Leaves of hesperochiron pumilus
form a basal rosette, growing close to the ground; plants typically produce between two and ten. The leaves have unlobed, ciliate edges but are otherwise hairless, and a narrow base, tapering to the petiole. There are no stems; flowers (between one and eight per plant) are held atop short, leafless stalks, angled upwards or at an angle.
Flowers have a five-lobed calyx, the lobes somewhat different in size, and usually lightly hair-covered. The five, rounded petals are generally white, but often tinged purple or light blue, and crossed by darker purple veins. The flower center is yellow; from here rise five stamens, with yellow-white filaments and bluish anthers, and a hairy style topped by two stigmas. The stamens are also different in length, though all are quite short, included within the corolla. Flowers are around one inch in diameter.