Acacia farnesiana, commonly known as Sweet Acacia, Needle Bush, or Cassie Flower, is a small tree or shrub widely recognized for its fragrant flowers and versatile uses. Native to the tropical and subtropical regions of the Americas, it has been introduced to various parts of the world, including Asia, Africa, and Australia, where it thrives in dry, arid conditions.

Acacia farnesiana typically grows to a height of 3–7 meters, with a bushy and spiny appearance. It has multiple stems and an open, spreading crown. The branches are armed with long, sharp thorns, which help protect the plant from herbivores.

Acacia farnesiana is a versatile and valuable tree with applications in the fragrance industry, traditional medicine, and sustainable land management. Its fragrant flowers are prized for producing essential oils, while its resilience in harsh climates makes it an excellent choice for ornamental and ecological purposes. With its ability to fix nitrogen, control erosion, and support biodiversity, Acacia farnesiana plays a crucial role in both economic and environmental landscapes.