Why many different plant seedlings look like salad cress

The first time my husband met my research subject the legume Medicago truncatula he was presented with a row of seedlings growing on an agar plate (see photos below). His response to this was “Ahh, you work on cress!”  My husband is not a biologist or gardener so his mistake is understandable. Although M. truncatula…

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Why many different plant seedlings look like salad cress

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Curly cress has finely divided leaves resembling parsley or chervil atop thin, branching stems. Curly cress is dark green and is also called curled

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