It looks similar to one I posted below that everyone thinks is Flavescens. Does yours have a mild lemony scent? Here is a picture of mine:

Here is a link that might be useful:

Thank you ramazz! Quite the same form and style, I agree, but yours look to have a purple hue in the falls?
Mine are small flowers, just 3 inches or so across, have glistening white standards with bronzey stripes on the shoulders & yellow-tipped white beards.

..falls, i meant. white falls. Rather lemon meringue standards.

Ignore the 'purple' cast on Ramazz's pic. Look at the placement of bloom on the stalk as best as you can and compare that.

The photo may have been taken on an overcast day or in evening or with different settings on the camera --- all these can contribure to a slightly different cast.

Maybe a search on Flavescens will turn up photos that look more like yours.

Yes, Yes, Flavescens! Thank you both!
These are smaller flowers than the new hybrids I have, but I know why this one is still around after all this time!