The corolla is blue-purple, 4.5-6 mm long, with a short tube nearly equaling the calyx, and a limb diameter of 4-6 mm. The lobes are nearly square or slightly inverted-ovate to elliptic, 2-lobed at the apex.
It grows in moist rock crevices and moss at elevations of 4000-5000 meters in southern Tibet (Yadong, Cona, Dawang), and is found in Sikkim and Bhutan.
It flowers in July.
The calyx is cup-shaped, 3-3.5 mm long, glandular on the outside, often purplish-black. It is split to the middle or slightly beyond, with rectangular to lanceolate or narrowly elliptic lobes, acute or obtuse at the apex, sometimes with small teeth.