Hopea rudiformis

{{Short description|Species of tree in the family Dipterocarpaceae}}

{{Speciesbox

| image =

| image_caption =

| status = CR

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Randi, A. |author2=Kusumadewi, Y. |author3=Hoo, P.K. |author4=Maycock, C.R. |author5=Khoo, E. |author6=Julia, S. |author7=Robiansyah, I. |date=2019 |title=Hopea rudiformis |volume=2019 |page=e.T37525A149073870 |doi=10.2305/IUCN.UK.2019-3.RLTS.T37525A149073870.en |access-date=20 November 2021}}

| genus = Hopea

| species = rudiformis

| authority = P.S.Ashton

| synonyms =

}}

Hopea rudiformis is a tree in the family Dipterocarpaceae, native to Borneo. The specific epithet rudiformis means 'sword-shaped', referring to the leaf.

Description

Hopea rudiformis grows below the forest canopy, up to {{convert|35|m|-1}} tall, with a trunk diameter of up to {{convert|40|cm|0|abbr=on}}. It has buttresses up to {{convert|1|m|ft|0|abbr=on}}, as well as flying (detached) buttresses and stilt roots. The bark is smooth and greyish. The leathery leaves are shaped ovate to lanceolate and measure up to {{convert|14|cm|0|abbr=on}} long. The inflorescences measure up to {{convert|3.5|cm|0|abbr=on}} and bear up to three purple-red flowers. The nuts are egg-shaped or roundish, measuring up to {{convert|0.8|cm|1|abbr=on}} long.

Distribution and habitat

Hopea rudiformis is endemic to Borneo. Its habitat is lowland rain forests, sometimes in swamps, to elevations of {{convert|500|m|-2|abbr=on}}.

Conservation

Hopea rudiformis has been assessed as critically endangered on the IUCN Red List. It is threatened mainly by logging for its timber. It is also threatened by land conversion for agriculture. In Kalimantan, the species is threatened by fires. The species is found in some protected areas.

References

{{Reflist | refs =

{{BioRef | powo | title = Hopea rudiformis | id = 320986-1 | accessdate = 14 August 2021}}

{{cite book | last = Ashton | first = P. S. | authorlink = Peter Shaw Ashton | date = 2004 | contribution = Hopea Roxb. | editor1-last = Soepadmo | editor1-first = E. | editor2-last = Saw | editor2-first = L. G. | editor3-last = Chung | editor3-first = R. C. K. | title = Tree Flora of Sabah and Sarawak | volume = 5 | pages = 176, 177 | publisher = Forest Research Institute Malaysia | isbn = 983-2181-59-3}}

}}

rudiformis

Category:Endemic dipterocarps of Borneo

Category:Flora of the Borneo lowland rain forests

Category:Plants described in 1978

Category:Taxa named by Peter Shaw Ashton