Lemon tree leaves has these harden dots ontop of the leaves
13 (32) Mossel Bay Post Office Tree - Historic tree believed to have been the tree in which an old shoe was placed for exchange of messages by Portuguese seafarers in the 16th century - Dias Museum 1 Market Street Mossel Bay Western Cape S 34º 10.819’ E 22º 08.486’ Height: 8.5m Stem size: 2.3m circ; 2.66m (multi-stemmed ) Crown size: 32.1m & 33.7m
Affects Sideroxylon inerme leaves
Leaves showing convex on top and concave beneath with something white and furry in the convex parts. Growing in more shaded area beneath Schinus molle tree.
on milkwood, Sideroxylon inerme