Dirk Fok van Slooten

Shorea seminis is a species of tree in the family Dipterocarpaceae. It is native to Borneo and Palawan. Diptoindonesin A is a C-glucoside of ε-viniferin isolated from S. seminis.

Dipterocarpus tempehes is a species of tree in the family Dipterocarpaceae. It is endemic to Borneo. The tree is found in swampy areas and along streams. It grows up to 45 metres (150 ft) high.

Dipterocarpus coriaceus is a species of tree in the family Dipterocarpaceae endemic to Borneo (Kalimantan and Sarawak), Peninsular Malaysia, and Sumatra including Sembilang National Park and Batam in the Riau Islands. It grows in lowland peat swamp forests and lowland rain forests. In July 2013 the New Straits Times reported the species to be extinct in Peninsular Malaysia, as its last natural habitat in Bikam Forest Reserve in Perak was de-gazetted and cleared for oil palm cultivation. The species was first described by Dirk Fok van Slooten in 1927.

Dipterocarpus borneensis is a species of tree in the family Dipterocarpaceae. It is native to Borneo, Sumatra and Java. Dipterocarpus borneensis grows as a large tree reaching up to 30 m (100 ft) in height. It primarily occurs in lowland heath forests but also in mixed swamp forests and on raised beaches and plateaus. It occurs at elevations up to 400 m (1,300 ft).

Dipterocarpus applanatus is a species of tree in the family Dipterocarpaceae. It is endemic to Borneo.

Vatica maritima is a tree in the family Dipterocarpaceae, native to Borneo and the Philippines. The specific epithet maritima means "of the sea", referring to species' habitat.

Vatica flavovirens is a species of plant in the family Dipterocarpaceae. It is a tree endemic to Sulawesi in Indonesia. It is an endangered species threatened by habitat loss.

Parashorea aptera is a species of plant in the family Dipterocarpaceae. It is a tree endemic to Sumatra, where it grows in lowland rain forest from 6 to 350 meters elevation. It is threatened by habitat loss from deforestation and expansion of agriculture and plantations, and from timber logging, and the IUCN Red List assesses the species as Endangered. The species was first described by Dirk Fok van Slooten in 1927.

Dryobalanops fusca is a species of plant in the family Dipterocarpaceae. It is native to Borneo.

Dipterocarpus costulatus is a species of tree in the family Dipterocarpaceae. It grows up to 50 m (160 ft) tall.

Dipterocarpus confertus is a species of plant in the family Dipterocarpaceae. The species is named derived from Latin (confertus = crammed together) and probably refers to the indumentum. It is an emergent tree, up to 50 m (160 ft) tall. It is widespread in mixed dipterocarp forest on leached yellow clay soils up to 800 meters elevation. It is endemic to Borneo. The species is threatened by deforestation. It is a medium hardwood sold under the trade names of Keruing. It is found in at least one protected area (Sepilok Forest Reserve).

Anisoptera megistocarpa is a species of plant in the family Dipterocarpaceae. It is a tree native to Peninsular Thailand, Peninsular Malaysia, Singapore, and Sumatra. The species was first described by Dirk Fok van Slooten in 1926.

Anisoptera grossivenia is a tree in the family Dipterocarpaceae, native to Borneo. The specific epithet grossivenia means "veined like unripe fig", referring to the purple veins of the leaf.

Vatica obovata is a species of flowering plant in the family Dipterocarpaceae. It is a tree endemic to Sumatra. It is an endangered species threatened by habitat loss.

Vatica bella is a species of plant in the family Dipterocarpaceae. It is a tree endemic to Peninsular Malaysia. It is a critically endangered species threatened by habitat loss.

Hopea gregaria is a species of flowering plant in the family Dipterocarpaceae. It is a tree native to southeastern Sulawesi. It is a medium-sized tree which grows up to 35 meters tall. It is native to primary lowland rain forest, where it grows gregariously in well-drained, hilly, and steep places on stony and clay soils from 20 to 300 meters elevation. It is an endangered species threatened by habitat loss. The species was described by Dirk Fok van Slooten in 1952.

Dipterocarpus semivestitus is a species of tree in the family Dipterocarpaceae, native to southeastern Borneo (Kalimantan) and Perak in Peninsular Malaysia. This tree is almost always found in lowland forest on swampy land. The species is threatened by timber harvesting and habitat loss from conversion of lowland forest to agriculture and plantations. The IUCN Red List assessed the species as Endangered, and it is very close to extinction in Peninsular Malaysia. The species was described by Dirk Fok van Slooten in 1927.

