English: White flower of Saskatchewan These two plants are confused with each other... Water parsnip, swamp parsnip, sium suave OR Cicuta maculata Water Hemlock, Poison Hemlock. WHEN in doubt classify as water hemlock. Water parsnip and water hemlock both have cluster of small white flowers shaped like umbrellas, and both have the same habitat near the shore line of lakes, and rivers. Water parsnip has leaves only once compound, and water hemlock has leaves which are three times compound. Water hemlock has a large swelling at the stem base. Water hemlock is highly poisonous. Water parsnip is not poisonous. This particular flower image has no swelling at stem base. From Traditional Plant Foods of Canadian Indigenous Peoples By Harriet V Kuhnlein, Nancy J. Cicuta maculata The water hemlock has bracts at the base of each small flower cluster, not at the base of the main flower head Wester Water Hemlock The Water parsnip has small bracts at the base of flowers and main flower head as well Water parsnip This flower does have bracts at the base of the main flower. The Yarrow Achillea millefolium has feathery leaves. Went back to look at this plant, and added bold text. New images to also follow.