Color enhanced scanning electron micrograph (SEM) of the petal of a cowslip flower (Primula veris). Cowslip, also known as primrose, is of the family Primulaceae. Glandular hairs can be seen on the surface of the leaf. The herb is used medicinally in antirheumatic and anti-inflammatory salves. Roots and blooms are used to make tea to be taken as a sedative, kidney stimulant, and for cough. Magnification: 230x