Nephelium spp. of the family Rutaceae, including at least Nephelium becarrianum, Nephelium costatum, Nephelium cuspidatum, Nephelium lappaceum, Nephelium maingayi and possibly others. Nephelium lappaceum seems to be the most commonly found.
my samples: NOTE: these pics were all taken in very bright incandescent lighting ("soft white" at 2700K) colors will vary under other lighting conditions
both sides of a sample plank of rambutan / Nephelium lappaceum --- HUGE enlargements are present. This sample was loaned to me by David Clark whom I thank for this and other contributions to the site.
end grain and end grain closeup of the piece directly above --- NOTE: the streaks along the unlabeled face that appear to be ray flakes on the unlabeled face above are in fact not ray flakes at all but as you can see pretty clearly in the end grain shot, are all cracks in the wood.
planks with both wet and dry areas, showing a dramatic color shift
both sides of a pair of planks that have been moistened for the pics
planks listed as rambutan / Nephelium appaceum. Although only the first of these was listed as figured, clearly they both are.
this image is clearly the same as the second one directly above, although that one has been rotated left and given a designation of Nephelium appaceum which THIS image did not have. Since I assume THIS is the orginal (because it's much bigger (in the enlargement), I'd guess that the one above was lifted from this one, rotated and given a slight color change and then given a designation that was not necessarily correct. Just another example of how little you can trust much of the stuff on the internet.
figured rambutan planks all from the same vendor. All of these are front/back sets. That is, the 6 pics are of 2 pairs of planks and one wide one
curly planks listed as rambutan / Nephelium lappaceum
planks that were not listed as curly but which clearly are curly