Florida Native Shrub, Florida Swampprivet, Has Plant Bug Pest (Miridae) that was Discovered in 2010-2011.
The gooey, shmear spotting is the plant bug excrement. When scouting, you may not see the insects, but their spotting gives them away.
Tropidosteptes forestierae (Hemiptera: Heteroptera: Miridae: Mirinae): A New Species
of Plant Bug Injuring Ornamental Florida Swampprivet, Forestiera segregata
(Oleaceae), in South Florida.
authors: Thomas J. Henry, Doug L. Caldwell and Susan E. Halbert
Insecta Mundi 0240: 1–10
Published in 2012; see page 7 for pictures.