13 Dec
2010
13 Dec
'10
15:57
"H.3A.1. The multiplication sign ×, indicating the hybrid nature of a taxon, should be placed so as to express that it belongs with the name or epithet but is not actually part of it. [...] should depend on what best serves readability."
My reading of this would be that a non-breaking space, possibly narrower, would satisfy both this statement and correct typographic typesetting (which does not endorse "M. ×piperita" -- the multiplication sign is designed to be used with spacing).
Gregor