A plant of the species Cichorium intybus.
Cornflower blue.
A small annual plant in the family Asteraceae, Centaurea cyanus, usually with bushy blue flowers which grows natively in European cornfields (i.e. wheatfields).
Of a blue colour, as that of the cornflower; cornflower blue.
Equisetum, a fern ally
especially, common mare's tail (Hippuris vulgaris)
Erigeron canadensis (syn. Conyza canadensis), an annual weed
A long streaky cloud, spreading out like a horse's tail, and believed to indicate rain; a cirrus cloud.
Any aquatic plant of the genus Hippuris, having narrow leaves in whorls.