Helianthus (Latin: Helianthus AnnuusL. ) , it is the annual herb that composite helianthus belongs to. Tall 1 ～ 3.5 meters. The bine is erect, circular much edges and corners, qualitative hard by white thick bristle. Normally each other gives birth to wide olivary lamina, tip acute dash forward or gradually pointed, have base give 3 arteries and veins, the brim is provided thick toothed, two sides is coarse, by wool, have long power. Capitate, diameter 10 ～ 30 centimeters, sheet is born at cauline top or branch end. Always luxuriant piece multilayer, the leaf is qualitative, fu covers with tiles shape is arranged, by long bristle, the summer blossoms, inflorescence brim gives birth to neuter maize ligulate flower, not strong. Inflorescence is mid for bisexual tubular flower, brown or purple, can strong. Achene achene of quadrature egg form, peel lignification, gray or black, call sunflower seed. Produce South America formerly, domestication is planted took Europe from North America 1510 by Spaish, use to view and admire at first. 19 centuries end, by bring a North America from Russia. China all has help advance somebody's career. Sunflower seed calls sunflower seed, often fry after making as snacks edible, delicious, also can extract sunflower seed oil to be used at edible, oil residue can become fodder.