Curtisia | |
---|---|
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Cornales |
Family: | Curtisiaceae Takht. [2] |
Genus: | Curtisia Aiton |
Species: | C. dentata |
Binomial name | |
Curtisia dentata | |
Curtisia dentata (commonly known as the Assegai tree or Cape lancewood, Afrikaans : Assegaai, Xhosa : Umgxina, Zulu : Umagunda) [5] is a flowering tree from Southern Africa. It is the sole species in genus Curtisia, which was originally classed as a type of "dogwood" (Cornaceae), but is now placed in its own unique family Curtisiaceae.
It is increasingly popular as an ornamental tree for gardens, with dark glossy foliage and sprays of pure white berries. The bark of this tree is a very popular component of traditional African medicine, leading to overexploitation and a decline in the species in some areas of South Africa. [6] The tree is protected in South Africa. [5]
This tree gets its common name from the African spear – the Zulu Assegai – which was traditionally made from this tree's strong wood. The Zulu would intentionally damage the tree's main trunk, causing the tree to coppice from its base. The straight, strong shoots of the coppice were used for the shafts of the spears.
Its genus name, "Curtisia", is from the botanist William Curtis (founder of The Botanical Magazine ) and "dentata" is simply the Latin for "toothed", referring to the slightly serrated margins of its leaves.
A medium to tall evergreen tree (up to 15 m (49 ft) in height), usually immediately recognizable due to the striking contrast between its dark, glossy foliage and its sprays of cream-white berries. It has a clean, unbuttressed bole and the bark is smooth and grey or cinnamon-coloured. The leaves have pointed tips and toothed edges, and are arranged in opposite pairs. The leaf surface is smooth and dark glossy green, while the stalks and the twigs are covered in silky reddish hair. Very young growth is also velvety to the touch and bronze-gold in colour. The tiny flowers are cream-coloured and velvety, but relatively inconspicuous.
The tree bears dense clusters of small, white berries. They generally appear in winter and are pure white (sometimes tinged with pink or red). They remain on the tree for a long time and can be very decorative.
The Assegai tree grows in the forests of South Africa and Eswatini, ranging from sea level to 1,800 m (5,900 ft) elevation, and from Cape Town in the south to Limpopo province in the north. It also grows in Afromontane forest in the Eastern Highlands along the border of Zimbabwe and Mozambique, and Mount Gorongosa in Mozambique. [1] In deep Afromontane forest it grows into a tall tree, but on open mountain slopes and by the coast it remains a small bushy tree. Curtisia has been in decline in some areas, as its bark is highly valued for traditional medicine. It is now a Protected Tree in South Africa.
The Assegai tree is attractive, fast-growing and hardy. When planted alone, it grows into a shapely, evergreen tree. Planted in a row it makes an attractive, tall, leafy hedge and it grows especially dense and bushy when planted in the sun. However, it can be grown in light shade as well as full sun, and its roots are non-invasive so it can also be planted near to buildings. It does not create much leaf litter, and it is storm-firm due to its deep roots and tough branches. The tree's edible (but bitter) berries also attract birds to the garden.
The bark of this tree is widely used as a traditional medicine for curing stomach ailments and diarrhoea. It is also reputed to be an aphrodisiac. Due to this, the tree is often overexploited and even effectively exterminated from some parts of the country.
The Assegai is best propagated by seed. Remove the fleshing covering of its white berries and plant them in moist soil. Germination takes a few weeks and seedlings grow rapidly, though they should be kept well-watered and out of direct sunlight. It is sensitive to frost and drought, although established trees can survive both. [7]
Podocarpus latifolius is a large evergreen tree up to 35 m high and 3 m trunk diameter, in the conifer family Podocarpaceae; it is the type species of the genus Podocarpus.
An assegai or assagai is a polearm used for throwing, usually a light spear or javelin made up of a wooden handle with an iron tip.
Boscia albitrunca, commonly known as the shepherd tree or shepherd's tree, is a protected species of South African tree in the caper family. It is known for having the deepest known root structure of any plant at 68 metres (223 ft).
Podocarpus elongatus, the Breede River yellowwood, is a species of conifer in the family Podocarpaceae. In contrast to other yellowwood species of southern Africa, Podocarpus elongatus often resembles an enormous, round, multi-stemmed bush in its habit. The Breede River yellowwood is a protected tree in South Africa.
Vangueria infausta, the medlar or African medlar, is a species of plant in the family Rubiaceae, which is native to the southern and eastern Afrotropics. Some other names for V. infausta in Southern African languages include mmilo in Northern Sotho, muzwilu in Venḓa, umviyo in Southern Ndebele, mothwani in Tswana and umtulwa in Zulu.
