Easily mis-identified as : Spiny Restharrow but that has hard sharp spines, whereas Common Restharrow doesn't usually have any, but when it does, they are soft and pliable. Spiny Restharrow has slightly redder flowers; stems with hairs in two rows rather than all way around; leaves that are narrower; is usually erect rather than creeping or rooting. Spiny Restharrow is much less ubiquitous than is Common Restharrow.

Hybridises with : Spiny Restharrow (Ononis spinosa) to produce Ononis × pseudohircina, but there are so few places left in the UK where the hybrid is now found that the reader is highly unlikely to come across it. It does not inhabit the Sefton Coastline where these photos were taken.

There is also a sub-species Ononis spinosa ssp. maritima but that is now only found in one, perhaps two, hectads in the UK, that are nowhere near the Sefton Coastline.

Uniquely identifiable characteristics : Restharrows are easily recognised, but not so easily distinguished between.

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