Rhinanthus minor; the yellow-rattle is a plant of the lowland pastures of Iceland but can also be found in upland heathlands. However, it is rare in most of the highlands. It is also frequently found on soils disturbed by human activities. The flowers are yellow, but note they often have a blue/purple spot on the tip of the upper lip of the corolla.
It is a member of the broomrape family (Orobranchaceae) but in the past it was considered to be a member of the figwort family (Scrophulariaceae). The Icelandic name of this species is Lokasjóður.