rose periwinkle flowers

acid alkaloide alkaloids angiosperm antibacterial antiinflammatory antispasmodic apocynaceae astringent bloom blooming blossom botany brighteyes cancer cape catharanthus circulatory closeup cough digestive dogbane evergreen expectorant failure family flavonoids flora flower flowers heart herb herblore medicinal natural nature periwinkle plant poisonous problems reassuring rose roseus saponins styptic tannic therapy toxic treatment vincaalkaloide vincamine vincin weakness whooping wildflower