Studies in the genus &lt;i&gt;Riccia&lt;/i&gt; (Marchantiales) from southern Africa. 18. New species in section &lt;i&gt;Pilifer&lt;/i&gt; from the NW Cape: &lt;i&gt;R. furfuracea&lt;/i&gt;, &lt;i&gt;R. vitrea&lt;/i&gt; and &lt;i&gt;R. namaquensis&lt;/i&gt;
Bothalia