[Taxacom] The cashew - nut or drupe?

[john.steel at botany.otago.ac.nz]

	Does anyone know of a paper giving an accurate description of the 'nut' part 
(not the aril) of the cashew (Anacardium occidentale)?  I need to determine whether it 
should be a drupe or a nut (in the sense of a dry, indehiscent, woody, single seeded, 
syncarpous fruit).

	A more daring request is for the earliest, published definition of nut!

Thanks for your tolerance,  John Steel.