All 89 bee plants
Red clover pollen
Trifolium pratense
Dull reddish brown, in the brown range.
FloweringMay to September
PollenFair
NectarMinor
SeasonSpring, Summer, Autumn
WhereFarmland, Hedgerow, Waste and verge
The florets run too deep for most colonies, so the loads that do come in are a modest bonus.

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.