Millefleur, millefleurs or mille-fleur (French mille-fleurs, literally "thousand flowers") refers to a background style of many different small flowers and plants, usually shown on a green ground, as though growing in grass. It is essentially restricted to European tapestry during the late Middle Ages and Early Renaissance, from about 1400 to 1550, but mainly about 1480-1520. The style had a notable revival by Morris & Co in 19th century England, being used on original tapestry designs, as well as illustrations from his Kelmscott Press publications. The millefleur style differs from many other styles of floral decoration, such as the arabesque, in that many different sorts of individual plants are shown, and there is no regular pattern. The plants fill the field without connecting or significantly overlapping. In that it also differs from the plant and floral decoration of Gothic page borders in illuminated manuscripts.
There is also a rather different style known as millefleur in Indian carpets from about 1650 to 1800.
In the millefleur style the plants are dispersed across the field on a green background representing grass, to give the impression of a flowery meadow, and cover evenly the whole decorated field. At the time they were called verdures in French. They are mostly flowering plants shown as a whole, and in flower. Many are recognizable as specific species, with varying degrees of realism, but accuracy does not seem to be the point of the depiction. There are very often animals and sometimes human figures dispersed around the field, often rather small in relation to the plants, and at a similar size to each other, whatever their relative sizes in reality.
The tapestries usually include large figures whose meaning is not always apparent, which seems to derive from the division of labour under the guild system, so that the weavers were obliged to repeat figure designs by members of the painters' guild, but could design the backgrounds themselves. Such was the case in Brussels at any rate, after a lawsuit between the two groups in 1476. The subjects are generally secular, but there are some religious survivals.