Willem Meijer

Rafflesia kerrii is a member of the genus Rafflesia of the small parasitic family Rafflesiaceae. It is found in the rainforest of southern Thailand and peninsular Malaysia, with notable populations in Khao Sok National Park and Khlong Phanom National Park. Local Thai names are บัวผุด (bua phut), ย่านไก่ต้ม (yan kai tom) and บัวตูม (bua tum). The red flowers typically have a diameter of 50–90 cm (19+1⁄2–35+1⁄2 in) and smell awfully of rotten meat to attract flies for pollination. This species has some claim to being the world's largest flower, for although the average size of R. arnoldii is

Rafflesia keithii is a parasitic flowering plant in the genus Rafflesia endemic to Sabah in Borneo. The flowers can grow up to one metre in diameter. It is named after Henry (Harry) George Keith, former Conservator of Forests in North Borneo (now Sabah).

Rafflesia pricei is a parasitic flowering plant endemic to Borneo. It is named after amateur botanist William Price, who discovered the species on Mount Kinabalu in the 1960s. The Rafflesia Forest Reserve was established mainly to protect the species.

Rafflesia micropylora is a parasitic plant species of the genus Rafflesia. It is endemic to Sumatra in Indonesia. This species was named because of the small opening of its diaphragm or corona. The flowers are 30–60 cm diameter, with the diaphragm opening only 3–9 cm diameter, with an angular (rather than smoothly rounded) margin. Unlike the bold markings of species like R. arnoldi, R. micropylora is covered with a myriad of tiny markings. The very small aperture of the corona makes its identification easy.

Rafflesia gadutensis is a parasitic plant species of the genus Rafflesia. It is native to the Indonesian island of Sumatra. R. gadutensis was named after the place where it was first collected, Ulu Gadut, in West Sumatra.

Dipterocarpus pachyphyllus is a tree in the family Dipterocarpaceae. The specific epithet pachyphyllus means 'thick leaves'.

Shorea obscura is a species of flowering plant in the family Dipterocarpaceae. It is a tree endemic to Borneo.

Shorea hypoleuca is a species of plant in the family Dipterocarpaceae. It is endemic to Borneo.

Dipterocarpus ochraceus is a tropical rainforest tree endemic to Sabah. It is known from the ultramafic hills in the Ranau district.

Rubroshorea waltoni is a species of plant in the family Dipterocarpaceae. It is a large emergent tree up to 60 m tall. The local name seraya kelabu refers to the grey undersurface of the leaf. It is endemic to Borneo, where it is confined to Sabah.

Shorea leptoderma is a species of plant in the family Dipterocarpaceae. It is a tree endemic to Borneo where it is confined to Sabah. It grows in lowland rain forest.

Richetia kudatensis (also called seraya kuning kudat) is a species of tree in the family Dipterocarpaceae. It is endemic to Borneo, in low coastal hills of the north and west of Malaysian Sabah. Richetia kudatensis is a low emergent tree, growing up to 45 metres tall with a trunk diameter of up to 1.9 metres. Richetia kudatensis' extent of occurrence (EOO) is over 19,000 km2, and includes to Kota Kinabalu, Kuala Penyu, Kudat, Labuan, Papar, and Pitas districts. It has an estimated area of occupancy (AOO) of 92 km2. It was formerly recorded in northeastern Sabah, but has likely been extirpated

Rubroshorea venulosa is a species of tree in the family Dipterocarpaceae which is native to Borneo. The species was first described as Shorea venulosa in 1963. The specific epithet venulosa means 'small veins', referring to the leaf. In 2022 Peter Shaw Ashton and Jacqueline Heckenhauer placed the species in genus Rubroshorea as R. venulosa.

Rubroshorea fallax is a tree in the family Dipterocarpaceae, which is endemic to Borneo. The species was first described as Shorea fallax by Willem Meijer in 1963. The specific epithet fallax means "deceptive" and refers to the species initially being considered to be Shorea scaberrima. In 2022 Peter Shaw Ashton and Jaqueline Heckenhauer placed the species in the genus Rubroshorea as R. fallax.

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Rubroshorea retusa is a species of tree in the family Dipterocarpaceae. It is endemic to Borneo. The species was first described as Shorea retusa by Willem Meijer in 1963. The specific epithet retusa means 'notched', referring to the apex of the leaf. In 2022 Peter Shaw Ashton and Jacqueline Heckenhauer placed the species in genus Rubroshorea as R. retusa.

Shorea exelliptica is a species of plant in the family Dipterocarpaceae. This species has previously been confused with Shorea elliptica and the species name is derived to highlight this point (ex = excluded from). S. exelliptica is found in Peninsular Malaysia and Borneo. It is an emergent tree, up to 60 metres (200 ft) tall, found in mixed dipterocarp forest on yellow clay and sandy clay soils on sedimentary rock. It is found in at least two protected areas (Lambir Hills and Gunung Mulu National Parks).

Parashorea tomentella is a species of plant in the family Dipterocarpaceae. It is endemic to eastern Borneo (Sabah and east Kalimantan). It is a large emergent tree, up to 65 m tall, found in lowland dipterocarp forests on fertile clay soils. It is a light hardwood sold under the trade names of White Lauan or White Seraya. It is found in forest reserves on the east coast of Sabah.

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