Werner Rauh

Euphorbia ambovombensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. It is native to the area around Ambovombe at the southern end of the island, where it is locally common. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. It is threatened by habitat loss. Trade in this species is regulated under Appendix I of CITES.

Peperomia graveolens, commonly known as Ruby Glow, is a species of plant in the genus Peperomia of the family Piperaceae. It is endemic to Ecuador.

Euphorbia bongolavensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical dry forests. It is currently being threatened by habitat loss.

Euphorbia alfredii is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests, subtropical or tropical dry shrubland, and rocky areas. It is threatened by habitat loss. As most other succulent members of the genus Euphorbia, its trade is regulated under Appendix II of CITES.

Euphorbia iharanae is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is rocky shores. It is threatened by habitat loss.

Euphorbia geroldii commonly called Gerold's Spurge or Thornless Crown of Thorns is a species of flowering plant in the family Euphorbiaceae.

Euphorbia capmanambatoensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is rocky shores. It is threatened by habitat loss.

Euphorbia bemarahaensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. It is threatened by habitat loss.

Euphorbia banae is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical dry shrubland. It is threatened by habitat loss.

Peperomia columella is a species of plant in the family of Piperaceae. The species is endemic to Peru. It grows in dry areas, often in crevices on steep cliffs or in sandy soil. It grows to about 20 cm in height, forming snake-like stems, which carry closely packed, succulent bright green leaves. The leaves are truncated, U-shape in cross-section, with epidermal windows on top. It can be kept as a houseplant and has received the Award of Garden Merit by the Royal Horticultural Society.

Euphorbia tulearensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is rocky areas. It is threatened by habitat loss.

Euphorbia neobosseri is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. It is threatened by habitat loss.

Euphorbia kondoi is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical dry shrubland. It is threatened by habitat loss.

Euphorbia cylindrifolia is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. It is threatened by habitat loss.

Euphorbia berorohae is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is rocky shores. It is threatened by habitat loss.

Euphorbia ankazobensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. It is known from one single collection in the Ankazobe area of Madagascar's Central Highlands. Its natural habitat is in remnant montane forest. It is threatened by habitat loss, and its natural habitat is extremely fragmented and degraded by human activity. It is assessed as critically endangered. Trade in this species is regulated under Appendix II of CITES.

Didierea trollii is a species of Didierea native to Madagascar Spiny Forests in the province first described in 1961. It is one of the two species of the Didierea, with the other being Didierea madagascariensis.

Alluaudia montagnacii is a rare species of flowering plant in the family Didiereaceae.

Phragmipedium pearcei is a species of orchid ranging from Ecuador to northern Peru.

Gasteria baylissiana, or Suurberg gasteria, is a species of succulent flowering plant in the family Asphodelaceae native to the Eastern Cape, South Africa.

Euphorbia waringiae is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. It is threatened by habitat loss.

Euphorbia rossii is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is rocky areas. It is threatened by habitat loss. It has reddish-yellow cyathia.

Euphorbia robivelonae is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is intermittent rivers. It is threatened by habitat loss.

Euphorbia parvicyathophora is a species of flowering plant in the family Euphorbiaceae. It is endemic to South-West Madagascar. It typically lives in rocky environments; particularly, limestone is its primary locale of habitation. It grows within the soil pockets of cavernous limestone along the southern bank of the Fiherenana river, in southern Madagascar. This species is threatened by habitat loss.

Euphorbia labatii is a rare endemic known only from a single locality in Antsiranana Province, Madagascar.

Euphorbia kamponii is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry forests and subtropical or tropical dry shrubland. It is threatened by habitat loss.

Euphorbia hofstaetteri is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitats are subtropical or tropical dry shrubland and rocky areas. It is threatened by habitat loss.

Euphorbia cremersii is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.

Euphorbia cedrorum is a species of flowering plant in the family Euphorbiaceae endemic to Madagascar.

Euphorbia cap-saintemariensis is a species of plant in the family Euphorbiaceae. It is endemic to Madagascar. Its natural habitat is rocky areas. It is threatened by habitat loss.