Wild Flora Congress grass (Parthenium hysterophorusa) is an agricultural waste crop, a perennial weed grass commonly called as carrot grass, chatak chandni etc. Congress grass is one of the ten feared 25 Easy Outdoor Plants for All Gardeners An image of the 'New Kreterbuch,' a historical herbal book documenting medicinal plants and their uses. It is an early example of botanical illustration and herbal medicine documentation from the Renaissance period Spanish bayonet Sydney Weeds Network