Thomas Archibald Sprague

Ajwain or ajowan (Trachyspermum ammi) —also known as ajowan caraway, thymol seeds, bishop's weed, or carom—is an annual herb in the family Apiaceae. Both the leaves and the seed‑like fruit (often mistakenly called seeds) of the plant are consumed by humans. The name "bishop's weed" also is a common name for other plants. The "seed" (i.e., the fruit) is often confused with lovage seed.

Entandrophragma cylindricum is a tree of the genus Entandrophragma of the family Meliaceae. It is commonly known as sapele or sapelli ( sə-PEE-lee) or sapele mahogany, as well as aboudikro, assi, and muyovu.

Entandrophragma utile, called the sipo or utile, is a species of large tree in the genus Entandrophragma, native to nearly all of tropical Africa facing the Atlantic, from Guinea to Angola, and as far east as Uganda. The timber is traded as a tropical hardwood. It is sometimes called sipo mahogany. It shares many of the characteristics of genuine mahogany and is used as an alternative. The timber provides high chatoyancy, with an average value above 21 PZC.

Podranea ricasoliana, called the pink trumpet vine, is a species of flowering plant in the genus Podranea, native to South Africa, Malawi, Mozambique and Zambia. It has gained the Royal Horticultural Society's Award of Garden Merit.

Podranea is a genus of one or two species of African flowering vines in the family Bignoniaceae. The native range of this genus is southern tropical Africa and southern Africa. It is found in Malawi, Mozambique, Zambia, Zimbabwe and also the Cape Provinces and KwaZulu-Natal in South Africa. The genus name of Podranea is derived from anagram of Pandorea. As the genus was separated out from the other Bignoniaceae genus. The genus was circumscribed by Thomas Archibald Sprague in Fl. Cap. (Harvey) vol.4 (2.3) on page 449 in 1904.

Entandrophragma excelsum, is Africa's tallest indigenous tree native to tropical East Africa and occurs in eastern D.R.of the Congo, Rwanda, Burundi, Uganda, Tanzania, Malawi and Zambia. This species is scattered in areas of upland semi-deciduous forest, in mid-elevation and montane rainforest, at (925 –) 1280 – 2150 metres elevation. It is locally also found in riverine forest.

Heritiera utilis is a species of flowering plant in the family Malvaceae (or Sterculiaceae). It is found in Ivory Coast, Gabon, Ghana, Liberia, and Sierra Leone. It is threatened by habitat loss.

Balanites maughamii (manduro, torchwood, Afrikaans: Groendoring, Zulu: Ugobandlovu) is a species of tree native to southern and eastern Africa. It ranges from Kenya through Tanzania, Malawi, Mozambique, Zambia, Zimbabwe, the Caprivi Strip of Namibia, Eswatini, and the Northern Provinces and KwaZulu-Natal in South Africa. It is deciduous or semi-deciduous, growing to 20 (–25) meters tall, with a rounded and spreading crown. It has a fluted trunk up to 1.3 m in diameter. It rarely grows as a low shrub 1.5 to 2 m tall. It is a protected tree in South Africa. Groendoring, a community outside Asab

Xylopia discreta is a species of plant in the Annonaceae family. It is native to Brazil, Colombia, French Guiana, Guyana, Suriname, and Venezuela. Carl Linnaeus the Younger, the botanist who first formally described the species using the basionym Unona discreta, named it after its purple, aromatic fruit which set it apart (discretus in Latin) from other members of the family.

Galbulimima belgraveana is a tropical forest tree with hallucinogenic properties. Its common names include agara white magnolia and pigeonberry ash. It is native to northeastern Australia, Malaysia, and Papua New Guinea.

Entandrophragma caudatum, or mountain mahogany, is a large Southern African tree belonging to the mahogany family and found in eastern and north eastern South Africa, Eswatini, Botswana, Angola, the Caprivi Strip region of Namibia, Zimbabwe, Zambia and Malawi. Kew currently recognises 12 other species of Entandrophragma, all with a tropical and sub-tropical African distribution. This is a large deciduous tree up to 20m in height, found at low altitudes in river valleys, but also in open woodland on rocky slopes and ridges. Bark is grey, flaking in large, irregular scales and revealing a buff

Balanites wilsoniana is a species of fruit-bearing tree from west and central Africa in the caltrop family Zygophyllaceae.

