This section is from the book "The Gardener's Monthly And Horticulturist V26", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
In an article on the Oxalidae in "Chambers' Encyclopedia,"I find the following: "O. Deppei is a Mexican species, with a root somewhat like a small parsnip - quite free from acidity. It is much cultivated in its native country, and succeeds well in the southern parts of England".
If this is a correct description of O. Deppei, then the plant catalogued and sold under that name by Vide, of Rochester, must belong to an altogether different species. The Oxalis Deppei of Vick has a fibrous-coated, dark brown, bulbous root, not parsnip-like, but pear-shaped.
Last spring a dozen of these bulbs were purchased of the Rochester seedsman and planted; here, two of them sending up leaves and flowers, the balance failing, probably by reason of too frequent and excessive applications of water that was decidedly cool.
A week ago, noticing leaves arising from the new bulbs, the earth in which they lie buried was turned over, and the increase from the two of last year was found to be over three hundred. At that rate, starting with one bulb only, the entire population of Europe, of all ages and both sexes, could, in four years, be furnished with two each, and in five years the product would be sufficient to give to each man, woman and child upon the globe about forty bulbs with which to start an Oxalis garden. Allowing one plant to stand upon each four square feet of ground, the value of an acre of Oxalis Deppei bulbs - if it were possible to sell an acre's product in one year or ten - would fill a purse with the comfortable little sum of twelve thousand five hundred dollars. Santa Cruz, Cal.