Worldwide, the most valuable straw for plaits is grown in
Tuscany, and from it the well-known Tuscan plaits and Leghorn hats are made. The straw of Tuscany, specially grown for plaiting, is distinguished into three grades of quality. The highest quality is Pontederas Semone, the second highest is Mazzuolo. The bulk of the plaits are made from this grade of straw. The third grade, Santa Fioro, is only used to plait "Tuscan pedals" and braids. The wheat-seed for these straws is sown very thickly on comparatively elevated and
arid land, and it sends up long attenuated stalks. When the grain in the ear is about half developed the straw is pulled up by the roots, dried in the sun, and subsequently spread out for several successive days to be bleached under the influence of alternate sunlight and night-dews. The pipe of the upper joint alone is selected for plaiting, the remainder of the straw being used for other purposes. These pipes are made up in small bundles, bleached in
sulfur fumes in a closed chest; assorted into sizes, and so prepared for the plaiters. Straw-plaiting is a domestic industry among the women and young children of Tuscany and some parts of
Emilia. Tuscan plaits and hats vary enormously in quality and value; the plait of a hat of good quality may represent the work of four or five days, while hats of the highest quality may each occupy six to nine months in making. The finest work is excessively trying to the eyes of the plaiters, who can at most give to it two or three hours' labor daily. == China during the Tang dynasty (618–907) ==