Rubiaceae
Galium aparine
Cleavers · Goosegrass · Sticky willy · Bedstraw
- Part used
- aerial
- Native range
- Europe, north Africa and Asia; naturalised worldwide
- Morphology
- A scrambling annual with square stems and whorls of narrow leaves, the whole plant covered in tiny hooked bristles that make it cling to clothing and fur. Tiny white flowers and bristly round fruit.
What is in it
Evidence
No controlled evidence. The lymphatic claim, which dominates its modern use, is untested and has no proposed mechanism.
Safety
Generally well tolerated. Contact dermatitis from the bristles. Diuretic effect is a consideration alongside prescribed diuretics.
Interactions: Possible additive with diuretics
Regulatory: Permitted 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
Used across Europe as a spring tonic, diuretic and lymphatic. The seeds were roasted as a coffee substitute — the plant is in the same family as coffee — and the stems were used as a sieve for straining milk.
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
Cleavers is a Rubiaceae, which puts it in the same family as coffee, cinchona and gardenia — and its roasted seeds really were used as a coffee substitute, which is one of the rare cases where a folk substitution turns out to have picked a genuine relative rather than a superficial lookalike.
Its dominant modern use, as a lymphatic, is worth flagging as a category with no evidential content at all. "Lymphatic herbs" and "lymphatic drainage" are staples of Western herbal and wellness practice; the lymphatic system is real and well understood, and there is no controlled evidence that any herb does anything to it. It is one of the clearest examples of a modern claim using genuine anatomy to sound like physiology.
Nomenclature verified against GBIF backbone taxonomy.