Lathyrus hirsutusL.

Caley PeaCaley peaHairy VetchlingRough PeaWinterpeahairy vetchling

WFO wfo-0000212684 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Lathyrus hirsutus, photographed by saltyhiker
fig. a saltyhiker, CC BY 4.0 / 2022-06-11 / obs. 205231069
Lathyrus hirsutus, photographed by Annika Lindqvist
fig. b Annika Lindqvist, CC BY 4.0 / obs. 205666777
Lathyrus hirsutus, photographed by Mark G
fig. c Mark G, CC0 1.0 / obs. 203634836
Lathyrus hirsutus, photographed by saltyhiker
fig. d saltyhiker, CC BY 4.0 / obs. 196253055
Lathyrus hirsutus, photographed by Tim Johnson
fig. e Tim Johnson, CC BY 4.0 / obs. 175900976
Lathyrus hirsutus, photographed by Виктория Билоус
fig. f Виктория Билоус, CC BY 4.0 / obs. 141922045
Lathyrus hirsutus, photographed by Eric Knight
fig. g Eric Knight, CC BY 4.0 / obs. 136849742
Lathyrus hirsutus, photographed by Paul Cook
fig. h Paul Cook, CC BY 4.0 / obs. 136335509

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 42 botanical countries

Regions where Lathyrus hirsutus is native: Algeria, Egypt, Morocco, Tunisia, Afghanistan, Iran, Iraq, Kirgizstan, Lebanon-Syria, North Caucasus, Palestine, Tadzhikistan, Transcaucasus, Türkiye, Turkmenistan, Uzbekistan, Pakistan, West Himalaya, Albania, Austria, Baleares, Belgium, Bulgaria, Corse, Czechia-Slovakia, France, Germany, Greece, Hungary, Italy, Krym, NW. Balkan Pen., Poland, Portugal, Romania, Sardegna, Sicilia, South European Russia, Spain, Switzerland, Türkiye-in-Europe, Ukraine AlgeriaEgyptMoroccoTunisiaAfghanistanIranIraqKirgizstanLebanon-SyriaNorth CaucasusPalestineTadzhikistanTranscaucasusTürkiyeTurkmenistanUzbekistanPakistanWest HimalayaAlbaniaAustriaBelgiumBulgariaCorseCzechia-SlovakiaFranceGermanyGreeceHungaryItalyKrymNW. Balkan Pen.PolandPortugalRomaniaSiciliaSouth European RussiaSpainSwitzerlandTürkiye-in-EuropeUkraine BalearesSardegna
Native distribution of Lathyrus hirsutus, 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.
RegionTDWG codeContinent
Albania ALB EUROPE
Austria AUT
Baleares BAL
Belgium BGM
Bulgaria BUL
Corse COR
Czechia-Slovakia CZE
France FRA
Germany GER
Greece GRC
Hungary HUN
Italy ITA
Krym KRY
NW. Balkan Pen. YUG
Poland POL
Portugal POR
Romania ROM
Sardegna SAR
Sicilia SIC
South European Russia RUS
Spain SPA
Switzerland SWI
Türkiye-in-Europe TUE
Ukraine UKR
Afghanistan AFG ASIA-TEMPERATE
Iran IRN
Iraq IRQ
Kirgizstan KGZ
Lebanon-Syria LBS
North Caucasus NCS
Palestine PAL
Tadzhikistan TZK
Transcaucasus TCS
Türkiye TUR
Turkmenistan TKM
Uzbekistan UZB
Algeria ALG AFRICA
Egypt EGY
Morocco MOR
Tunisia TUN
Pakistan PAK ASIA-TROPICAL
West Himalaya WHM

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 299 in flower of 307 examined

Peak flowering in May. Each bar is the share of Lathyrus hirsutus 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. 299 of 307 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 7 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 1,994 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -2.4 °C 3.7 °C 8.0 °C
Warmest month, mean daily high 24.2 °C 34.1 °C 34.9 °C
Annual rainfall 660 mm 1,009 mm 1,416 mm
Rainfall in the driest quarter 47 mm 186 mm 273 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 1,994 research-grade observations of Lathyrus hirsutus 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 15 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.

  • Lastila hirsuta (L.) Alef.
  • Lastila hirsuta var. annua Alef.
  • Lastila hirsuta var. biennis Alef.
  • Lathyrus cicer Hablitz
  • Lathyrus coerulescens Boiss. & Reut.
  • Lathyrus hirsutus f. brevipedunculatus Cout.
  • Lathyrus hirsutus var. brevipedunculatus Cout.
  • Lathyrus hirsutus var. ecirrhosus Schur
  • Lathyrus hirtus Lam.
  • Lathyrus leptophyllus K.Koch ex Boiss.
  • Lathyrus variegatus Host
  • Orobus glabratus Nyman
  • Orobus hirsutus var. glabriusculus Ser.
  • Orobus lathyroides Hablitz
  • Pisum hirsutum (L.) E.H.L.Krause

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.