Annual Toadflax is not closely related. It has much narrower leaves and distinctive blue and white flowers.
There are 108 records in the project database.
View at Maryland Plant Atlas
Search Flora of North America
Search Mid-Atlantic Herbaria Consortium
Search Norton-Brown Herbarium
View taxon at iNaturalist
View taxon at NatureServe
Search Google Images
Search MBP Facebook posts (beta | requires login)