''Madhuca silamensis'' is a tree in the family

Sapotaceae 240px, '' Madhuca longifolia'' var. ''latifolia'' in Narsapur, Medak district, India The Sapotaceae are a family (biology), family of flowering plants belonging to the order (biology), order Ericales. The family includes about 800 species of ev ...

. It is named for

Mount Silam Mount Silam ( ms, Gunung Silam) is a mountain in Lahad Datu District, Sabah, Malaysia. Description Mount Silam is high and overlooks Darvel Bay on the Celebes Sea. The geology is characterised by ultrabasic rock. Rainforest covers the mountain ...

Borneo Borneo (; id, Kalimantan) is the third-largest island in the world and the largest in Asia. At the geographic centre of Maritime Southeast Asia, in relation to major Indonesian islands, it is located north of Java, west of Sulawesi, and eas ...

Description

''Madhuca silamensis'' grows up to tall, with a trunk diameter of up to . The bark is greyish brown.

Inflorescences An inflorescence is a group or cluster of flowers arranged on a Plant stem, stem that is composed of a main branch or a complicated arrangement of branches. Morphology (biology), Morphologically, it is the modified part of the shoot of sperma ...

bear up to three flowers.

Distribution and habitat

''Madhuca silamensis'' is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to Borneo, where it is known from only two locations in

Sabah Sabah () is a States and federal territories of Malaysia, state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indone ...

. Its habitat is lowland forests growing on

ultrabasic Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta-igneous rocks with a very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are compos ...

soils up to elevation.

Conservation

''Madhuca silamensis'' has been assessed as

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inva ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

. The species is threatened by logging and conversion of land for

palm oil Palm oil is an edible vegetable oil derived from the mesocarp (reddish pulp) of the fruit of the oil palms. The oil is used in food manufacturing, in beauty products, and as biofuel. Palm oil accounted for about 33% of global oils produced from ...

plantations.

References

silamensis Endemic flora of Borneo Trees of Borneo Flora of Sabah Flora of the Borneo lowland rain forests Endemic flora of Malaysia Plants described in 2001 {{Sapotaceae-stub