This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
Buckshorn Plantain(Plantago Coronopus, L.). - The habitat of this plant is all the maritime coasts, dry and gravelly commons inland, gravelly barren spots near the sea, and it becomes more maritime northwards. The plant has the rosette habit. The plant is downy, with long hairs, but varies much in this respect and in size. The leaves are linear, deeply divided nearly to the base, or toothed, 1-ribbed, and may be entire. The scape is round, hairy, ascending, equalling or exceeding the leaves. The spikes are slender, many-flowered, short or long, cylindrical. The bracts are awl-like, erect, the base egg-shaped, exceeding the sepals, which are blunt. The lateral sepals have a membranous wing fringed with hairs. The corolla-tube is downy or hairless. The stamens are pale-yellow. The seeds are pale-brown, with white extensions at each end, and mucilaginous, adhering to the soil when they fall. The plant is 1-8 in. high, flowering between June and August, and is a herbaceous annual.