River bushwillow | |
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In autumn colours at Tierpoort, Gauteng | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Myrtales |
Family: | Combretaceae |
Genus: | Combretum |
Species: | C. erythrophyllum |
Binomial name | |
Combretum erythrophyllum | |
Synonyms | |
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Combretum erythrophyllum, commonly known as the river bushwillow, is a medium-sized, spreading tree found in bush near or along river banks in southern Africa. It is planted as a shade and ornamental tree in South Africa and the United States, and is propagated by seed. [2]
It is also known as the river combretum, and common names in other languages include riviervaderlandswilg (Afrikaans), umdubu (Zulu) [3] and modubunoka / modubu (Setswana). [4]
It is a small to medium-sized tree 7 to 12 m in height. It has a straight or multi-stemmed bole with a dense spreading crown. It is frost and drought hardy.
The bark is a smooth pale gray or yellow brown that flakes with age to expose pale bark patches with large lumps (note: not galls) which sometimes occur on older trunks and main branches. The coarse wood shows little distinction between sapwood and heartwood. [2]
The leaves are simple, subopposite or in whorls of three, [2] and elliptic with tapering base and apex (50 x 20 mm). The upper surface is usually without hairs, while the under surface has hairs. [5] The petiole is short and stipules are absent. Inconspicuous scales cover both surfaces. [2] The leaf's midrib and lateral veins are very conspicuous. It is deciduous to semi-deciduous, and the leaves turn yellow and red in autumn (the specific name erythrophyllum means red leaf).
The cream or yellowish, bisexual flowers are produced in dense, rounded axillary spikes, about 10 cm in diameter and up to 3 cm long. [2] They appear after the first leaves in spring or early summer.
The 4-winged fruit are yellow to brown in colour and 10 to 15 mm in length.
Found in riverine bush or where there is sufficient ground water in Botswana, Eswatini, Mozambique, South Africa, Zambia and Zimbabwe. [6]
Wasps lay their eggs in the walls of the fruit and the larvae feed on the seeds inside the fruit. The southern black tit taps the fruit to check if there are larvae inside, when discovered they open the fruit and eat the larvae. Combretum erythrophyllum leaves are browsed by giraffe, elephant, bushbuck and nyala. [6]
Acer platanoides, commonly known as the Norway maple, is a species of maple native to eastern and central Europe and western Asia, from Spain east to Russia, north to southern Scandinavia and southeast to northern Iran. It was introduced to North America in the mid-1700s as a shade tree. It is a member of the family Sapindaceae.
Strychnos nux-vomica, the strychnine tree, also known as nux vomica, poison fruit, semen strychnos, and quaker buttons, is a deciduous tree native to India and to southeast Asia. It is a medium-sized tree in the family Loganiaceae that grows in open habitats. Its leaves are ovate and 5–9 centimetres (2–3.5 in) in size. It is known for being the natural source of the extremely poisonous compound strychnine.
Combretum imberbe is a characteristic and often impressive bushwillow species of the southern Afrotropics. The medium to large tree has a sparse, semi-deciduous canopy of grey-green leaves. The twigs and leaves are hairless as the name imberbe suggests. Its heartwood is dark brown, close-grained, and very hard and heavy, as suggested by its vernacular name. The durable heartwood is much sought after in the woodcarving industry. The Hereros and Ovambos of Namibia attach special cultural and religious significance to the tree, as to them it is the great ancestor of all animals and people, which must be passed with respect.
Urtica ferox, commonly known as tree nettle and, in Māori, ongaonga, taraonga, taraongaonga, оr okaoka, is a species of nettle endemic to New Zealand. Unlike the other species in the genus Urtica found in New Zealand, all of which are herbaceous, ongaonga is a large woody shrub that can grow to a height of 3 m (9.8 ft), with the base of the stem reaching 12 cm (4.7 in) in thickness. It has large spines that can result in a painful sting that lasts several days.
