Safe wood
Cholla wood
Cork bark
Cypress (swamp variety, taxodium species)
Grape vine
Madrona
Mangrove
Manzanita
Maple
Oak
Pear
Pecan
Sycamore
Unsafe Woods
Apricot
Bitter Almond
Boxwood
Cherry
Cherry Laurel
Eucalyptus
Evergreen of any kind (pine, cedar, redwood, etc.)
Hemlock
Laurel
Nectarine
Peach
Plum
Yew
Found in a LHC.com forum add text, images, video, widgets, etc...