Cardamine nuttallii (Nuttall's toothwart) is also known as beautiful bittercress because of those showy blooms. The leaves at the base (not shown) are entire and look pretty similar to
Cardamine angulata (angeled bittercress).
Cauline leaves (shown below) have 3-5 entire leaflets and occur midway up the stem. This species is common throughout western Washington in moist forests. Family is
Brassicaceae (Mustard) - flowers have four petals and four sepals, four tall stamens and two short stamens; seed pods (called silicles or siliques) split open from both sides to expose a clear membrane in the middle; superior, bicarpellate ovaries (Elpel).
cauline = of, on or pertaining to the stem, as leaves arising from the stem above ground level.
silicle = a dry, dehiscent fruit of the
Brassicaceae family, typically less than twice as long as wide, with two valves separating from the persistent placentae and septum.
silique = a dry, dehiscent fruit of the
Brassicaceae family, typically more than twice as long as wide, with two valves separating from the persistent placentae adn septum.
bicarpellate = with two carpels.
placenta (plural placentae) = the portion of the ovary bearing ovules.
septum (plural septa) = a partition, as the partitions separating the locules of an ovary.
locule = chamber of cavity of an organ, as in teh cell of an ovary containing the seed or the pollen bearing compartment of an anther. (All definitions Harris and Harris)