See for example [[Rosales]]: in the "Families" section of the box at upper right, spaces are
missing following links. For example, the wikitext "[[Urticaceae]] ([[nettle]] family)" has been
rendered as Urticaceae(nettlefamily).
This doesn't happen in ordinary wikitext, only in the expansion of Template:Taxobox.
If the spaces are replaced by non-breaking space ( ) then the box renders correctly.