There were a ton of these spittlebug marks on surrounding shrubs, probably forbs, in the Union Bay Natural Area. I took a small leaf and dug out a bit of the barrier to find a small yellow larvae like organism (of course I covered it up again). It was on a forb, soon to flower. I'm really not sure what kind of spittlebug this was. The bug makes this kind of casing for moisture and protection, and it is quite sticky. These bugs feed on plant saps and therefore are considered pests. However, they look worse than they really are.