The dye that keeps on giving, a little goes a long way! 50 grams of heartwood chips will easily dye 200 grams of fibre. 
This is one of those Old World dyes that were massively used from around 1600 to 1850 in the dye industry. Used to make madder a bit fiercer, or as an under layer for indigo for beautiful greens.
 
Origin: Brazil
Part used: heartwood
Colour range: yellows, green
Mordant: not needed but alum will improve light fastness
Light fastness: Good
WOF: 25% 
Cold dyeing: no
Hot dyeing: yes
Low Impact Method: no