This paper presents five newly recorded species of Flemingia present in two subgenera; Flemingiastrum and Rhynchosioides. Four
species are new for Thailand: F. nana, F. semialata, F. vestita and F. wallichii. One species, F. nana, is new for Myanmar, and one
species, F. wightiana, is new for Laos. Two taxa, F. brevipes and F. latifolia var. siamensis, are synonymised under F. macrophylla.
Detailed morphological descriptions and colour photographs are provided. A key to the species in Flemingia subgenus Flemingiastrum
for Thailand is provided.