Glycosyltransferase involved in the xylosylation of xylan, the major hemicellulose (non-cellulosic component) of primary and secondary walls of angiosperms (PubMed:29325159). Possesses beta-1,2-xylosyltransferase activity, transferring xylose from UDP-xylose to the xylan backbone (PubMed:29325159). Catalyzes the addition of 2-O-xylosyl side chains to the xylan backbone (PubMed:29325159). Glycan metabolism. Widely expressed. Belongs to the glycosyltransferase 61 family.