Despite the common names ringworm and dermatophyte, the disease is caused by a fungus, not a worm or plant. Trichophyton, Microsporum, and Epidermophyton are the most common genera that cause ringworm in humans. These organisms feed on keratin, the major structural component of hair, skin and nails.
Thuja occidentalis 'Nigra'. Naturally broad, pyramidal evergreen shrub displays deep green, scalelike needles arranged in flat sprays. New light green needles emerge in spring, deepening in color as they mature. Deep green color adds contrast to winter landscape.
Nigra is the Latin feminine form of niger (black), used in biologic and anatomic names such as substantia nigra (black substance). The word niggardly (miserly) is etymologically unrelated to nigger, derived from the Old Norse word nig (stingy) and the Middle English word nigon.