Watercress,Nasturtium officinale,Mustard Family (Brassicaceae)

Found in water, wet soil, springs
Seen blooming in July in Agua Caliente Spring, Abiquiu
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Watercress grows with trailing, fleshy, hollow stems which float on the surface of the water or sprawl across mud. Tiny white flowers with four petals grow in clusters at the tips of stems floating above the water. It is a widespread and problematic invader of clear streams, springs and brooks, it can rapidly spread out on the surface of the water choking out natives and is listed as noxious and invasive by 46 states. Watercress is very rich in vitamins and minerals, and has long been valued as a food and medicinal plant. The stems and leaves are crisp and can be used as a salad with a pungent radish flavor. Leaves can be harvested year-round. Care should be taken if harvesting it wild; aquatic insects and spiders must be cleaned off and there is a risk of beaver-fever (giardia) or ingesting the toxins from polluted waters. It is considered a cleansing herb; its high content of vitamin C makes it a remedy that is particularly valuable for chronic illnesses. Applied externally, it has a long-standing reputation as an effective hair tonic, helping to promote the growth of thick hair. Source.
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