All 89 bee plants
Traveller’s joy pollen
Clematis vitalba
Dull olive, a greenish yellow, in the green range.
FloweringJuly to September
PollenGood
NectarNone
SeasonSummer, Autumn
WhereHedgerow, Woodland
No nectar to speak of, but the hedgerow flowers give a handy pollen in a lean late-summer spell.

Easy to mistake for these
Closest pollen colours in our set, measured the same way the pollen identifier scores a match. Colour alone will not settle it, so check the flowering months and what is actually growing near your hives.
Confused with in the field
Noted by name in our own records, rather than worked out from the colour.
Out at about the same time
Saw a load like this going in?
Sample the colour against all 89 plants, then keep a forage record per hive.