Complex sentence: The two bulbs are inequal, ovoid, 10 to 18 mm long, 6 to 10 mm wide, and they are wrapped in a coriaceus bright-brown common tunic.
Split into simpler sentences: The two bulbs are inequal, ovoid, 10 to 18 mm long, 6 to 10 mm wide. They are wrapped in a coriaceus bright brown common tunic.