Tectona grandis (common teak)

Plate 1 figs. a–h · 8 separate observations

Tectona grandis, photographed by Maria Janeiro — fig. a Maria Janeiro, CC BY 4.0 / 2022-05-02 / obs. 194769521

Tectona grandis, photographed by Utain Pummarin — fig. b Utain Pummarin, CC BY 4.0 / obs. 194876151

Tectona grandis, photographed by Hopeland — fig. c Hopeland, CC BY 4.0 / obs. 196199825

Tectona grandis, photographed by S.MORE — fig. d S.MORE, CC0 1.0 / obs. 174602851

Tectona grandis, photographed by Sabarni Sarker — fig. e Sabarni Sarker, CC BY 4.0 / obs. 148496938

Tectona grandis, photographed by John G. Phillips — fig. f John G. Phillips, CC BY 4.0 / obs. 173407589

Tectona grandis, photographed by 葉子 — fig. g 葉子, CC0 1.0 / obs. 113281090

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 8 botanical countries

Native distribution of Tectona grandis, 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.

Region	TDWG code	Continent
Assam	ASS	ASIA-TROPICAL
Bangladesh	BAN
Cambodia	CBD
India	IND
Laos	LAO
Myanmar	MYA
Thailand	THA
Vietnam	VIE

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.

Flowering 45 in flower of 114 examined

17%

71%

43%

50%

42%

60%

36%

33%

29%

Proportion of examined Tectona grandis in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	1	4	too few examined
Feb	2	3	too few examined
Mar	1	6	17%	3% to 56%
Apr	0	10	0%	0% to 28%
May	5	7	71%	36% to 92%
Jun	3	7	43%	16% to 75%
Jul	7	14	50%	27% to 73%
Aug	5	12	42%	19% to 68%
Sep	9	15	60%	36% to 80%
Oct	4	11	36%	15% to 65%
Nov	6	18	33%	16% to 56%
Dec	2	7	29%	8% to 64%

Peak flowering in May. Each bar is the share of Tectona grandis observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 45 of 114 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 2 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 8 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.

Jatus grandis (L.f.) Kuntze
Tectona grandis f. abludens Koord. & Valeton
Tectona grandis f. canescens Moldenke
Tectona grandis f. pilosula Moldenke
Tectona grandis f. punctata Moldenke
Tectona grandis f. tomentella Moldenke
Tectona theca Lour.
Theka grandis (L.f.) Lam.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
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.