Indian Wood-Sorrel (Yellow Sorrel)

Indian wood-sorrel (Oxalis corniculata, khatti booti or amrul) is the small, tart, creeping herb that volunteers in orchards, gardens, and damp shady corners across the Punjab plains, the KPK hills, and the Pothohar. It is a low groundcover with clover-like leaves, slender yellow flowers, and a sharp lemony taste, and unlike most of this batch it is genuinely a plant you might welcome — the leaves are eaten and used in household remedies.¹ It is a mild weed, but a useful one.

Where it thrives

Wood-sorrel likes moisture and a little shade. It is a low, prostrate creeper reaching only about 10 cm, rooting as it spreads, and it settles into the cooler, damper microclimates of irrigated orchards, garden beds, lawns, and shaded ground.¹ That makes the KPK hills and Pothohar, and the watered parts of the Punjab plains, comfortable for it. It is a secondary-stage opportunist rather than a desert pioneer: it follows shade and water rather than colonising open sand.

Role in the system

In a guild it works as a low secondary-stage groundcover. The creeping mat covers bare soil under trees and between plants, helping hold moisture and suppress other weeds, and the soft growth breaks down readily as mulch. Because it seeks the understorey, it fills the shaded ground layer of an orchard or food forest without competing with the canopy — the kind of self-sown living mulch that the understorey question during the secondary stage is really about. It is shallow-rooted and easily pulled, so unlike bindweed it never gets away from you.

Uses and medicine

The tart leaves and young shoots are edible raw in small amounts or cooked as a sour potherb, best combined with milder greens, and the clean lemony flavour comes from their oxalic acid content.¹ The plant is a useful source of vitamin C and carries calcium, iron, and beta-carotene besides, and it has a long medicinal record across its range: the leaf and juice have been used for influenza and fevers, urinary-tract complaints, enteritis and diarrhoea, mouth sores and sore throats, and applied to sprains, minor wounds, and insect or snake bites.¹ In parts of the subcontinent the greens are a seasonal food, gathered from around the turn of the year through the cooler months.¹ On a farm with an orchard floor or kitchen garden, that makes it a free, self-renewing green and household remedy you mostly just have to leave alone.

Cautions

The one real caution is the oxalic acid that gives the plant its flavour: eaten in quantity it can be harmful, it binds calcium, and it is best avoided by anyone prone to kidney stones.¹ Eaten sparingly as a tart green it is fine for most people. As a weed it is mild — it can seed itself around a watered bed and turn up between paving and in pots, but its shallow roots make it simple to thin or pull by hand, so it never becomes the problem a deep-rooted creeper does. Keep it where you want ground cover and out of seedling trays, and it earns its place.

Sources

1. Plants For A Future. “Oxalis corniculata — Yellow Sorrel, Creeping woodsorrel.” PFAF Plant Database.