Gotu Kola
Centella asiatica
Also known as: Gotu Kola, Centella, Pennywort, Indian Pennywort, Tiger Herb
'Centella' is a diminutive of the Latin 'centum' (a hundred), perhaps referencing the many stems. 'Asiatica' denotes its Asian origin. 'Gotu kola' is derived from Sinhalese, meaning 'conical leaf.' Legend holds that tigers rolling in gotu kola were observed healing wounds – hence the folk name 'tiger herb.' It is one of the most revered plants in Ayurvedic and traditional Chinese medicine. Gotu kola is a low-growing, creeping perennial herb native to tropical and subtropical Asia, now naturalised in moist coastal ground, creek margins, garden beds, and shaded disturbed soils throughout eastern and northern Australia. It spreads by runners and root nodes, forming dense mats of kidney- to fan-shaped leaves. It has a remarkably long history of use as a medicinal and culinary herb across Sri Lanka, India, Indonesia, and Southeast Asia, where it is eaten raw in salads, blended into drinks, and taken as a daily health tonic. Note that it is also a lookalike for kidney weed (Dichondra), covered elsewhere in this guide.
When to Forage
Year-round in subtropical and tropical climates; most vigorous in warm, wet months. May die back in cold, dry periods.
Cautions
Generally very safe as a food herb in culinary quantities. Prolonged, very high-dose consumption (as a medicinal supplement) has in rare cases been associated with liver effects – culinary use poses no such risk. Avoid harvesting from areas near stormwater drains or with soil contamination. Contains photosensitising compounds – very excessive consumption may increase sun sensitivity in fair-skinned individuals. Those on sedatives, liver medications, or diuretics should check with a health professional before taking as a supplement.
Nutrition
Contains triterpenoid saponins (asiaticoside, madecassoside) with documented wound-healing and collagen-stimulating properties. Rich in vitamin C, B vitamins, and antioxidant flavonoids. Contains calcium, magnesium, potassium, and iron. Has been studied for cognitive function support, circulation improvement, and anti-anxiety effects. Widely used as a brain and longevity tonic herb in Ayurvedic medicine. Often called the 'arthritis herb' in traditional medicine, it is used to manage joint inflammation and tissue degeneration – active compounds like madecassoside provide anti-inflammatory and antioxidant benefits that can reduce cartilage erosion and joint swelling.
How to Identify
- Low, creeping herb forming dense mats; stems are thin, rooting at nodes, spreading outward along the ground.
- Leaves are the key feature: kidney- to fan-shaped, with a smooth, rounded margin that has shallow, rounded teeth. Bright green, slightly fleshy, with prominent palmate veining radiating from where the stalk attaches.
- Leaf stalk is long and slender, attaching to the leaf margin (not the centre of the leaf – distinguishing it from kidney weed's truly peltate arrangement).
- Flowers are tiny, pale pink to white, inconspicuous, borne close to the ground in small clusters at leaf axils. Easily missed.
- Mildly aromatic when crushed – a faint, green, slightly earthy smell. The leaf surface is smooth and slightly glossy.
Lookalikes
Very similar round leaves, same creeping habit. Distinguished by Dichondra's smaller, smoother leaves with a truly central stalk attachment (peltate); no rounded teeth on the margin; leaves are hairless and very small. Also edible, though less nutritionally significant. No distinct smell when crushed.
Similar leaf shape, but typically found in wetter, boggier ground; leaves often larger, peltate (stalk truly central); some species have distinctly umbelliferous flower clusters. Do not confuse – Hydrocotyle is not eaten.
Similar low, creeping, mat-forming habit with rounded leaves, but native violet leaves are more heart-shaped with a distinct notch at the stalk, and the plant produces small, unmistakable purple-and-white five-petalled flowers that gotu kola never does.
How to Forage
Harvest leaves and tender stems by pinching or cutting with scissors. A small daily handful is the traditional approach across South and Southeast Asian cuisines. Rinse thoroughly – gotu kola grows close to the ground and can collect soil and insects. Eat raw in salads or blended drinks, or lightly cook as a cooked green. The flavour is mild, slightly grassy, and faintly bitter.
Recipe — Gotu Kola Sambol (Sri Lankan Fresh Salad)
Ingredients: 2 large handfuls fresh gotu kola leaves, finely shredded; 1/4 cup freshly grated coconut (or desiccated coconut, lightly moistened); 1 small red onion or 2 shallots, very finely diced; 1 green chilli, deseeded and finely sliced (optional); juice of 1 lime; salt to taste; optional pinch of smoked paprika or toasted cumin seeds. Method: Wash and finely shred gotu kola leaves; blot dry. Combine with grated coconut, red onion, and chilli in a bowl. Add lime juice and salt; toss well with your hands, massaging slightly to combine flavours. Taste and adjust seasoning. Serve immediately as a side to rice, curries, or flatbread. Best eaten fresh – the leaves wilt and darken if left to sit. Inspo: gotu kola tonic – blend a large handful of leaves with coconut water, lime, and a little maple syrup for a daily herbal drink. Widely drunk in Sri Lanka as a health ritual.
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