Vascular Plants of North Carolina
Account for Lesser Swine-cress - Lepidium didymum   L.
Members of Brassicaceae:
Members of Lepidium with account distribution info or public map:
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Section 6 » Family Brassicaceae
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DistributionThroughout the Coastal Plain, scattered in the Piedmont and west to Polk County.

Native of South America; in N.A. southern Canada and the U.S., except absent from a broad middle area.
AbundanceFrequent to common in the Coastal Plain, rare to uncommon in the Piedmont, rare on the Outer Banks.
HabitatFields, cropfields, barnyards, edges of rivers, disturbed soils, railroad margins.
PhenologyFlowering and fruiting March-July.
IdentificationSwine-cress is distinguished by its 1-2 times pinnatisect leaves and its pods, which are composed of 2 kidney-shaped halves that have a rugose surface. Other Lepidium species have circular-shaped pods that are flattened on opposite sides (like a coin). In addition, this species has a sprawling or slightly ascending stem, as opposed to erect in others.
Taxonomic CommentsThis species is often named as Coronopus didymus in RAB (1968) and in many other references. The logic of including this species with Lepidium seems fuzzy.

Other Common Name(s)
State RankSE
Global RankGNR
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US Status
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Larry Chengeneral vicinity of Elizabeth City PasquotankPhoto_non_natural

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