Chaenorrhinum minus is an annual herb to 30 cm tall, glandular-hairy.
Leaves alternate, linear, to 2 cm long, tip blunt, stalk very short.
Flowers blue-purple with yellow mark, irregular, to 0.6 cm long, axillary.
Fruit a dry capsule.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Open areas, railway rights-of-way.