I’m trying to get more than ten results to show when I do a search. Even though I set (for testing purposes) the reading settings to show 100 posts, I only get ten results where I know I should be getting 14. The test site is here: http://hardyferns.org/hfftest/fern-database/ — if you search for “evergreen” (should be 14) you only see 10. Here’s the code for the custom results page, any help would be greatly appreciated:

<div id="primary" class="content-area">
		<main id="main" class="site-main">
	<div class="flexcontainer">
			<div class="plant-content listall">
		<?php if ( have_posts() ) : ?>
					<h1 class="page-title">Search Results</h1>
	<ul>
	<?php 
	while ( have_posts() ) : the_post(); ?>
			 <li><a href="<?php the_permalink(); ?>" title="<?php printf( esc_attr__( 'Permalink to %s', 'hff' ), the_title_attribute( 'echo=0' ) ); ?>" rel="bookmark"><?php the_field('botanical_name'); ?>&nbsp;(<?php the_field('common_name'); ?>)</a></li>
<?php endwhile; ?>
		        </ul>
			<?php else : ?>
				<article id="post-0" class="post no-results not-found" role="article">
					<header class="entry-header">
						<h1 class="entry-title"><?php _e( 'No Ferns Found', 'themename' ); ?></h1>
					</header><!-- .entry-header -->
					<div class="entry-content">
                    	<div class="text-wrap">
						<p>Sorry, but nothing matched your search criteria. If you are unsure of the spelling, try using the "Search by Name" field and typing in only a partial name, for example "ble" instead of "blechnum" or "wood" instead of "woodwardia".</p>
                        </div>
					</div><!-- .entry-content -->
				</article><!-- #post-0 -->
			<?php endif; ?>
		</div><!-- .plant-content -->
        <div class="plantsearch">
   			<?php get_sidebar('ferns'); ?>
  		</div>
  </div>
</main><!-- #main -->
	</div><!-- #primary -->