Dipterocarpus sarawakensis, locally called the Sarawak keruing, is a species of tree in the family Dipterocarpaceae, found in Peninsular Malaysia and Borneo. It is locally common on leached sandy soils on low coastal hills. The species was thought to be present uniquely in Sarawak (hence its specific name) until the discovery of 53 trees in Jerangau Forest Reserve at the end of 2004.

Dipterocarpus palembanicus is a species of tree in the family Dipterocarpaceae. There are two subspecies: borneensis and palembanicus. It is found in Borneo, Malaya, and Sumatera.

Dipterocarpus humeratus is a species of tree in the family Dipterocarpaceae. The species name humeratus is derived from Latin (humerus = shoulder) and refers to the articulated petiole. D. humeratus is an emergent tree, up to 50 m tall, found in mixed dipterocarp forests on well-drained clay soils. The species is found scattered or semi-gregarious on undulating land and clay ridges below 700 m elevation. It is found in Sumatra and Borneo (Brunei, Sabah, Sarawak and Kalimantan) and occurs in at least three protected areas (Sepilok Forest Reserve, Ulu Temburong and Gunung Mulu National Parks).

Dipterocarpus conformis is a species of plant in the family Dipterocarpaceae. The species is named derived from Latin (conformis = of a similar form) and alludes to the great similarity in vegetative characters with two other large-leaved Dipterocarpus species (D. concavus and D. confertus). There are two subspecies; D. conformis subsp. conformis which is confined to Aceh and North Sumatra and D. conformis subsp. borneensis which is confined to Borneo. D. conformis subsp. borneensis is an emergent tree, up to 50 m tall, in mixed dipterocarp forest on clay soils over shale. It is a medium

Vatica stapfiana is a species of flowering plant in the family Dipterocarpaceae. It is found in Sumatra, Peninsular Malaysia, and Thailand. This tree is an Vulnerable species threatened by habitat loss.

Parashorea densiflora (also called white seraya) is a species of flowering plant in the family Dipterocarpaceae. It is a tree native to Laos, Thailand, and Peninsular Malaysia. It grows up to 40 m (130 ft) tall. It flowers in March to April and fruits from May to December. Two subspecies are accepted. Parashorea densiflora subsp. densiflora – native to Peninsular Malaysia, in the states of Johor, Negeri Sembilan, Pahang, Perak, Selangor and Terengganu. It grows in lowland and hill mixed dipterocarp rain forest. Parashorea densiflora subsp. kerrii (Tardieu) Pooma – native to northeastern

Hopea erosa is a species of flowering plant in the family Dipterocarpaceae. It is a tree endemic to the southern Western Ghats in southwestern India. It grows in lowland semi-evergreen and evergreen tropical moist forests from 70 to 800 meters elevation. The species was first described as Balanocarpus erosus by Richard Henry Beddome in 1874. In 1956 Richard Henry Beddome placed the species in genus Hopea as H. erosa.

Hopea dasyrrhachis is a species of flowering plant in the family Dipterocarpaceae. It is a tree native to northern and western Borneo, including Brunei, Kalimantan (Indonesia), and Sabah and Sarawak (Malaysia).

Hopea cagayanensis is a species of flowering plant in the family Dipterocarpaceae. It is a tree endemic to northeastern Luzon in the Philippines. It is native to lowland dipterocarp rain forest of the Lauan-Yakal type in Apayao, Cagayan and Ilocos Norte provinces. It flowers once every 4 to 6 years in May. The species was first described as Balanocarpus cagayanensis by Frederick William Foxworthy in 1918. In 1956 Dirk Fok van Slooten placed the species in genus Hopea as H. cagayanensis.

Hemiscolopia is a genus of flowering plants belonging to the family Salicaceae. It contains a single species, Hemiscolopia trimera. Its native range is Indo-China to Western Malesia.

Dipterocarpus verrucosus is a species of tree in the family Dipterocarpaceae. It is native to Borneo, Peninsular Malaysia and Thailand. The species locally common on ridges in lowland mixed dipterocarp forest. Its keruing timber is exploited by logging, particularly in Borneo.

Dipterocarpus mundus is a species of tree in the family Dipterocarpaceae, endemic to Borneo. The species is found in lowland mixed dipterocarp forests.

Dipterocarpus cinereus is a species of flowering plant in the family Dipterocarpaceae. It is a tree endemic to Mursala Island, off the west-central coast of Sumatra. It is a large tree with a trunk up to 40 cm in diameter. It grows on hilltops in lowland rain forest between 20 and 370 meters elevation, typically on leached soils. It is threatened by overharvesting for timber and habitat loss from forest clearance for rubber plantations. The IUCN Red List assesses the species as critically endangered, with a total population of only 30 mature individuals and low numbers of seedlings. The