IPNI treats Adansonia as a single journal with three distinct runs of publication. However, these three runs do not constitute direct continuations of each others and all have different ISSNs (and in fact there is little connection between "ser. 1" and "ser. 2" other than the second's name being chosen in reference to the first):
1997-: the name returns to Adansonia with continued numbering, vol. 19- (Adansonia, ser. 3, ISSN 1280-8571 (print, no longer issued after 2018)/ISSN 1639-4798 (electronic), Wikidata Q5735523, BioOne)