It is not a disease. The name suggests illness, a blight upon the crop. But the Grass Smut is a delicacy in many cultures, known as huitlacoche in Mexico. It does not kill the plant. It transforms it. The fungus infects the kernels of maize, causing them to swell into large, greyish-white galls. These galls are filled with black spores, a powdery mass that bursts when mature. It is a parasite, but not a lethal one. It feeds on the host, but leaves it standing. Threats are minimal. The species is widespread and common. In fact, it is often encouraged in agricultural systems where it is valued as food. However, in commercial maize production, it is considered a pest. Fungicides are used to control its spread. This creates a paradox: the fungus is both crop and weed, depending on the perspective of the farmer. It thrives in warm, humid conditions, particularly when the plant is stressed by drought or damage. The Grass Smut is found throughout New Zealand, wherever maize is grown. It is common in home gardens, market gardens, and large-scale agricultural fields. It fruits in summer and autumn, coinciding with the maturation of the maize cobs. It is not picky about its host, though it prefers maize. It can also infect other grasses, but rarely with the same vigour. Its presence is a sign of a healthy, functioning ecosystem. Where it grows, the balance between plant and fungus is maintained. This fungus is parasitic. It does not decompose dead wood or leaf litter. Instead, it feeds on living tissue, specifically the developing kernels of maize. In doing so, it alters the structure of the plant. The galls are nutritious, rich in protein and amino acids. They are harvested before they burst, when the interior is still white and firm. If left too long, they turn black and powdery, releasing spores into the air. The galls are irregular in shape, often resembling swollen tumors. They are covered in a thin, silvery skin that protects the spores within. When this skin breaks, the black powder is released. It stains everything it touches. It is messy, chaotic, and undeniable. Unlike the tidy mushrooms of the forest floor, the Grass Smut is a disruption. It carries on.