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.
Diamond-flowers or bluet stems form clumps and become branched in the upper portion. Its small but abundant flowers are pink or white, trumpet-shaped, four-lobed, and in clusters at the ends of stiff branches. Leaves are very narrow and thread-like with rolled margins. Nigricans so named because the leaves turn black when dry.