(d) : Tulip is the common name for any member of the thousands of varieties and about 100 species of bulbous perennial plants comprising the genus Tulipa of the flowering plant Family Liliaceae. A bulb is an underground vertical shoot that has modified shoot (or thickened leaf bases). As flower is regarded as a modified stem with shortened internodes and bearing at its nodes and structures that may be highly modified leaves. A flower structure forms on a modified shoot or axis with an apical meristem that does not grow continuously.