most trees, Rhus angolensis Engl. requires regular watering during its initial growth phase. However, once it is established, it is drought-tolerant and can withstand prolonged periods of dry weather. Water the tree deeply once a week during the first growing season to help it develop deep roots.
Avoid overwatering the plant as it can lead to root rot. Ensure that the soil is moist but not waterlogged. Water the plant early in the morning or late in the evening to minimize water evaporation.
Fertilization
Rhus angolensis Engl. can benefit from occasional fertilization during its growing season. Apply a balanced slow-release fertilizer once a year in the spring.
Alternatively, use organic fertilizer such as compost or manure to add nutrients to the soil. Ensure that the fertilizer is adequately mixed with the soil to prevent damage to the tree's roots.
Pruning
Prune Rhus angolensis Engl. during the dormant season to encourage new growth and remove any damaged or diseased branches. Remove any weak or crossing branches to create an open canopy that allows proper air and light penetration.
Use clean and sharp pruning tools to prevent injuries to the tree. After pruning, apply a tree wound dressing to prevent pests and disease infections.
Propagation of Rhus angolensis Engl.
Rhus angolensis Engl., commonly known as the red currant, is a plant species that belongs to the family Anacardiaceae. It is native to Angola and South Africa and is well-known for its red, edible fruits. Propagation of Rhus angolensis can be done through various methods:
Seed Propagation
Seed propagation is the most common method used to propagate Rhus angolensis. The seeds should be sown in well-drained soil during spring or summer. The seedlings should be kept moist and in a partially shaded area until they reach a height of about 10cm. They can then be transplanted into their permanent position in the garden.
Cuttings Propagation
Cuttings can also be used to propagate Rhus angolensis. Hardwood cuttings taken at the end of winter or early spring are ideal and should be at least 30cm in length. The cuttings should be dipped in rooting hormone and placed in well-drained soil. The soil should be kept moist and the cuttings should be kept in a partially shaded area until they form roots and new growth.
Suckers Propagation
Rhus angolensis can also be propagated through suckers. These can be taken from the base of an established plant and transplanted into their permanent position. Suckers should be planted in well-drained soil and should be kept moist and in a partially shaded area until they become established.
Overall, propagation of Rhus angolensis requires little effort and is an easy process. The seeds, cuttings and suckers should be kept moist and in a partially shaded area until they take root and become established. Once established, Rhus angolensis requires little maintenance and is therefore a popular plant choice for gardeners.
Disease Management
Rhus angolensis Engl. is prone to several diseases that can impact its growth and production. Here are some common diseases and ways to manage them:
- Anthracnose: This fungal disease can cause leaf spots and defoliation. To manage it, remove infected plant debris and avoid overhead irrigation. Use fungicides to prevent the spread of the disease.
- Crown rot: This disease affects the roots and stems of the plant, causing wilting and plant death. Avoid overwatering and waterlogging, ensure proper drainage, and remove infected plants and soil. Use fungicides to prevent the spread of the disease.
- Leaf rust: This fungal disease can cause yellow-orange spots on leaves and leaf drop. It spreads rapidly in wet conditions. Remove infected plant debris, avoid overhead irrigation, and use fungicides to prevent the spread of the disease.
Pest Management
Aside from diseases, Rhus angolensis Engl. is also affected by pests that can cause damage to the plant. Here are some common pests and ways to manage them:
- Aphids: These insects can cause stunted growth and distorted leaves. Use insecticidal soap or neem oil to manage them or introduce natural predators such as ladybugs.
- Caterpillars: These pests can defoliate the plant. Use Bacillus thuringiensis (Bt) or spinosad to manage them or remove them by hand.
- Scale insects: These pests can cause yellowing and premature leaf drop. Use neem oil or horticultural oil to manage them, or remove them by hand.
