Engelhardia roxburghiana Lindl.

 Engelhardia roxburghiana Lindl., Numer. List [Wallich] n. 4940 (1831), nom. inval.

Engelhardia roxburghiana Lindl. Photo by Thanh Dinh

Family:

Juglandaceae DC.ex Perleb

Synonym Name: 

Alfaroa roxburghiana (Lindl. ex Wall.) Iljinsk.

Alfaropsis roxburghiana (Lindl.) Iljinsk.

Engelhardia chrysolepis Hance

Engelhardia formosana (Hayata) Hayata

Engelhardia polystachya Radlk.

Engelhardia pterococca (Roxb.) Kuntze

Engelhardia unijuga Chun ex P.Y.Chen

Juglans pterococca Roxb.

Vietnamese name:

Chẹo cánh ngắn

English Name:

Chinese name:

黄杞 huang qi

Description: 

It grows as a tree measuring up to 35 metres (110 ft) tall with a trunk diameter of up to 70 centimetres (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 in) wide.

Distribution:

Assam, Bangladesh, Borneo, Cambodia, China South-Central, China Southeast, Hainan, Laos, Malaya, Myanmar, Sumatera, Taiwan, Thailand, Vietnam.

Ecological:

Mixed broad-leaved or evergreen forests on loam, or on steep, dry slopes with sandy soil; 200-1500 m. 

Flowering times:

Fl. Feb-Aug, fr. Jan-Dec. 

Chemical constituents:

eudesm-4(15)-ene-1β,6α-diol; (4S)-4-hydroxy-1-tetralone; (-)-regiolone; p-hydroxybenzoic acid; kaempferol; isolicoflavonol; broussoflavonol F; broussonol E; kaempferol-3-O-α-L-rhamnoside; quercetin-3-O-α-L-rhamnoside.

Type:

Uses:

The sapwood is white to pale yellow.

We do not have any more specific information on the wood of this species, but it belongs to a group of timbers known in the trade as 'Dungun Paya'. The following is a general description of dungun paya wood:-

The heartwood is grey-brown with a core that has a dark streaky colour; it merges gradually into the pale grey-brown sapwood. The texture is moderately coarse and even; the grain is straight, shallowly interlocked or sometimes wavy. The wood is soft to moderately hard, not very durable. It is easy to work but, being a fairly light timber it should not be used in situations where excessive strength and impact forces are required. Uses of the timber include veneer and plywood, turnery, moulding, tool handle for non-impact purposes, domestic flooring and general utility furniture. The corewood is decorative and it may be used for small ornamental items.

Ref:

orchidspecies.com

ipni.org

powo.science.kew.org 

efloras.org/florataxon.aspx?flora_id=2&taxon_id=200006105

en.wikipedia.org/wiki/Engelhardia_roxburghiana

tropical.theferns.info/viewtropical.php?id=Engelhardia+roxburghiana

Yang, Da-Song & Jin-Chao, YANG & Yang, Yong-Ping & Yang, Xuefei & Xiao-Li, LI. (2014). Chemical constituents from Engelhardtia roxburghiana. Chinese Traditional and Herbal Drugs. 45. 3520-3523. 10.7501/j.issn.0253-2670.2014.24.003.