Monoon longifolium (Indian mast tree)

Plate 1 figs. a–h · 8 separate observations

Monoon longifolium, photographed by Karthik Thrikkadeeri — fig. a Karthik Thrikkadeeri, CC BY 4.0 / 2017-07-15 / obs. 177518046

Monoon longifolium, photographed by Kim, Hyun-tae — fig. c Kim, Hyun-tae, CC BY 4.0 / obs. 6099391

Monoon longifolium, photographed by Rohit — fig. d Rohit, CC BY-SA 4.0 / obs. 49372413

Monoon longifolium, photographed by Agnes — fig. e Agnes, CC BY 4.0 / obs. 201799726

Monoon longifolium, photographed by Greg III Espera — fig. f Greg III Espera, CC BY 4.0 / obs. 172839417

Monoon longifolium, photographed by Navaneeth Sini George — fig. h Navaneeth Sini George, CC BY 4.0 / obs. 148048775

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 2 botanical countries

Native distribution of Monoon longifolium, 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
India	IND	ASIA-TROPICAL
Sri Lanka	SRL

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 1,129 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	7.9 °C	18.4 °C	24.2 °C
Warmest month, mean daily high	28.8 °C	34.0 °C	40.0 °C
Annual rainfall	665 mm	1,396 mm	3,048 mm
Rainfall in the driest quarter	2 mm	40 mm	286 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 1,129 research-grade observations of Monoon longifolium 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 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.

Guatteria longifolia (Sonn.) Wall.
Polyalthia longifolia (Sonn.) Benth. & Hook.f. ex Thwaites
Polyalthia longifolia (Sonn.) Hook.f. & Thomson
Polyalthia longifolia var. pendula Benthall
Unona altissima Russell ex Wall.
Unona longifolia (Sonn.) Dunal
Uvaria altissima Pennant
Uvaria longifolia Sonn.

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.