The bulbs of high quality Narcissus in South America are large in size. They are generally flat and hard in shape. The striations of the longitudinal veins of the epidermis are wide, the middle membrane is tight, the skin color is bright, the root disc is wide and fat, and there are symmetrical small bulbs beside the main bulb.
The corm of high quality is bright and dark brown. In addition, the capsule is intact, no signs of rot and insect damage.
It is one of the most important means to select the South American narcissus to judge the number of arrows by pressing. Hold the bulb with your thumb and index finger and press it a little harder. The outline of the hand is columnar. The ones that are firm and elastic are mostly arrow. The ones that are soft and elastic are usually leaf buds.
