A number of varieties of parsley are grown for their tops, but only Hamburg parsley is grown for its good-size, fleshy, edible root. American seed catalogs seem to list only one variety, referring to it as either parsley root or Hamburg parsley, and they picture it as a long, whitish tapered root. Apparently, varieties with a round turnip-shaped taproot are known, but I have not found them in U.S. seed catalogs.
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