Hippocrepis emerus(L.) Lassen

Scorpion Sennascorpion senna

WFO wfo-0000205514 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Hippocrepis emerus, photographed by Felicia Seichter
fig. a Felicia Seichter, CC BY 4.0 / 2022-05-02 / obs. 195995171

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 27 botanical countries

Regions where Hippocrepis emerus is native: Libya, Tunisia, Cyprus, East Aegean Is., Lebanon-Syria, North Caucasus, Türkiye, Albania, Austria, Belgium, Bulgaria, Corse, Czechia-Slovakia, France, Germany, Greece, Hungary, Italy, Krym, Norway, NW. Balkan Pen., Romania, Sicilia, Spain, Sweden, Switzerland, Türkiye-in-Europe LibyaTunisiaCyprusEast Aegean Is.Lebanon-SyriaNorth CaucasusTürkiyeAlbaniaAustriaBelgiumBulgariaCorseCzechia-SlovakiaFranceGermanyGreeceHungaryItalyKrymNorwayNW. Balkan Pen.RomaniaSiciliaSpainSwedenSwitzerlandTürkiye-in-Europe
Native distribution of Hippocrepis emerus, 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
Albania ALB EUROPE
Austria AUT
Belgium BGM
Bulgaria BUL
Corse COR
Czechia-Slovakia CZE
France FRA
Germany GER
Greece GRC
Hungary HUN
Italy ITA
Krym KRY
Norway NOR
NW. Balkan Pen. YUG
Romania ROM
Sicilia SIC
Spain SPA
Sweden SWE
Switzerland SWI
Türkiye-in-Europe TUE
Cyprus CYP ASIA-TEMPERATE
East Aegean Is. EAI
Lebanon-Syria LBS
North Caucasus NCS
Türkiye TUR
Libya LBY AFRICA
Tunisia TUN

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 665 in flower of 764 examined

Proportion of examined Hippocrepis emerus in flower, by month
Month In flower Examined Share 95% interval
Jan 9 11 82% 52% to 95%
Feb 19 21 90% 71% to 97%
Mar 84 95 88% 80% to 93%
Apr 325 339 96% 93% to 98%
May 174 191 91% 86% to 94%
Jun 22 34 65% 48% to 79%
Jul 3 12 25% 9% to 53%
Aug 5 15 33% 15% to 58%
Sep 3 10 30% 11% to 60%
Oct 7 16 44% 23% to 67%
Nov 4 7 57% 25% to 84%
Dec 10 13 77% 50% to 92%

Peak flowering in Apr. Each bar is the share of Hippocrepis emerus 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. 665 of 764 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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.

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.

  • Coronilla austriaca (Heimerl) Fritsch
  • Coronilla emera St.-Lag.
  • Coronilla emeroides Boiss. & Spruner
  • Coronilla emeroides var. humilis Heldr. & Halácsy
  • Coronilla emerus L.
  • Coronilla emerus subsp. emeroides (Boiss. & Spruner) Holmboe
  • Coronilla emerus subsp. emerus
  • Coronilla emerus var. minor Gaudin
  • Coronilla emerus var. monophylla Rikli
  • Coronilla florida Salisb.
  • Coronilla pauciflora Lam.
  • Coronilla vaginalis Ledeb.
  • Emerus alpestris Scheele
  • Emerus caesalpina Medik.
  • Emerus fruticosus Hornem.
  • Emerus hortensis Desv.
  • Emerus major Desv.
  • Emerus major subsp. emeroides (Boiss. & Spruner) Soldano & F.Conti
  • Emerus minor Desv.
  • Hippocrepis emeroides (Boiss. & Spruner) Czerep.

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. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. 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.