Guenthera persica(Boiss. & Hohen.) D.A.German

elongated mustard

WFO wfo-1000077012 Accepted WFO 2026-06 8 photographs CC0 / CC BY

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.

Guenthera persica, photographed by Сергей Крыленко
fig. a Сергей Крыленко, CC BY 4.0 / 2016-04-05 / obs. 57850226
Guenthera persica, photographed by Сергей Крыленко
fig. b Сергей Крыленко, CC BY 4.0 / obs. 57850228
Guenthera persica, photographed by bulatik
fig. c bulatik, CC0 1.0 / obs. 201482241
Guenthera persica, photographed by Елена Патерикина
fig. d Елена Патерикина, CC BY 4.0 / obs. 151269565
Guenthera persica, photographed by Елена Патерикина
fig. e Елена Патерикина, CC BY 4.0 / obs. 144885751
Guenthera persica, photographed by Dmitry Lyskov
fig. f Dmitry Lyskov, CC0 1.0 / obs. 148228844
Guenthera persica, photographed by Елена Патерикина
fig. g Елена Патерикина, CC BY 4.0 / obs. 151270048
Guenthera persica, photographed by Елена Патерикина
fig. h Елена Патерикина, CC BY 4.0 / obs. 144885835

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 7 botanical countries

Regions where Guenthera persica is native: Türkiye, Austria, Bulgaria, Czechia-Slovakia, Hungary, NW. Balkan Pen., Romania TürkiyeAustriaBulgariaCzechia-SlovakiaHungaryNW. Balkan Pen.Romania
Native distribution of Guenthera persica, 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.
RegionTDWG codeContinent
Austria AUT EUROPE
Bulgaria BUL
Czechia-Slovakia CZE
Hungary HUN
NW. Balkan Pen. YUG
Romania ROM
Türkiye TUR ASIA-TEMPERATE

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 85 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -15.0 °C -8.5 °C 0.2 °C
Warmest month, mean daily high 24.2 °C 26.2 °C 30.1 °C
Annual rainfall 303 mm 532 mm 676 mm
Rainfall in the driest quarter 31 mm 94 mm 128 mm

It is found where winters bring hard 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 85 research-grade observations of Guenthera persica 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 27 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.

  • Brassica armoracioides Czern. ex Turcz.
  • Brassica beytepeensis Yıld.
  • Brassica brevirostrata C.H.An
  • Brassica elongata Ehrh.
  • Brassica elongata subsp. duralii Yıld.
  • Brassica elongata subsp. elongata Ehrh.
  • Brassica elongata subsp. integrifolia (Boiss.) Breistr.
  • Brassica elongata subsp. takhtajanii (V.I.Dorof.) D.A.German
  • Brassica elongata var. integrifolia Boiss.
  • Brassica elongata var. persica (Boiss. & Hohen.) Paol.
  • Brassica obtusangula subsp. integrifolia (Boiss.) Arcang.
  • Brassica persica Boiss. & Hohen.
  • Brassicastrum elongatum (Ehrh.) Link
  • Eruca elongata (Ehrh.) Baumg.
  • Erucastrum armoracioides Litv.
  • Erucastrum armoracioides (Czern. ex Turcz.) Cruchet
  • Erucastrum elongatum (Ehrh.) Rchb.
  • Erucastrum takhtajanii V.I.Dorof.
  • Erussica armoracioides (Czern. ex Turcz.) G.H.Loos
  • Erussica elongata (Ehrh.) G.H.Loos
  • Guenthera elongata (Ehrh.) Besser
  • Guenthera elongata (Ehrh.) Gomez-Campo
  • Guenthera elongata (Ehrh.) Andrz.
  • Guenthera elongata subsp. elongata

and 3 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. USDA PLANTS Database. common name, checklist symbol BREL2. public domain. Retrieved 2026-07-13.
  4. 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.