Aureolaria flava

Aureolaria flava, commonly called smooth yellow false foxglove or Gérardie jaune,[1][2] is a species of plant in the broomrape family that is native to the eastern United States and some parts of southern Canada.

[5] Aureolaria plants are hemiparasitic, which is a character that in part describes its residing family Orobanchaceae.

Commonly 6–15 cm long, leaf apex acute, opposite or decussate, and margins entire.

Bell shaped calyces between 9–16 mm long, 5 lobed, glabrous, linear, with entire margins.

Bell shaped corollas 35–60 mm long, glabrous externally, pubescent at the internal base and lobe margins.

Anthers up to 7mm long spurred at the base surround with dark green nectary ring.

[8] Aureolaria flava has small fruit capsules 12–20 mm long which are often glabrous and ovoid.

[8] Aureolaria flava is often mistaken for other members of its genus however the glabrous stem is very distinct to providing easy differentiation.

[1] This concerning status of Aureolaria flava within several states is due to a reliance on semi-open oak ecosytems.

Oak ecosystems are under threat for a variety of reasons within eastern North America which directly puts Aureolaria flava at risk.

This species also plays a crucial role as a larval host plant for Euphydryas phaeton.