Brabejum is a genus of a single species of large evergreen tree, Brabejum stellatifolium in the family Proteaceae, commonly called wild almond, bitter almond or ghoeboontjie. It is restricted in the wild to South Africa's Western Cape province, where it grows in thickets along the banks of streams. The plant is of botanical interest as being Africa's only member of the large grevilleoid subfamily. It is a bushy small tree with branches widely at ground level and numerous erect vigorous stems. Leaves grow up to 6 in (15 cm) long, narrow and bluntly toothed, appear at intervals along the branches, mostly in whorls of 6. In summer, the plant bears white flowers densely crowded on spikes arising from rusty buds at the leaf axils. The fruits to 2 in (5 cm) long, magenta to reddish brown, similar to an almond, appear in autumn. The nut is too bitter to eat; however, in earlier times it was boiled, roasted, and ground to make a "coffee" drink.
Celtis africana, the white stinkwood, is a deciduous tree in the family Cannabaceae. Its habit ranges from a tall tree in forest to a medium-sized tree in bushveld and open country, and a shrub on rocky soil. It occurs in Yemen and Somaliland and over large parts of Africa south of the Sahara. It is a common tree in the south and east of southern Africa, where the odour given off by freshly-cut green timber is similar to that of Ocotea bullata or black stinkwood.
Deinbollia oblongifolia is a shrub or small tree in the family Sapindaceae. It is commonly known as the dune soap-berry and is found in coastal vegetation from the Eastern Cape of South Africa, through KwaZulu-Natal to southern Mozambique and Eswatini. It is named after Peter Vogelius Deinboll (1783–1876), a Danish botanist and plant collector.
Cunonia capensis, the butterspoon tree, butterknife tree, African red alder, red alder or rooiels, is a small tree found in the afromontane forests of southern Africa, and along rivers. It is grown as an ornamental in gardens for its attractive glossy foliage and its clusters of tiny, scented, white flowers. It is the only one of 24 species of Cunonia to occur outside of New Caledonia in the Pacific.
Myrsine melanophloeos, commonly known as Cape beech, Kaapse boekenhout (Afrikaans), isiCalabi (Zulu) or isiQwane sehlati (Xhosa) is a dense evergreen tree that is native to the afromontane forests of Africa, ranging from Nigeria and Sudan to South Africa. Outside forests they are also commonly encountered along stream banks and in gullies.
Apodytes dimidiata is a bushy tree with white flowers bearing a fragrance reminiscent of fresh coconut, and small black and red fruits. It is usually about 5 m tall, and it is indigenous to Southern Africa. The taxonomical family placement for this and other Apodytes was uncertain; it is now placed in the Metteniusaceae. Its English common name is in reference to the timber which is similar in appearance to that of the European pear tree of the northern hemisphere.
Cassine peragua, also known as Cape saffron, bastard saffron and forest spoonwood, is a medium-sized tree with fragrant flowers, decorative fruits and a saffron-coloured trunk. It is indigenous to the Afro-montane forests of South Africa.
Chionanthus foveolatus, commonly known as the pock ironwood or bastard ironwood, is a medium-sized, evergreen, Afromontane tree that is native to South Africa, Eswatini and Malawi.
Pterocelastrus tricuspidatus, commonly called candlewood, cherrywood or kershout, is a medium-sized evergreen tree, indigenous to South Africa.
Rhoicissus tomentosa is a vigorous, evergreen vine that is indigenous to the afro-montane forests of southern Africa. It is increasingly popular as an ornamental creeper in gardens, and it has a wide range of uses in traditional medicine.
Southern Afrotemperate Forest is a kind of tall, shady, multilayered indigenous South African forest. This is the main forest-type in the south-western part of South Africa, naturally extending from the Cape Peninsula in the west, as far as Port Elizabeth in the east. In this range, it usually occurs in small forest pockets, surrounded by fynbos vegetation.
Croton gratissimus, is a tropical African shrub or small tree with corky bark, growing to 8 m and belonging to the family of Euphorbiaceae or spurges. Young twigs are slender and angular and covered in silver and rust-coloured scales.
Diospyros dichrophylla (Gand.) De Winter is a Southern African tree belonging to the ebony family of Ebenaceae and closely related to the Persimmon.
Combretum apiculatum is a species of tree in the family Combretaceae known by the common name red bushwillow. It is native to the mesic to semi-arid savanna regions of Africa, southwards of the equator.
Allophylus natalensis, commonly known as the dune false crowberry or dune false currant, is a species of plant in the genus Allophylus native to south-eastern Africa.