False shamrock

Oxalis triangularis A.St.-Hil.

light
Sun–part
water
Medium
tall
30 cm
wide
46 cm

Oxalidaceae

Also called Purple shamrock

Formerly Acetosella oxyptera, Acetosella papilionacea, Acetosella regnellii, Acetosella triangularis, and 14 more

When it flowers

Flowers all year in the tropics.

Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.

PetsNC State Extension lists it as toxic to dogs, cats and horses (25 Oct 2026)
PeopleNC State Extension lists it as mildly poisonous (flowers, fruits, leaves, roots, sap, seeds, stems) (25 Oct 2026)

If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.

Something wrong with it?

About it

Grows as
Tuberous geophyteKew's checklist, not yet checked
Climate
Seasonally dry tropicalKew's checklist, not yet checked
Wild in
Peru to Brazil and N. ArgentinaKew's checklist, not yet checked
Light
Full sun to part shade (3 h or more)Read from NC State Extension, one source
Height
15 cm to 46 cmRead from NC State Extension, one source
Spread
30 cm to 61 cmRead from NC State Extension, one source
Water
Average: moist, well drainedRead from NC State Extension, one source
Flowers
White, purpleRead from NC State Extension, one source
Coldest it survives
-12.2 °C (USDA zone 8a)Read from NC State Extension, one source

Not known yet: heat, hottest it survives.

In other languages (12)

Chinese
三角紫葉酢漿草, 紫葉酢醬草, 紫葉酢漿草
Chinese (China)
紫叶酢浆草, 三角紫叶酢浆草
Finnish
valkokäenkaali
Thai
ผีเสื้อราตรี
Russian
Кислица треугольная
Swedish
triangeloxalis, snöoxalis
Japanese
サンカクカタバミ, インカカタバミ, インカノカタバミ
Estonian
santa katariina jänesekapsas
Lithuanian
Raudonlapis kiškiakopūstis
Danish
sommerfuglekløver
Hebrew
חמציץ משולש (סגול)
Portuguese
Falso trevo, Trevo-roxo

Where this comes from

A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.