Oxalis triangularis A. St.-Hil., Fl. Bras. Merid. (quarto ed.) 1: 102 102 1825. (Syn: Acetosella oxyptera (Prog.) Kuntze; Acetosella triangularis (A.St.-Hil.) Kuntze; Acetosella yapacaniensis O.Kuntze; Oxalis delta Vell.; Oxalis glaberrima Norlind; Oxalis oxyptera Progel; Oxalis tenuis R.Knuth (ambiguous synonym); Oxalis tenuiscaposa R. Knuth; Oxalis yapacaniensis (Kuntze) K. Schum.);
Argentina (Corrientes, Misiones, San Juan), S-Brazil (Parana, Rio Grande do Sul, Santa Catarina), Paraguay (Alto Paraguay, Central, Cordillera, Guaira, Paraguari), SE-Brazil (Minas Gerais, Sao Paulo, Rio de Janeiro), Colombia (Meta), Bolivia (Beni, Chuquisaca, Cochabamba, La Paz, Santa Cruz, Tarija) as per Catalogue of life;
Purple Shamrock, Wood Sorrel, False Shamrock ‘Atropurpurea’;


Purple shamrock (Plant 138 SMP):
A garden plant from oxalidaceae family.
I think this is Purple shamrock.
Oxalis regnellii atropurpurea

Yes purple oxalis, get light mauve flowers, your flower is perhaps a day or two old… with rolled over edges, when it first opens the petals are arranged in a deep v around the ovary and long …
small seed pods if appropriate pollinators are around..

Beautiful plant. Never thought Oxalis could be used in garden….


Balsaminaceae, Geraniaceae and Oxalidaceae Week: Oxalidaceae :: Oxalis regnellii Pune : 1 image.
Oxalis regnelli
A potted garden plant. Ornamental Purple shamrock.

Adding a closer flower picture.

Correct name O. triangularis
Pl. see the thread


Photograph for Flora photo of the Year 2012:
Finally thought i would post this photo of Oxalis triangularis that i clicked in my garden. I never thought these unassuming, soft petalled flowers would look so beautiful in the evening sunlight! i was really lucky that evening… Hope its not too bad

Awesome….. great great great shot


Balsaminaceae, Geraniaceae and Oxalidaceae Week : Oxalis regnellii var triangularis : Jijamata Udyan,Mumbai : For validation : 050313 : AK-8:

Kindly validate the above seen in Jijamata Udyan, Mumbai during Dec,2007.
The correct id is Oxalis regnellii var. triangularis or Oxalis regnellii atropurpurea?
Common name Purple Shamrock.
A cultivated, ornamental, potted plant.
Please confirm id and correct me if wrong.

Very good upload … but the correct name is O. triangularis A. St.Hil., 1825, It can’t be O. regnellii var. triangularis as O. regnellii Miq., 1849 is a later name.

Came across this herb at “Botanical Garden, Nagpur”.
Bot.name: Oxalis triangularis
Family: Oxiladiceae
Plant Habit: Herb
Habitat: Cultivated


Sorrell : 4 posts by 4 authors. Attachments (1).
I photographed this in Jabalpur in SFRI
Purple coloured Broad Leaf Sorrell with pinkish flowers.
Sorry for bad quality of photograph.

I think it is Oxalis triangularis.

Oxalis triangularis

Oxalis and zitronengeranie from my garden. : 1 post by 1 author. 2 correct images.

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Oxalis triangularis A. St.-Hil. (accepted name) : 3 posts by 2 authors. Attachments (4)

Location : Panchthar, Nepal 
Date : 20 April 2017
Altitude : 4000 ft.

It is introduced.

Attachments (2).  3 posts by 2 authors.
Here I’m sharing the Oxalis triangularis member of Family Oxalidaceae,
Pz validate d Id_I hope its a Oxalis triangularis !!
Location – Hanging Garden, Mumbai
Date – 13.02.2013


Oxalis triangulare : 6 posts by 3 authors. Attachments (2)
Sharing photos of Oxalis triangulare cultivated in Mahe. Photographed in November, 2019

Close up of a flower attached.
Attachments (1)

Yes, …


Swamy/New series/ID/94 – Oxalis sps: 3 images.
I am forwarding herewith the photographs of an ornamental plant. Photographed in Mysore during ‘Flower show  October, 2022’.  For me the plant I is Oxalis sps. Please confirm the ID or suggest new ID.

To me it looks like Oxalis triangularis (Purple Shamrock).

http://www.llifle.com/Oxalis_triangularis (Keys between subsp. triangularis and subsp. papilionacea)