Leaves are compound, alternate, and divided into many finely dissected or small narrow leaflets that are thread-like. Leaves and seed heads are on long stalks.
Stem is erect, branched, slender, 6 to 18 inches tall, being taller than wider, and glabrous.
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Flowers are tiny bright white born in compound umbels encircled at the base by threadlike bracts. Fruit is two pitted and ribbed.
Root is a deep taproot.
Propagation is by seed.