烟豆（学名：Glycine tabacina）为豆科大豆属下的一个种。

Glycine tabacina, commonly known as variable glycine, is a scrambling plant in the bean family found in Australia. It grows in areas of high rainfall, ranging to semi-arid areas. The leaves are in threes, 7 cm long by 2 cm wide. Bluish to purple flowers form on racemes in the warmer months. The bean pod is up to 3 cm long. The habitat is among grasses, often in open country.