Lathyrus latifolius (broad-leaved sweet pea)

Plate 1 figs. a–h

Lathyrus latifolius, photographed by Lauren Gillett — fig. a Lauren Gillett, CC BY 4.0 / 2022-06-11 / obs. 205748446

Lathyrus latifolius, photographed by Eleftherios Katsillis — fig. b Eleftherios Katsillis, CC BY 4.0 / obs. 204415763

Lathyrus latifolius, photographed by Pete Bradshaw — fig. c Pete Bradshaw, CC BY 4.0 / obs. 205172055

Lathyrus latifolius, photographed by Andrew Tree — fig. d Andrew Tree, CC BY 4.0 / obs. 203236586

Lathyrus latifolius, photographed by Brian Finzel — fig. e Brian Finzel, CC BY-SA 4.0 / obs. 202608704

Lathyrus latifolius, photographed by Jochen Essig — fig. f Jochen Essig, CC BY 4.0 / obs. 200267538

Lathyrus latifolius, photographed by Hydrocycler (Elizabeth Dougherty) — fig. g Hydrocycler (Elizabeth Dougherty), CC BY 4.0 / obs. 201267181

Lathyrus latifolius, photographed by Vasily Reinkymov — fig. h Vasily Reinkymov, CC0 1.0 / obs. 199825289

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.

Flowering n = 3,973 observations

289

1213

1104

644

368

114

Flowering observations of Lathyrus latifolius by month
Month	Observations
Jan	62
Feb	21
Mar	18
Apr	55
May	289
Jun	1213
Jul	1104
Aug	644
Sep	368
Oct	114
Nov	37
Dec	48

Peak flowering in Jun, from 3,973 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 44 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.

Lathyrus algericus Ginzb.
Lathyrus angustifolius Martrin-Donos
Lathyrus brachyphyllus Schur
Lathyrus brachyterus Alef.
Lathyrus denticulatus Kit. ex Jáv.
Lathyrus ensifolius Badarò
Lathyrus grandiflorus Láng
Lathyrus heterophyllus Gouan
Lathyrus laevigatus Arechav.
Lathyrus latifolius f. albiflorus Moldenke
Lathyrus latifolius f. denticulatus (Kit. ex Jáv.) Soó
Lathyrus latifolius f. rubicundus Moldenke
Lathyrus latifolius subsp. ensifolius (Badarò) Nyman
Lathyrus latifolius var. albus Alef.
Lathyrus latifolius var. algericus (Ginzb.) Maire
Lathyrus latifolius var. angustatus Gremli
Lathyrus latifolius var. angustifolius W.D.J.Koch
Lathyrus latifolius var. ensifolius (Badarò) Batt.
Lathyrus latifolius var. genuinus Godr.
Lathyrus latifolius var. latifolius
Lathyrus latifolius var. longifolius Wimm. & Grab.
Lathyrus latifolius var. mesatlanticus Maire
Lathyrus latifolius var. monspeliensis Burnat
Lathyrus latifolius var. neglectus Puel

and 20 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.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.