Went out this morning to catch the selective aspect of the low angle of the early morning light.
The light was falling on some of the catmint in the foreground but had not reached the catmint in the background. Used a 400 mm lens to isolate the catmint which was in the early morning light.
Interesting shot. At first I thought it was a shadow on the background, but the more I look at it, I realize what you had written. It's another stalk not lit up.
Would be a shame to eat it.