Linaria vulgaris
Butter and eggs or Common Yellow Toadflax

Linaria vulgaris
Linaria vulgaris
Wiki Commons, GNU
Britton & Brown
Botanical name: Linaria vulgaris
Common name: Butter and eggs or Common Yellow Toadflax
Group: dicot
Family: Scrophulariaceae
Growth type: forb/herb
Duration: perennial
Origin: introduced
Plant height: 1 - 3'
Foliage: Leaves are alternate and entire. Leaves are sessile (do not have a stalk).
Flower: 1", yellow with an orange spot
Flowering time: June - August
Habitat:  roadsides, waste places, fields
Range in New Jersey: statewide
Heritage ranking, if any: n/a
Misc. An introduced plant.; considered a noxious weed in 43 states, though not in NJ. (USDA). Grows by means of rhizomes as well as winged seeds and is difficult to eradicate.