Oxalis species may be either annuals or perennials, characterized by fibrous, bulb-like, or rhizomatous root systems. The foliage typically features palmately divided leaves, while the flowers are mostly funnel- or bowl-shaped and tend to close during overcast conditions and at night.

Oxalis tortuosa

This perennial plant, typically growing 15-30 cm tall during its blooming period, forms clumps and has a bulbous structure. Its leaves resemble those of clover, featuring triangular leaflets that may be green or deep purple, often displaying shades of lighter or darker purple. In summer, slender stems rise above the foliage, supporting umbels of funnel-shaped flowers in white or pale pink.

Oxalis triangularis

Oxalis triangularis 'Birgit'

Oxalis triangularis 'Cupido'

Oxalis triangularis 'Marmer' (v)

Oxalis triangularis 'Mijke' is a bulbous perennial that typically reaches a height of 20 cm during its flowering phase. It features clover-like foliage made up of triangular leaflets in a vibrant purple hue. In summer, slender stems emerge to support umbels of funnel-shaped flowers that are pale whitish-purple, rising gracefully above the leaves.

Oxalis triangularis 'Mijke'

Oxalis triangularis Burgundy Wine ('JR Oxburwi') (Xalis Series)

This is a bulbous plant that is deciduous and enters dormancy during winter. It is sensitive to frost and thrives in warmer conditions. From spring through autumn, it showcases purple leaves, while in the summer, it produces star-shaped flowers that range from white to pale pink.

Oxalis triangularis subsp. papilionacea

Oxalis triangularis subsp. papilionacea 'Atropurpurea'

Oxalis triangularis subsp. papilionacea 'Jr Oxblavel'PBR

Oxalis triangularis subsp. papilionacea 'Jr Oxburwi'PBR

Oxalis triangularis subsp. papilionacea 'Jr Oxfroja'PBR

Oxalis triangularis subsp. papilionacea rosea

This bulbous perennial typically reaches a height of about 20 cm during its flowering phase. It features a cluster of triangular leaves resembling a shamrock, displaying a rich blend of purple-maroon and wine-red hues that fold up at night. In summer, slender stems produce small, trumpet-shaped flowers that are pale pink to white. While commonly cultivated as a houseplant, it can also thrive in sheltered outdoor gardens in the milder regions of the UK.

Oxalis triangularis subsp. triangularis

Oxalis truncatula

This perennial plant features sprawling growth and produces edible, fleshy tubers that can be red or yellow. It has succulent stems and trifoliate leaves that are either green or purple. During the summer, it bears small clusters of yellow, funnel-shaped flowers measuring about 2 cm in diameter.

Oxalis tuberosa

Oxalis tuberosa 'Amarillo'

Oxalis tuberosa 'Baumi Golden'

Oxalis tuberosa 'Bolivian Giant'

Oxalis tuberosa 'Fat Red'

Oxalis tuberosa 'Fat White'

Oxalis tuberosa 'Mexican Red'

Oxalis tuberosa 'Polar Bere'

Oxalis tuberosa Giggles

Oxalis tuberosa blush

Oxalis tuberosa golden red node

Oxalis tuberosa orange

Oxalis tuberosa pink-flowered

Oxalis tuberosa red-flowered

Oxalis tuberosa scarlet-flowered, white-eye

Oxalis tuberosa yellow

Oxalis valdiviensis

Oxalis versicolor is a bulbous perennial that reaches a height of 8 cm. It produces a cluster of light green foliage made up of three slender leaflets. From late summer through winter, it showcases funnel-shaped white blossoms edged in crimson, creating a striped appearance when in bud.

Oxalis versicolor

Oxalis versicolor 'Clove Ball'

Oxalis versicolor 'Golden Cape'

Oxalis vespertilionis Zucc.

Oxalis violacea

Oxalis virginea

Oxalis virgosa

Oxalis vulcanicola is a bulbous perennial known for its spreading habit and fleshy stems. The leaves are distinctly trilobed and exhibit a green hue that transitions to a purple-pink shade under sunlight. From summer to autumn, this plant produces small, star-like yellow flowers that emerge on slender purple stems. Notably, the foliage exhibits phototropic behavior, adjusting its position to track the sun, and the leaves often appear to tremble as they fold up at dusk.

Oxalis vulcanicola

Oxalis vulcanicola 'Burgundy'

Oxalis vulcanicola 'Molten Lava'

A bulbous, deciduous perennial that spreads through fleshy stems, Oxalis vulcanicola 'Plum Crazy' features distinctive trilobed leaves in a purple-pink hue. From summer into autumn, it produces star-shaped yellow blooms.

Oxalis vulcanicola 'Plum Crazy' (v)

This perennial plant, reaching heights and widths of up to 30 cm, has a spreading and semi-trailing growth habit. Its reddish stems support trifoliate leaves, which display ovate leaflets that are pinkish-orange in spring. As summer arrives, the foliage transitions to a greener hue, ultimately deepening to magenta in autumn. During spring and summer, small yellow flowers emerge in contrasting umbels.

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