"The Leek is a hardy biennial, and produces an oblong, tunicated bulb; from the base of which, rootlets are put forth in great numbers."
"It is quite distinct from the Common Onion, as it forms no bulbs, but produces numerous elongated, angular, tunicated stems, not unlike scallions, or some of the smaller descriptions of leeks."
"You must observe that there are three kinds of plants which are said to have bulbous roots: those which are solid, and which should be properly called corms, such as the crocus, the corn-flag, and many of the half-hardy plants with similar half-tubular flowers; the tunicated bulbs, which may be peeled off in scales, such as the onion, the hyacinth, and the tulip; and the scaly bulbs such as the lily."