View source for Template:EFloras/url

http://www.efloras.org/florataxon.aspx?flora_id={{#switch: {{{flora_id|}}}
   |FNA=1
   |FOC=2
   |#default={{{flora_id|}}}
   }}&taxon_id=<!--
-->{{#if:{{{taxon_id|}}}
      |{{{taxon_id}}}
      |{{#switch: {{uc:{{{flora_id|}}}}}
         |1
         |FNA={{#property:P1727}}<!-- Flora of North America taxon ID -->
         |2
         |FOC={{#property:P1747}}<!-- Flora of China ID -->
         |#default=<!-- how to trigger error? -->
         }}
      }}