A new species Commelina badamica Nandikar & Gurav from the sandstone plateaus of Badami, Karnataka, India is described and illustrated. Commelina badamica is similar to C. clavata and C. diffusa, but differs in having indefinite habit, linear to narrowly lanceolate leaves, puberulous or velutinous to tomentose spathes, clawless petals, a velutinous ovary, a radiately tri-lobed stigma, one capsule per spathe, and trapezoidal, ventrally truncate seeds.