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To: Ron Rosi From: Mason County Noxious Weed Control Board Subject: Identification of Aquatic Plants Plant Location Plant Name Plant Information Phillips Lake SW Loop Dulichium Dulichium arundinaceum This tall, perennial grass-like herb has stems that arise singly or in small patches from creeping rootstocks. The leaves are arranged in three vertical rows along the upper stem, giving the plant a symmetrical appearance. This plant is common in coastal areas. It occurs in wet meadows, bogs, and in the shallow water of stream and lake margins. Importance of plant: The achenes are eaten by waterfowl. Dulichium's rhizomatous growth may also help stabilize shorelines. Phillips Lake W and E Side Rush Juncus or Carex Rushes are grass-like plants frequently found in wet places including shorelines of lakes, ponds, and streams. Rushes usually have round green stems, with clusters of brown, papery flowers appearing to come from the top or side of the stem Importance of plant: Nesting material, food, and shelter for many insects, birds, and mammals. Phillips Lake South End Lot 15 Water-Purslane Ludwigia palustris These perennial herbs can be found creeping on the shoreline, floating on the water surface, or growing upright. Water purslane is smaller and has inconspicuous flowers and opposite leaves. Although these two species are closely related, they do not resemble each other in appearance. Importance of plant: Provides food for muskrats and waterfowl. Water purslane is used in water gardens and has medicinal uses. Phillips Lake NW Loop 2450 Sedge Carex Sedges are grass-like, fibrousrooted plants often found growing in marshy areas. A common phrase, "sedges have edges," helps identify these plants, and refers to the fact that most members of this genus have three-sided stems that are triangular in cross-section. More than 130 sedge species occur in Washington. Most inhabit wet areas. Importance of plant: Used by Native Americans for weaving baskets and mats. Seeds used by many birds, and browsed by deer, elk, and moose. Stabilizes shorelines Phillips Lake E Side Rosi’s Beach Phillips Lake South End 15 Muskwort Chara Although these common lake inhabitants look similar to many underwater plants, they are actually algae. Muskgrasses are green or gray-green colored algae. The main "stem" of muskgrasses bear whorls of branchlets, clustered at regularly spaced joints. These algae are identifiable by their strong skunk-like or garlic odor, especially evident when crushed. Importance of plant: An important food source for waterfowl, particularly ducks. Provides valuable protection for young fish and invertebrates. Muskgrasses grow quickly and occasionally cover the entire bottom of ponds, however its low growth rarely causes it to be considered a nuisance in Washington. Phillips Lake N Loop 2606 Common Elodea Elodea canadensis These underwater perennial plants sometimes occur as tangled masses in lakes, ponds, and ditches. Individual plants within each species vary in appearance depending on growing conditions. Importance of plant: Food and habitat for fish, waterfowl, other wildlife. Used in cool water aquariums. Phillips Lake NE Loop 2606 Big-Leaf Pondweed Potamageton amplifolus Big-leaf pondweed has two leaf types: large, usually wavy-edged underwater leaves which are curved into a banana shape, and oval, leathery floating leaves that grow on or near the water surface. The underwater leaves often decay late in the growing season. Importance of plant: Seeds and entire plant is good wildlife food and habitat. Phillips Lake South End Lot 15 Rush Juncus or Carex Rushes are grass-like plants frequently found in wet places including shorelines of lakes, ponds, and streams. Rushes usually have round green stems, with clusters of brown, papery flowers appearing to come from the top or side of the stem Importance of plant: Nesting material, food, and shelter for many insects, birds, and mammals. Phillips Lake NW Loop 2450 Unknown Not enough plant material for proper ID.