Herbs, annual, cespitose, to 80 cm. Leaves dimorphic, glaucous; basal leaves tapered into long petiole, linear-spatulate; distal cauline leaves sessile, broadly to narrowly lanceolate, 6–20 cm, base commonly cordate-clasping, apex acute to acuminate. Inflorescences terminal, cymes solitary; bracteoles 3–5 mm. Flowers 2–2.5 cm wide; sepals boat-shaped, 9–12 mm, glabrous; proximal petal white, rhombic, 3–4 mm; distal petals blue to lavender, obovate, 15–18 mm; proximal lateral stamens with purple hairs; distal stamens bearded with yellow-tipped hairs; ovules 2 per locule. Capsules oblong, 6–8 mm. Seeds gray-brown. 2n = 26.
Phenology: Flowering spring–early summer.
Habitat: Limestone talus slopes, granitic slopes, edges of woods and ravines, prefers some shade
Tex., Mexico (Durango).
Only one record of Tinantia anomala is known from Durango.