Androstachys johnsonii, the Lebombo ironwood, is a medium-sized Afrotropical tree species, and the sole member of the genus Androstachys in the Picrodendraceae. It is slow-growing, evergreen to deciduous, and dioecious, with flowers that are wind-pollinated. It is native to southeastern Africa and Madagascar, where it generally occurs gregariously on rocky hillsides, particularly in hot and dry situations. It produces a hard, durable wood which is of economic interest. Its specific name commemorates W. H. Johnson, a 19th-century Director of Agriculture in Mozambique. Four related species which are native to Madagascar, are usually placed in genus Stachyandra.
Ziziphus mucronata, known as the buffalo thorn, is a species of tree in the family Rhamnaceae, native to southern Africa. It is deciduous and may grow up to 17 metres tall. It can survive in a variety of soil types, occurring in many habitats, mostly open woodlands, often on soils deposited by rivers, and grows frequently on termite mounds. Its Zulu name “umLahlankosi” alludes to its use as a grave marker for tribal chiefs, while the Afrikaans name “Blinkblaar-wag-'n-bietjie” alludes to the shiny light green leaves and the hooked thorns.
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 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.
Millettia grandis is a species of plant in the family Fabaceae from South Africa. It is commonly called umzimbeet which is a name derived from the isiZulu name umSimbithwa.
Dalbergia obovata is a robust shrub or climber in the family Fabaceae, and is native to Southern Africa.
Brachyglottis repanda, the rangiora or bushman's friend, is a small, bushy tree or tall shrub endemic to New Zealand. It grows to a height of 5 to 7 meters. The petioles of the leaves have a characteristic groove up to 10 cm long. The large leaves with a soft furry underside have been referred to as "bushman's toilet paper".
Combretum glutinosum is a shrub species of the genus Combretum, found in the Sahel belt in parts of Senegal, Burkina Faso, Ghana, Mali, the Gambia, Niger, Nigeria and Cameroon, across to parts of Sudan. It is known as dooki in Pulaar, Kantakara in Hausa, rat in Wolof and jambakatan kè in Maninka. Its synonyms are Combretum cordofanum Engl. & Diels, C. passargei Engl. & Diels, C. leonense Engl. & Diels.
Terminalia sericea is a species of deciduous tree of the genus Terminalia that is native to southern Africa. Its common names include clusterleaf, silver cluster-leaf or silver terminalia in English, vaalboom in Afrikaans and mususu in Venda.
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.
Maerua angolensis is a 10m tall, occasionally deciduous tree of the Capparaceae or caper family, often growing on termitaria and in thickets fringing seasonal watercourses, up to 1800m. Though never common, it is widespread in tropical Africa and arid regions, being absent from high-rainfall regions.
Dalbergia armata is a scrambling, deciduous species of legume that is native to subtropical to temperate regions of southeastern Africa. The robust, woody liana or small tree is armed with strong spines on the main stem and branches. It occurs sparsely or commonly in forest, bush, riparian fringes and in wooded ravines. It is sometimes employed as a bonsai subject, and it can be propagated from either seed or cuttings.
Protorhus longifolia, the red beech, is a medium to large, mostly dioecious species of tree in the family Anacardiaceae. It is native to South Africa and Eswatini, where it occurs in well-watered situations from coastal elevations to 1,250 m. The leafy, evergreen trees have rounded crowns and usually grow between 6 and 10 m tall, but regularly taller in forest.
Pteleopsis myrtifolia is one of some 10 African species in this genus in the family of Combretaceae. It is the only Pteleopsis species to occur in Southern Africa. Its flowers are strongly scented and perceived by humans to be either 'honey-like' or 'cloying' or even 'stinky'. The timber is red, hard and durable, and used for furniture and construction.
Drypetes gerrardii is a species of small tree or large shrub in the family Putranjivaceae. Common names include forest ironplum, bastard white ironwood, and forest ironwood. It is native to tropical and subtropical central and eastern Africa. It was first described in 1920 by the English botanist John Hutchinson, who named it after the English botanist William Tyrer Gerrard who collected plants and seeds in southern Africa in the 1860s.
Zanthoxylum molle is a woody plant from the Rutaceae family.