Himantoglossum robertianum

Plate 1 figs. a–h · 8 separate observations

Himantoglossum robertianum, photographed by Fabien Piednoir — fig. b Fabien Piednoir, CC BY-SA 4.0 / obs. 192298849

Himantoglossum robertianum, photographed by David Delon — fig. c David Delon, CC BY 4.0 / obs. 190436666

Himantoglossum robertianum, photographed by Jacqueline Jeanne — fig. d Jacqueline Jeanne, CC0 1.0 / obs. 190802139

Himantoglossum robertianum, photographed by Valentin Moser — fig. e Valentin Moser, CC BY 4.0 / obs. 191085651

Himantoglossum robertianum, photographed by Josep Gesti — fig. g Josep Gesti, CC BY-SA 4.0 / obs. 183265269

Himantoglossum robertianum, photographed by Daniel Cahen — fig. h Daniel Cahen, CC BY 4.0 / obs. 183096721

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 18 botanical countries

Native distribution of Himantoglossum robertianum, 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. Regions too small to draw at this scale are marked with a dot.

Region	TDWG code	Continent
Baleares	BAL	EUROPE
Corse	COR
France	FRA
Greece	GRC
Italy	ITA
Kriti	KRI
NW. Balkan Pen.	YUG
Portugal	POR
Sardegna	SAR
Sicilia	SIC
Spain	SPA
Algeria	ALG	AFRICA
Libya	LBY
Morocco	MOR
Tunisia	TUN
Cyprus	CYP	ASIA-TEMPERATE
East Aegean Is.	EAI
Türkiye	TUR

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 1,820 in flower of 2,169 examined

49%

89%

95%

77%

38%

33%

Proportion of examined Himantoglossum robertianum in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	74	152	49%	41% to 57%
Feb	544	608	89%	87% to 92%
Mar	934	988	95%	93% to 96%
Apr	241	315	77%	72% to 81%
May	15	39	38%	25% to 54%
Jun	1	2	too few examined
Jul	0	0	too few examined
Aug	0	1	too few examined
Sep	0	0	too few examined
Oct	0	8	0%	0% to 32%
Nov	0	23	0%	0% to 14%
Dec	11	33	33%	20% to 50%

Peak flowering in Mar. Each bar is the share of Himantoglossum robertianum 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. 1,820 of 2,169 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 4 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 1,913 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-1.8 °C	3.4 °C	9.5 °C
Warmest month, mean daily high	22.7 °C	27.9 °C	32.1 °C
Annual rainfall	445 mm	761 mm	1,200 mm
Rainfall in the driest quarter	14 mm	89 mm	178 mm

It is found where winters bring light frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,913 research-grade observations of Himantoglossum robertianum 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 25 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.

Aceras longibracteata var. gallica (Lindl.) Rchb.f.
Aceras longibracteata var. sicula (Lindl.) Rchb.f.
Aceras longibracteatum Rchb.f.
Aceras longibracteatum var. gallica (Lindl.) Rchb.f.
Aceras longibracteatum var. sicula (Lindl.) Rchb.f.
Barlia longibracteata (Rchb.f.) Parl.
Barlia longibracteata var. gallica (Lindl.) Rouy
Barlia longibracteata var. sicula (Lindl.) Rouy
Barlia robertiana (Loisel.) Greuter
Barlia robertiana f. sicula (Lindl.) Hervás, De Bellard, Calzado, J.C.Huertas, Reyes Carr. & Ruíz Cano
Barlia robertiana var. candida Soó
Himantoglossum longibracteatum (Rchb.f.) Schltr.
Himantoglossum longibracteatum var. gallicum (Lindl.) Schltr.
Himantoglossum longibracteatum var. siculum (Lindl.) Schltr.
Himantoglossum robertianum f. candidum (Soó) F.M.Vázquez
Himantoglossum robertianum f. gallicum (Lindl.) F.M.Vázquez
Himantoglossum robertianum f. siculum (Lindl.) F.M.Vázquez
Loroglossum longibracteatum (Rchb.f.) Moris ex Ardoino
Orchis coriophora var. cassidea Nevski
Orchis foliosa Masson ex Ker Gawl.
Orchis fragrans Ten.
Orchis longibracteata Biv.
Orchis longibracteata var. gallica Lindl.
Orchis longibracteata var. sicula Lindl.

and 1 more.

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.