Botany Taxonomy Rollins describes Lesquerella fendleri as a perennial, with densely pubescent, silvery leaves. A distinguishing character from other Lesquerella species is that its leaf trichomes are fused for half or more of their length but never fully fused. Basal leaves are between 1 to 4 cm long and 1 to 6 mm wide, with elliptic blades. The cauline leaves are oblanceolate or spatulate and range between 0.5 and 2.5 cm long and 1 to 5 mm wide. Leaf margins are generally entire or remotely dentate, narrowing gradually to a slender petiole.
Yellow flowers occur on inflorescences that usually extend beyond the leaves.
The floral buds are ellipsoid shaped. Seeds are contained in pods, referred to as siliques, that have a globose shape. Each capsule normally contains between 6 and 20 seeds. No pubescence occurs on the interior or exterior of this capsule. Seeds are flattened, 1.3 to 2.0 mm long and yellow to orange brown in color.