Yellow Rattle
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Rhinanthus minor
Common throughout Britain.
The leaves are sessile (they grow directly from the stem), somewhat heart-shaped at the base, otherwise ovate (oval-shaped) to lanceolate (shaped like a lance tip), dentate (toothed) and scabrid (a little rough to the touch).
The stem, which stands upright, can be simple or branched, is four-angled and often streaked or spotted black.
The yellow flowers are 13 to 15 millimetres (0.5 to 0.6 in) across and have a straight tube for the petals.
The silvery-coloured fruit is a dry capsule, which contains loose, rattling seeds when ripe that give the plant one of its common names.
Flowers from May-September.