Lewis Leonard Forman

Trigonobalanus is a genus of three species of evergreen trees in the family Fagaceae, related to oaks, beeches and chestnuts. The species are widely scattered, with one in northern South America and two in southeast Asia; some botanists treat the three species in separate genera. The three species, with their authors, major synonyms, and distribution, are: Trigonobalanus doichangensis (A.Camus) Forman – subtropical Yunnan to northern Thailand Trigonobalanus excelsa Lozano, Hern. Cam. & Henao – endemic to Colombia Trigonobalanus verticillata Forman – tropical Indonesia and the Malay Peninsula

Trigonobalanus doichangensis is a species of tree in the family Fagaceae that can reach 21 metres (69 ft) in height. It is only found at few sites in Yunnan in China and at one site in Chiang Rai in Thailand. It is threatened by habitat loss and degradation. In China it is under second-class national protection.

Trigonobalanus verticillata is a species of plant in the family Fagaceae. It is a tree native to Borneo, Sumatra, Sulawesi, the Malay Peninsula, and Hainan.

Rosselia is a genus of plants in the family Burseraceae. The sole species is Rosselia bracteata, endemic to Papua New Guinea. It is a tree and grows primarily in the wet tropical biome(s). Both the genus and the species were circumscribed by Lewis Leonard Forman in Kew Bull. vol.49 on page 603 in 1994. The genus name of Rosselia is named after Rossel Island which was named in honour of Élisabeth-Paul-Édouard de Rossel (1765–1829), French astronomer and Master-at-arms. He was on the frigate 'La Recherche' with Joseph Antoine Raymond Bruny d'Entrecasteaux on the search for the missing La

Beiselia is a genus of flowering plants belonging to the family Burseraceae. The only species is Beiselia mexicana. Its native range is Southwestern Mexico.

Allantospermum is a genus of trees up to 90 m (300 ft) tall in the family Irvingiaceae. Formerly it has been included in families Simaroubaceae and Ixonanthaceae. It contains the following two species: Allantospermum borneense – Malesia Allantospermum multicaule – Madagascar

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Stephania tomentella is a herbaceous perennial vine of the family Menispermaceae and genus Stephania. It is native to Southeast Asia and was first described in Thailand in 1988 by L. L. Forman. It is one of 15 Stephania found only in northern Thailand, specifically in the area around Chiang Rai. It has leaves measuring 7–9 cm (2.8–3.5 in) in both width and length. It is commonly found amongst limestone rocks.

Stephania suberosa is a shrub native to Thailand and Cambodia, described by Lewis Leonard Forman in 1980.

Stephania crebra is a herbaceous perennial vine in the genus Stephania of the family Menispermaceae. It is native to Southeast Asia and was first described in Thailand in 1988 by L. L. Forman. It is one of 15 Stephania found only in northern Thailand, specifically in the province of Chiang Mai. It has leaves 12–17 cm (4.7–6.7 in) long and 9–16 cm (3.5–6.3 in) wide. It resembles Stephania reticulata but S. crebra has larger flowers but smaller drupes and endocarps.

Madhuca palembanica is a tree in the family Sapotaceae. It is named for Palembang in Sumatra.

Madhuca fusca is a tree in the family Sapotaceae. The specific epithet fusca means 'very dark brown', referring to the indumentum.

Eleutharrhena is a genus of flowering plants belonging to the family Menispermaceae. Its native range is Assam to Southern Central China. Species: Eleutharrhena macrocarpa (Diels) Ecrman

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Aetheolirion is a genus of flowering plants in the dayflower family Commelinaceae, first described in 1962. It contains just one species, Aetheolirion stenolobium, which is endemic to Thailand.

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Stephania reticulata is a shrub native to Myanmar, Thailand, Laos, Borneo and Java. It was described by Lewis Leonard Forman in 1956.

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Rosselia is a genus of plants in the family Burseraceae. The sole species is Rosselia bracteata, endemic to Papua New Guinea. It is a tree and grows primarily in the wet tropical biome(s). Both the genus and the species were circumscribed by Lewis Leonard Forman in Kew Bull. vol.49 on page 603 in 1994. The genus name of Rosselia is named after Rossel Island which was named in honour of Élisabeth-Paul-Édouard de Rossel (1765–1829), French astronomer and Master-at-arms. He was on the frigate 'La Recherche' with Joseph Antoine Raymond Bruny d'Entrecasteaux on the search for the missing La

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Parapachygone is a genus of flowering plants belonging to the family Menispermaceae that is endemic to Queensland, Australia. It contains just one species, Parapachygone longifolia.

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Allantospermum borneense is a tree in the family Irvingiaceae. The specific epithet borneense is from the Latin meaning "of Borneo".

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Stephania tuberosa is a plant in the family Menispermaceae which is endemic to Queensland. It grows as a vine with a stem diameter of up to 5 cm (2.0 in) and produces a distinctive large tuber on the ground which can be up to 50 cm (20 in) diameter.