Photographer: Steve C. Garske
Nasturtium microphyllum Boenn. ex Rchb.
one-row yellow-cress, watercress
Nasturtium: Latin nasus for “nose” and tortum for “to twist”, referring to the pungent taste
microphyllum: micro for "small;" phyllon for "leaf"
|Status: ||Introduced - adventive|
|Plant: ||erect or spreading, perennial, 4"-18" tall, emergent aquatic, sometimes evergreen, forming large, tangled masses; stems spreading; rooting from the lower nodes|
|Flower: ||white, 4-parted, 1/5" wide, petals 2 times longer than the sepals; inflorescence a cluster (raceme) of stalked flowers from the ends of the shoots|
|Fruit:||pod, long, thin; coarse seeds in 1 rows|
|Leaf:||pinnately-divided into 3-9 rounded leaflets with the end one longest|
|Habitat: ||sun; wet; streams, springs, cold water; in limy, sediment, gravelly soil|