Warburgia ugandensis, also known as Ugandan greenheart or simply greenheart tree, is a species of evergreen tree native to East Africa. Countries in which the plant species is found include Kenya, Tanzania and Uganda. The wood is resistant to insect attack and very strong. It was commonly used for the yoke pole of ox-wagons, the Disselboom. Early Indian immigrants to Kenya, working on the construction of the railway, used the leaves to flavor their curries before the chilli plant was commonly introduced. The flavor is hot and subtly different from chillies. Extracts of W. ugandensis have been

Echium leucophaeum is a species of flowering plants of the family Boraginaceae. It is endemic to the Canary Islands, where it is restricted to the island of Tenerife. Its name in Spanish is taginaste de Anaga. The specific name leucophaeum is from Greek and means "greyish white".

Echium brevirame is a species of flowering plant of the family Boraginaceae. It is endemic to the Canary Islands, where it is restricted to the island of La Palma. It is a low woody shrub with, average height 30 centimetres (12 in), maximum height 100 centimetres (39 in). The leaves are leathery, spiny, and lance-shaped. Its flowers are white and sit in a compact inflorescence.

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Pehria is a monotypic genus of plant in family Lythraceae. It has one known synonym, Grislea Loefl.. The genus just contains one known species, Pehria compacta (Rusby) Sprague Its native range stretches from Central America down to Venezuela. It is found in Colombia, Honduras and Nicaragua.

Markhamia obtusifolia is a species of plant in the family Bignoniaceae. It is found in Southern Africa. This species usually grows as a shrub or small to medium tree, reaching heights of 5–15 m. Found in sparsely treed areas, such as fields. Flowers are yellow, and fruit is a long capsule shape.

Inga bollandii is a species of plant in the family Fabaceae. It is found only in Brazil.

Hoheria glabrata, the mountain lacebark or ribbonwood, is a species of flowering plant in the family Malvaceae, endemic to the South Island of New Zealand. It is one of the few deciduous trees to be found in New Zealand growing to 10 m (33 ft) tall with green leaves that turn yellow in autumn, and white flowers that appear around January. Mainly found in the wetter parts of the mountainous regions of the South Island. Leaves are toothed around the margins, also look for the distinctive heart shape of the leaf which differentiates it from the very similar Hoheria lyallii. H. glabrata is a

Hibiscus aponeurus is a species of Hibiscus. It can grow up to 1.5 m (4 ft 11 in) tall and has red flowers and capsule fruit. It is native to eastern tropical Africa, ranging from Mozambique to Djibouti, and to Yemen on the southeastern Arabian Peninsula.

Euonymus wilsonii, the Chinese euonymus, is a species of flowering plant in the family Celastraceae. It is native to central and southern China. A large, lax shrub typically 3 to 4 m (10 to 13 ft) tall, it is found in forests and scrublands at elevations from 1,000 to 2,600 m (3,300 to 8,500 ft). In cultivation it is valued for its spiky yellow fruit that the Royal Horticultural Society says "resemble little yellow hedgehogs dangling in the breeze". It is available from commercial suppliers, but is often confused with Euonymus myrianthus, the many-flowered spindle.

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Annona jamaicensis is a species of plant in the Annonaceae family. It is endemic to Jamaica. Its pollen is shed as permanent tetrads.

Xylophragma is a genus of flowering plants in the family Bignoniaceae, native to dry forests of Mexico, Central America, Trinidad and northern South America. They are lianas or scandent shrubs.

Tripterygium regelii, or Regel's threewingnut (Pinyin: Dōngběi léigōng téng), is a rambling, shrubby perennial deciduous yellow vine native to Korea, Japan and Manchuria. It grows to about 200 centimetres (79 in). Small very pretty yellowish white or white flowers appear in May–June and are produced on 203–229 millimetres (8.0–9.0 in) long panicles, and smell somewhat of new-mown hay. Fruits are greenish white, 3-angled, and winged. "Tripterygium wilfordii Hook.f., known as Leigongteng (Thunder God Vine) in traditional Chinese medicine, has attracted much attention for its applications in

Saurauia aequatoriensis is a species of plant in the Actinidiaceae family. It is endemic to Ecuador. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.

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