White Portugal, of New England.
Bulb of medium size, flattened,—average specimens measuring about three inches in diameter, and an inch and a half or two inches in thickness; neck very small; skin silvery-white. After the removal of the outer envelope, the upper part of the bulb is often veined and clouded with green, while the portion produced below ground is generally clear white. Flesh white, fine-grained, sugary, and remarkably mild flavored.
It forms its bulb early and regularly, ripens off well, and is quite productive; an average yield being about four hundred bushels per acre. It is a very poor keeper; and this is its most serious objection. It is always preserved through the winter with much difficulty, and almost invariably decays if kept from light and exposed to dampness. The best method for its preservation is to spread the roots in a dry, light, and airy situation.
The Silver-skin Onion is much esteemed in the middle and southern sections of the United States, and is cultivated to a considerable extent in New England. It is well adapted for sowing in August, or the beginning of September, for early use, and for marketing during the ensuing spring. Where the winter are mild, the crop, with slight protection, will sustain no injury in the open ground. In Europe it is much esteemed, and extensively grown for pickling, as its "white color, in contrast with the fine green veins, or lines, gives it a very agreeable appearance. For pickling, the seed should be sown very thickly, then slightly covered with fine soil, and afterwards rolled. If the seed is covered more deeply, the bulb, from not being quite on the surface, has a larger and thicker neck; so that it loses its finely rounded form, and is, moreover, less compact."
This variety, erroneously known in New England as the "White Portugal," is unquestionably the true Silver-skin, as described both by English and French authors. The application of the term "Silver-skin" to the common Yellow Onion, as very extensively practised by seedsmen and market-men in the Eastern States, is neither pertinent nor authorized.
Strasburg. M'Int.
Yellow Strasburg. Flanders. Dutch. Essex.
This is the variety most generally cultivated in Great Britain. Its form varies from flat to globular, or oval; bulb large, three inches wide, and full two inches in depth; outside coating brown, of firm texture. Divested of this, the color is reddish-brown, tinged with green. Flavor comparatively mild. It is a very hardy sort, succeeds in cold localities, and keeps well.
The Strasburg and Deptford Onions much resemble the common Yellow Onion of New England; and the difference between the sorts is not great, when English-grown bulbs of the first-named varieties are compared with the bulbs of the Yellow Onion, American-grown: but seeds of the Strasburg or Deptford, raised in England and sown in this country, almost invariably fail to produce plants that form bulbs so generally or so perfectly as American-grown seeds of the Yellow Onion.
Top or Tree Onion.