Sand Lucerne is a hybrid of two other subspecies, which also back-cross and are partly fertile. There is therefore confusion with this plant. Because none of the above had yellow flowers, the photographs might not actually be of Sand Lucerne. The only way to tell for certain is to compare the seeds pods, those of Sand Lucerne are spiralled with between ½ and 1½ turns, whereas those of Lucerne are spiralled in 2 to 3 and even 4 complete turns. Alas, the seed pods were not out when the photographs were taken. But it was growing on old sand dunes near the sea.

Slight resemblance to : Bush Vetch which is also bushy with blue to purple flowers in similar heads, but the leaves are very different, being pinnate.

Superficial resemblance to : Goat's Rue, which is also shrubby, but taller, and with pinnate leaves rather than trefoil leaves.

No relation to : Sandworts nor to Sand Leek, Sand Pansy, Sand Toadflax, Sand Catchfly, Sand Spurrey or Sand Crocus [plants with similar names].

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