Markup: templates/output/04-elements/forms/textarea.html
<div class="flex__12 powermail_fieldwrap">
<label for="demoformid-textarea">Your message</label>
<textarea class="" id="demoformid-textarea" rows="8" cols="48" name="" placeholder="Enter your message here"></textarea>
</div>
<div class="flex__12 powermail_fieldwrap">
<label for="demoformid-textarea-error">Your message</label>
<textarea class="" id="demoformid-textarea-error" rows="8" cols="48" name="" placeholder="Enter your message here"></textarea>
<ul class="powermail-errors-list">
<li>This field is required</li>
</ul>
</div>
Source:
assets/sass/04-elements/_elements.forms.scss
, line 421