Caryophyllaceae
Stellaria media
Chickweed · Starweed
- Part used
- aerial
- Native range
- Europe; naturalised worldwide and among the most successful weeds on the planet
- Morphology
- A sprawling annual with small oval leaves and tiny white flowers whose five petals are so deeply cleft they appear to be ten. A single line of hairs runs along one side of the stem, switching sides at each node — the reliable identification feature.
What is in it
Evidence
Essentially no controlled evidence. The topical use as a cooling demulcent is plausible and untested.
Safety
Eaten as a salad green. High saponin content causes gastrointestinal upset in quantity. Nitrate accumulation on fertilised ground is a consideration for anything eaten in bulk.
Regulatory: Permitted as a food and as a listed ingredient.
How the traditions classify it
Three systems, rating the same plant. Where they disagree, none of them is correcting the others — they are separate frameworks that arrived at their categories independently.
Historical use
Eaten as a spring green and used as a poultice for skin complaints across Europe. Fed to caged birds, which is where the common name comes from.
Recorded as history and attributed where possible. Long use establishes that a plant was widely used, not that it worked, and not that it was safe.
Worth knowing
Chickweed is included partly as an identification lesson, because it has a dangerous lookalike and a completely reliable way of telling them apart.
Stellaria media carries a single line of fine hairs running up one side of the stem, switching sides at every leaf node. Nothing else does that. Scarlet pimpernel, Lysimachia arvensis, grows in the same ground, looks broadly similar to a careless eye, and is toxic.
That is the practical form the identification problem takes for anyone gathering anything. The Belgian aristolochia disaster was a supply chain failing to check identity at industrial scale; this is the same failure at the scale of one person in a garden, and the answer in both cases is a specific checkable character rather than a general impression.
Nomenclature verified against GBIF backbone taxonomy.