Cereoid-UR12- schreef
Here is a more thoughtful and thoroughly researched reference on the
subject:

Spjut, R.W. (1994) A SYSTEMATIC TREATMENT OF FRUIT TYPES.
Memoires of the N. Y. Bot. Gard. vol. 70.

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Yes, I can remember providing you with this reference, on the thought you
might find it interesting. That is not to say it is generally well-accepted.
PvR