Orthosia virgata

Plate 1 figs. a–h · 8 separate observations

Orthosia virgata, photographed by Andrea Gantzer — fig. b Andrea Gantzer, CC BY 4.0 / obs. 171126445

Orthosia virgata, photographed by Leonel Roget — fig. c Leonel Roget, CC BY 4.0 / obs. 164151073

Orthosia virgata, photographed by demianlescano — fig. d demianlescano, CC0 1.0 / obs. 147957571

Orthosia virgata, photographed by Eduardo Luis Beltrocco — fig. e Eduardo Luis Beltrocco, CC BY 4.0 / obs. 137277139

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 4 botanical countries

Native distribution of Orthosia virgata, 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
Argentina Northeast	AGE	SOUTHERN AMERICA
Brazil South	BZS
Paraguay	PAR
Uruguay	URU

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 155 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	6.4 °C	8.0 °C	8.8 °C
Warmest month, mean daily high	26.0 °C	28.7 °C	30.6 °C
Annual rainfall	1,064 mm	1,126 mm	1,242 mm
Rainfall in the driest quarter	86 mm	169 mm	262 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 155 research-grade observations of Orthosia virgata 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 Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.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 13 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.

Astephanus streptocarpus E.Fourn.
Cynanchum caudatum Vell.
Cynanchum diffusum (Gillies ex Hook.) Hook. & Arn.
Cynanchum multiflorum (E.Fourn.) K.Schum.
Cynanchum pusillum Spreng. ex Fourn.
Ionidium diffusum Gillies ex Hook.
Metastelma diffusum (Gillies ex Hook.) Decne.
Metastelma virgatum (Poir.) Decne.
Orthosia multiflora E.Fourn.
Periploca virgata Poir.
Streptocaulon virgatum (Poir.) G.Don
Vincetoxicum multiflorum (E.Fourn.) Kuntze
Vincetoxicum virgatum (Poir.) Kuntze

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.