A '''bulb''' is an underground structure of some plants, such as the [[onion]] and the [[tulip]]. The bulb has layers or scales, which are actually modified [[leaf|leaves]], for storing [[nutrient]]s during the plant's [[dormancy]]. The layers or scales are attached at the base to a basal plate, which is a modified [[stem]], from which the [[root]]s grow when the plant grows.<ref>[http://www.bulb.com/ibc/us_en/publiek/information.jsf/bulbs_gardening/bulb-basics/What-s-a-bulb-.html;jsessionid=65207BD7311C78E2B2C34F0BE3DBB1D7 What's a bulb?]</ref> | A '''bulb''' is an underground structure of some plants, such as the [[onion]] and the [[tulip]]. The bulb has layers or scales, which are actually modified [[leaf|leaves]], for storing [[nutrient]]s during the plant's [[dormancy]]. The layers or scales are attached at the base to a basal plate, which is a modified [[stem]], from which the [[root]]s grow when the plant grows.<ref>[http://www.bulb.com/ibc/us_en/publiek/information.jsf/bulbs_gardening/bulb-basics/What-s-a-bulb-.html;jsessionid=65207BD7311C78E2B2C34F0BE3DBB1D7 What's a bulb?]</ref> |