Engelhardia roxburghianaLindl.

WFO wfo-0000667939 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Engelhardia roxburghiana, photographed by 胡正恆(Jackson Hu)
fig. a 胡正恆(Jackson Hu), CC BY 4.0 / 2022-06-04 / obs. 203449963
Engelhardia roxburghiana, photographed by 呂一起(Lyu yi-chi)
fig. b 呂一起(Lyu yi-chi), CC BY 4.0 / obs. 160018713
Engelhardia roxburghiana, photographed by Cheng-Tao Lin
fig. c Cheng-Tao Lin, CC BY 4.0 / obs. 101201513
Engelhardia roxburghiana, photographed by Meng-Ying Tsai
fig. d Meng-Ying Tsai, CC0 1.0 / obs. 98537686
Engelhardia roxburghiana, photographed by Jacy Chen
fig. e Jacy Chen, CC BY 4.0 / obs. 89740548
Engelhardia roxburghiana, photographed by 國立臺灣博物館
fig. f 國立臺灣博物館, CC BY 4.0 / obs. 60131039
Engelhardia roxburghiana, photographed by Jacy Chen
fig. g Jacy Chen, CC BY 4.0 / obs. 108133147
Engelhardia roxburghiana, photographed by 國立臺灣博物館
fig. h 國立臺灣博物館, CC BY 4.0 / obs. 60130853

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 15 botanical countries

Regions where Engelhardia roxburghiana is native: China South-Central, China Southeast, Hainan, Taiwan, Assam, Bangladesh, Borneo, Cambodia, East Himalaya, Laos, Malaya, Myanmar, Sumatera, Thailand, Vietnam China South-CentralChina SoutheastHainanTaiwanAssamBangladeshBorneoCambodiaEast HimalayaLaosMalayaMyanmarSumateraThailandVietnam
Native distribution of Engelhardia roxburghiana, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Assam ASS ASIA-TROPICAL
Bangladesh BAN
Borneo BOR
Cambodia CBD
East Himalaya EHM
Laos LAO
Malaya MLY
Myanmar MYA
Sumatera SUM
Thailand THA
Vietnam VIE
China South-Central CHC ASIA-TEMPERATE
China Southeast CHS
Hainan CHH
Taiwan TAI

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Where it actually grows measured, from 605 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low 5.4 °C 10.4 °C 14.0 °C
Warmest month, mean daily high 22.0 °C 27.8 °C 30.0 °C
Annual rainfall 2,327 mm 3,494 mm 4,871 mm
Rainfall in the driest quarter 111 mm 265 mm 828 mm

It is barely found anywhere that freezes. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 605 research-grade observations of Engelhardia roxburghiana that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 14 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Alfaroa roxburghiana (Lindl.) Iljinsk.
  • Alfaropsis roxburghiana (Lindl.) Iljinsk.
  • Engelhardia chrysolepis Hance
  • Engelhardia fenzlii 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 Lindl.
  • Engelhardia wallichiana var. chrysolepis (Hance) C.DC.
  • Juglans pterococca Roxb.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.