conflorescence

A compound inflorescence consisting of two or more unit inflorescences. ... (09 Oct 1997) ...
Found on http://www.encyclo.co.uk/local/20973

conflorescence

of an inflorescence when the overall structure substantially differs from that of its individual flowers; e.g. the bottlebrush multiple -flower head of callistemons.
Found on http://en.wikipedia.org/wiki/Glossary_of_botanical_terms
No exact match found