Sycamore data

http://www.wood-database.com/lumber-identification/hardwoods/sycamore/
"Similar to maple, the wood of Sycamore trees is predominantly comprised of the sapwood, with some darker heartwood streaks also found in most boards.
End grain:Diffuse-porous; small pores gradually becoming less frequent from earlywood to latewood; solitary and in multiples and clusters; tyloses occasionally present; growth rings distinct due to lighter color of latewood and decreased pore frequency; rays easily visible without lens, noded; parenchyma rare or absent."

Tyloses are outgrowths on parenchyma cells of xylem vessels of secondary heartwood. When the plant is stressed by drought or infection, tyloses will fall from the sides of the cells and "dam" up the vascular tissue to prevent further damage to the plant.

Sycamore Lace Bug -The sycamore lace bug, Corythucha ciliata (Say) is a native North American insect that feeds on sycamore trees (Platanus spp., especially Platanus occidentalis L.). The bugs feed on the undersides of the leaves, initially causing a white stippling that can eventually progress into chlorotic or bronzed foliage and premature senescence of leaves.