Slender erect ± succulent annual herb 5-10 cm. tall, sparingly branched from base, branches pilose with lax transparent hairs and us. dense long jointed glandular hairs. Lvs sessile, rather distant, 4-12 × 3-10 mm., quadrate-ovate to suborbicular in outline with 2-4 pairs of subacute to acute teeth, cuneate at base, scabrid with stiff appressed hairs, especially on thickened revolute margins, and us. densely pilose with long jointed glandular and smaller non-glandular hairs. Fls few or several pairs towards the tips of the branches, sessile or on pedicels up to 4 mm. long. Calyx 5-8 mm. long (sts up to 10 × 6 mm. in fr.), pubescent as lvs, subevenly divided ?-1/2 way; lobes acute, margins and midribs thickened. Corolla bright yellow, 10-12 mm. long; tube ± = or > calyx; lobes of lower lip up to 3 mm. wide, shallowly emarginate. Anthers golden yellow, margins hairy, awns us. very unequal. Capsule > calyx, 5-8 × 4-5 mm., obovate to pyriform, glab.; seeds 6-8 per locule, 1·5-2 mm. long.
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