Italian Parsley (Petroselinum crispum var. neapolitanum)
Thomas Jefferson grew the plain-leaf or Italian Parsley as early as 1774 and listed it as Common Parsley in his vegetable garden calendar. This flat-leaf type is considered more flavorful than the curled form also planted by Jefferson. Parsley can be grown as an annual or biennial; if allowed to flower in its second year, parsley will attract butterflies and other beneficial insects.
For more information & the possible availability
Contact The Tho Jefferson Center for Historic Plants or The Shop at Monticello