The surname Nguyen is believed to have originated in the Chinese surname Ruan (in the Mandarin language) or Yuen (Cantonese), owing to Chinaâs long domination over Vietnam.
Tinea nigra is a fungal infection that is mainly seen on the palms of the hands or soles of the feet causing a dark brown to black discoloration of the affected skin. The word tinea means a fungal infection and nigra means black.
Brown leaves on a geranium plant is often a sign of fungal problem. Root rot, also known as water mold, is caused by an attack of Pythium fungi at the roots, likely the result of poor soil drainage. This disease also causes roots to turn from white to black or gray. Browning on geranium leaves that begins with a v-shaped section of discoloration is a symptom of a Botrytis fungal infection, which eventually gives way to the development of fuzzy spores and total discoloration of leaves as the disease progresses.