Sebaceous gland the hair shaft. The structure consisting of hair, hair follicle, arrector pili muscles, and sebaceous gland is an epidermal invagination known as a "pilosebaceous unit". Sebaceous glands are also found in hairless areas (glabrous skin) of the eyelids, nose, penis, labia minora, the inner mucosal membrane of the cheek, and nipples. Some sebaceous glands have unique names. Sebaceous glands on the lip and mucosa of the cheek, and on the genitalia, are known as Fordyce spots, and glands on the eyelids are known as meibomian glands. Sebaceous glands of the breast are also known as Montgomery's glands. Sebaceous glands are
Holocarpha virgata lined with oily glands and hairs. The linear leaves are up to long near the base of the plant and those along the stem are much smaller. The inflorescence is made up of several short branches lined densely in small, thick, green bracts. The bracts are just a few millimeters long and are tipped with glands. At the ends of the branches are flower heads, each lined with phyllaries which are covered in knobby resin glands. Each head contains 9-25 disc florets which are yellow with black or purplish anthers. The head has a fringe of 3-7 yellow ray florets