Black Spot On Broad Beans

[jaden]

I have just grown a broad bean plant and I noticed a singular hardish black spot on some of the smaller leaves (none on the more mature big ones). Is this an infection or is this normal?

 

[DirtMechanic]

I have just grown a broad bean plant and I noticed a singular hardish black spot on some of the smaller leaves (none on the more mature big ones). Is this an infection or is this normal?

Well, haha plants are usually green! Got a picture? is it rased or sunken? A yellow ring or just black? Is the inner part dying?