Rubus lambertianus is a flowering plant species in the genus Rubus found in Southern China (including Hainan), Taiwan, Japan, and Thailand. Its ploidy is 2n = 4X (tetraploid). The ellagitannins lambertianin A, B, C and D can be found in R. lambertianus.
Rubus lambertianus is a lianoid, semi-deciduous shrub that can grow 3 m (9.8 ft) tall. Flowers are white and 7–9 mm (0.28–0.35 in) in diameter. Mature berries are red and 6–8 mm (0.24–0.31 in) in diameter. In China, it occurs on slopes, roadsides, ...