You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaicontinue="Pink_Tip_Greasy_pods_nearly_done.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="304" ns="6" title="File:Lohrey&#039;s Special cotyledons.jpg" />
      <page pageid="301" ns="6" title="File:Lohrey&#039;s Special seeds.jpg" />
      <page pageid="302" ns="6" title="File:Lohrey&#039;s Special seeds fresh.jpg" />
      <page pageid="300" ns="6" title="File:Lohrey&#039;s Special seeds fresh dry.jpg" />
      <page pageid="305" ns="6" title="File:Lohrey&#039;s Special sprout.jpg" />
      <page pageid="306" ns="6" title="File:Lohrey&#039;s Special vine 2.jpg" />
      <page pageid="291" ns="6" title="File:Pink Tip Greasy flower bud and old.jpg" />
      <page pageid="293" ns="6" title="File:Pink Tip Greasy flower mid.jpg" />
      <page pageid="292" ns="6" title="File:Pink Tip Greasy leaf.jpg" />
      <page pageid="294" ns="6" title="File:Pink Tip Greasy pods full.jpg" />
    </pages>
  </query>
</api>