Rhynchanthera grandiflora

Plate 1 figs. a–h · 5 observations

This species has been photographed under an open licence only 5 times, so some figures below are different views of the same plant, taken on the same day, rather than different individuals. They are usually different parts of it: the leaf, the flower, the bark.

Rhynchanthera grandiflora, photographed by Morten Ross — fig. a Morten Ross, CC BY 4.0 / 2010-12-02 / obs. 201366256

Rhynchanthera grandiflora, photographed by Kristof Zyskowski — fig. b Kristof Zyskowski, CC BY 4.0 / obs. 58962014

Rhynchanthera grandiflora, photographed by Guillaume Delaitre — fig. c Guillaume Delaitre, CC BY 4.0 / obs. 175323576

Rhynchanthera grandiflora, photographed by Denis Bastianelli — fig. e Denis Bastianelli, CC BY 4.0 / obs. 159923636

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

Native distribution of Rhynchanthera grandiflora, 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
Bolivia	BOL	SOUTHERN AMERICA
Brazil North	BZN
Brazil Northeast	BZE
Brazil Southeast	BZL
Brazil West-Central	BZC
Colombia	CLM
Costa Rica	COS
French Guiana	FRG
Guyana	GUY
Panamá	PAN
Peru	PER
Suriname	SUR
Venezuela	VEN
Mexico Gulf	MXG	NORTHERN AMERICA
Mexico Southwest	MXS

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 40 in flower of 47 examined

83%

100%

83%

60%

Proportion of examined Rhynchanthera grandiflora in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	2	2	too few examined
Feb	0	2	too few examined
Mar	2	2	too few examined
Apr	10	12	83%	55% to 95%
May	6	6	100%	61% to 100%
Jun	4	4	too few examined
Jul	3	3	too few examined
Aug	4	4	too few examined
Sep	5	6	83%	44% to 97%
Oct	0	0	too few examined
Nov	3	5	60%	23% to 88%
Dec	1	1	too few examined

Peak flowering in May. Each bar is the share of Rhynchanthera grandiflora 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. 40 of 47 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 8 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.

Where it actually grows measured, from 269 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	14.4 °C	22.8 °C	24.1 °C
Warmest month, mean daily high	28.7 °C	30.9 °C	32.9 °C
Annual rainfall	1,460 mm	3,088 mm	3,458 mm
Rainfall in the driest quarter	41 mm	233 mm	303 mm

It is not found anywhere that gets close to freezing. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 269 research-grade observations of Rhynchanthera grandiflora 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. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 20 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.

Melastoma grandiflorum Aubl.
Osbeckia aubletiana Spreng.
Rhynchanthera acuminata var. sublaevis Cogn.
Rhynchanthera adenophora Miq.
Rhynchanthera ambigua Naudin
Rhynchanthera betulifolia Cogn.
Rhynchanthera cardonae Wurdack
Rhynchanthera grandiflora var. microphylla Naudin
Rhynchanthera grandiflora var. monodynama (DC.) Cogn.
Rhynchanthera haenkeana DC.
Rhynchanthera insignis Naudin
Rhynchanthera intermedia Ule
Rhynchanthera limosa DC.
Rhynchanthera limosa var. depauperata Naudin
Rhynchanthera matthaei Naudin
Rhynchanthera microphylla Gleason
Rhynchanthera monodynama DC.
Rhynchanthera orinocensis Sprague
Rhynchanthera rostrata DC.
Rhynchanthera stachydimorpha DC.

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.
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.