A comparative pharmacognostic evaluation of anatomical and chemical characters of &lt;em&gt;Nardostachys jatamansi&lt;/em&gt; (D.Don) DC. (Jatamansa) and &lt;em&gt;Valeriana mooni&lt;/em&gt; Arn. ex C.B.Clarke (Lanka thuwarala)
Sri Lankan journal of biology/Sri Lankan Journal of Biology