Matthiola incana, known as hoary stock, is a species of flowering plant in the genus Matthiola. The common name stock usually refers to this species, though it may also be applied to the whole genus. M. incana is also known in the USA by the common name tenweeks stock. It is a common garden flower, available in a variety of colors, many of which are heavily scented and also used in floristry. reaches heights of growth of 20 to 28 centimeters thick, woody at the base and with numerous foliar scars and branches with terminal rosettes of leaves. The plant is starry, with whitish hairs.