White Mustard (Sinapis alba L.)
The seeds (1 to 2 mm diameter) of the Sinapis alba L. Although called "white mustard", the seeds are yellow to light brown. The dried seed do not have any fragrance, but exhibit a pungent taste after some time of chewing.

White mustard probably originates from the Mediterranean region, but various cultivars are grown in Northern, Central and Eastern Europe. Related species are Chinese Mustard, S. cernua
(syn. Brassica cernua), from China and rocket, Eruca sativa
(syn. Brassica eruca), from Southern and Eastern Europe.

Mustard (and similar words in Roman languages, and the German Mostrich for mustard paste) is derived from Latin (vinum) mustum, "must". Although mustard paste is today predominantly prepared
with vinegar and wine, the Romans (who made mustard seeds popular in Central and Western Europe) used must (young wine).