Wildflowers, Plants and Ferns, Pacific Northwest
Pacific Water Parsley grows all over the BC coast and is a perennial plant that grows to a height of 1 m, branching occasionally. The light green stems are hairless, ribbed and they are more or less erect, but occasionally sprawl.
The compound leaf is triangular, broader at the base than at its tip, its size up to 30 cm long and 20 cm across. Each leaflet is about 2.5 cm long and 1 cm across. The foliage of Pacific Water Parsley is hairless.
Occasionally, some of the upper stems will bolt and produce groups of small white flowers that are flat headed at the top. Each group is about 7.5 cm across when fully developed, and consists of up to 12 small white flowers that are individually about 0.5 cm across. Each flower has 5 notched white petals, 5 white stamens, and a central pistil. The blooming period is from mid summer to early fall, and lasts about 6 weeks. The compound group of flowers are produced sparingly during this time period. Each flower is replaced by a single elongated seed.
The root system consists of fibrous roots and slender white runners that lie slightly below the ground surface. This plant will often form colonies.