XSLT - get value of all nodes with the same name

I have the next XML:

<OPTION>
  <PRICES>
     <PRICE>
        <PRICE_DATE>25 Nov 2014</PRICE_DATE>
     </PRICE>
     <PRICE>
         <PRICE_DATE>26 Nov 2014</PRICE_DATE>
      </PRICE>
  </PRICES>
 </OPTION>

In my XSLT I need the value of all PRICE_DATE (25 Nov 2014 and 26 Nov 2014 ).

      <xsl:value-of select="PRICES//PRICE_DATE"/>

but the returning value is only the 25 Nov 2014 .

How to get the values of the all nodes with the same name?