the smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound. 2. Chemistry.
The cultivated saffron (saffron crocus C. sativus) flowers in the autumn and comes up every year, so it is known as a perennial plant. It does not grow wild, and is now a triploid form of the eastern Mediterranean plant called Crocus cartwrightianus. It is thought that C. cartwrightianus came from Crete.he cultivated saffron (saffron crocus C. sativus) flowers in the autumn and comes up every year, so it is known as a perennial plant. It does not grow wild, and is now a triploid form of the eastern Mediterranean plant called Crocus cartwrightianus. It is thought that C. cartwrightianus came from Crete.
Shop for Tulip Bulbs. As many gardeners know, daffodils are dependable repeaters, perennials that return year after year with more and more blooms. But tulips are somewhat different. The tulip, for all its spectacular beauty, is one of the easiest flowers to grow successfully in the garden.ll species tulips, the wild ones, are totally perennial, as are many of the minor bulbs including crocus. 1  Plant bulbs in a well-drained area. 2  Plant tulip bulbs deep -- about eight inches deep, measuring from the base of the bulb. 3  Water bulbs after planting. 4  In the spring, after the blossoms have passed their peak, clip off the flower heads ...