Stewart Robert Hinsley schreef
As we've only seen a secondary source, it is always possible that in his
paper he did propose conservation. (Are there any possible grounds for
rejecting Cedrus or Swietenia alternifolia?)

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All proposals for conservation / rejecting are published in Taxon.
If it is not in Taxon it does not count

Grounds for rejection would be that it is an upsetting change.
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BTW, do you know what happened to the proposal to conserve Adansonia
gregori?

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The very latest news (unpublished): Adansonia gregorii is here to stay!
PvR