<p>In the Tang Ben Cao, it explains, &ldquo;The largest Wen Ge can be up to 3 Cun, the smallest 5 - 6 Fen.&rdquo; The 5 Fen to 3 Cun refers to the perimeter. In the Tu Jing, it explains, &ldquo;Wen Ge has stripes and should be gathered mid-March.&rdquo; Chen Cangqi explains, &ldquo;Wen Ge has stripes on the surface before it becomes rotted.&rdquo; Wen Ge refers to small clams with purple spots on the surface.</p>
