Engelhardia roxburghiana

Engelhardia roxburghiana
	In Taiwan
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Embryophytes
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fagales
Family:	Juglandaceae
Genus:	Engelhardia
Species:	E. roxburghiana
Binomial name
	Engelhardia roxburghiana; Lindl.
Synonyms
	Synonymy Alfaroa roxburghiana (Lindl.) Iljinsk. ; Alfaropsis roxburghiana (Wall.) Iljinsk. ; Engelhardia chrysolepsis Hance ; Engelhardia fenzelii Merr. ; Engelhardia formosana (Hayata) Hayata ; Engelhardia polystachya Radlk. ; Engelhardia pterococca (Roxb.) Kuntze ; Engelhardia roxburghiana f. brevialata W.E.Manning ; Engelhardia spicata var. formosana Hayata ; Engelhardia unijuga Chun ex P.Y.Chen ; Engelhardia wallichiana Lindl. ex C.DC. ; Engelhardia wallichiana var. chrysolepis (Hance) C.DC. ; Juglans pterococca Roxb. ;

Engelhardia roxburghiana is a tree in the family Juglandaceae. It is native mainly to tropical Asia.

Description

Engelhardia roxburghiana grows as a tree measuring up to 35 m (110 ft) tall with a trunk diameter of up to 70 cm (30 in). The bark is fawn-coloured to dark brown to black. The inflorescences consist of eight to ten male catkins. The winged fruits measure up to 5.5 cm (2.2 in) wide.^[3]

Taxonomy

Engelhardia roxburghiana was described by English botanist John Lindley in 1831.^[2] The type specimen was collected in Malaya. The species is named for the Scottish botanist William Roxburgh.^[3]

Distribution and habitat

Engelhardia roxburghiana grows naturally from northeastern India and Bangladesh to Indochina, southern China, Taiwan, Sumatra, Peninsular Malaysia and Borneo. Its habitat is mixed tropical forest, including dipterocarp forest, from sea level to 1,750 m (5,700 ft) elevation. It is considered a pioneer species and is drought-resilient.^[1]^[3]

Conservation

Engelhardia roxburghiana has been assessed as least concern on the IUCN Red List. It is considered abundant due to its large range.^[1]

Uses

Engelhardia roxburghiana is harvested for its timber, which is suitable for furniture. Its leaves are used in Chinese traditional medicine.^[1]

References

1 2 3 4 Barstow, M. (2018). "Engelhardtia roxburghiana". IUCN Red List of Threatened Species. 2018 e.T62019664A62019666. doi:10.2305/IUCN.UK.2018-1.RLTS.T62019664A62019666.en. Retrieved 15 August 2026.
1 2 3 "Engelhardia roxburghiana Lindl". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 15 August 2026.
1 2 3 Campbell-Gasis, E. J. F. (1995). "Engelhardia roxburghiana Wall.". In Soepadmo, E.; Wong, K. M. (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). Vol. 1. Forest Research Institute Malaysia. pp. 241–242. ISBN 983-9592-34-3. Archived from the original (PDF) on 27 September 2013. Retrieved 1 June 2014.

[iucn-1] 1 2 3 4 Barstow, M. (2018). "Engelhardtia roxburghiana". IUCN Red List of Threatened Species. 2018 e.T62019664A62019666. doi:10.2305/IUCN.UK.2018-1.RLTS.T62019664A62019666.en. Retrieved 15 August 2026.

[powo-2] 1 2 3 "Engelhardia roxburghiana Lindl". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 15 August 2026.

[TFSS-3] 1 2 3 Campbell-Gasis, E. J. F. (1995). "Engelhardia roxburghiana Wall.". In Soepadmo, E.; Wong, K. M. (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). Vol. 1. Forest Research Institute Malaysia. pp. 241–242. ISBN 983-9592-34-3. Archived from the original (PDF) on 27 September 2013. Retrieved 1 June 2014.

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