Annual, 8-68 cm tall; stems erect, sparsely branched, setose and with stipitate glandular hairs; leaves pinnate, 3-8.5 cm long, 1-4.5 cm wide, strigose, stipitate-glandular, petioles to 1.5 cm long, margins irregularly incised; inflorescence terminal on the main stem and lateral branches, more stipitate-glandular than leaves, individual inflorescence branches with 1-3 cymes to 10 cm long in fruit; flowers with pedicels to 0.5 mm long, congested; sepals linear to narrowly oblanceolate, averaging 2.7 mm in flower and 4.5 mm in fruit, setose and heavily stipitate glandular; corolla blue, campanulate, 4 mm long, 3-3.5 mm wide, lobes pubescent and erose; stamens exserted 1 mm; mature seeds 4, oblong, brown, 3.2-3.3 mm long, 1.1-1.5 mm wide, alveolate, ventral surfaces excavated on both sides of ridge. Flowers late July to middle October.