Weed Types & PondWeed Pictures

Cellular, lower weed form. No distinguishable stem or leaf. Scum and Chara are common.

Finely divided leaves scattered along the stem with numerous bladder like structures on leaves. Stems have many branches and are densely leafy at the tips. Flowers are yellow and rise above surface.

Leaves may or may not be present. If present, they appear as a continuation of the stem. Stems are tall and smooth and either round or triangular in shape. A loose cluster of brownish flowers and seeds is located near the tip of the stem

Leaves are tall and flat. Stems are tall, round and unbranched. Flower is the distinctive cigar-shaped cattail which is green in early summer and turns brown and fuzzy in fall. This weed has an extensive root system. Difficult to control when well established

Leaves wide and wavy with smooth edges. Broad base clasps the stem. Upper stem commonly branched and leafy. Leaves are alternately arranged on stem. Solid tightly packed spike of nutlets at tip of weed rises above water surface.

Leaves whorled around the stem and have a serrated appearance. Spacing between leaf whorls is variable. Consequently, weeds may be long and sparse or bushy. Near the end of the stem leaves and whorls are crowded. Branches are forked repeatedly. Do not confuse with Chara.

Leaves thin with wavy and finely serrated edges. Stems branched. Upper leaves are often crispy and appear waxy. Leaves alternately on stem. Flowers born on spikes rise above the water surface.

Leaves the size of a pencil eraser. May be observed individually or in clusters upon close observation. Small root hairs may be seen hanging down from the underside of the leaf. No stem is distinguishable. Heavy growth will blanket the surface with many inches of growth. Duckweed is not interconnected as is Filamentous Algae. Do not confuse with Algae.

Leaves both floating and submersed. Submersed leaves are long and narrow. Floating leaves are oblong and slightly heart-shaped at base. Parallel leaf veins are evident. Stems occasionally branched. Leaves are alternately arranged on stem. Solid tightly packed spike of utlets at tip of weed rises above water surface.

Stem is long and branched with oppositely arranged leaves at the bottom and whorles of 3 leaves on the upper portion of the plant. Leaf is oval-shaped with margins toothed. There are pointed spines on the mid-rib of the underside of the leaf.

Leaves both floating and submersed. Submersed leaves are large, oblong, wavy, and taper to the stem. Floating leaves are oval-shaped. Parallel leaf veins are evident. Stems are seldom branched. Leaves alternately arranged on stem. Solid, tightly packed spike of utlets at tip of weed rises above water surface.

Plants of N. guadalupensis are rooted, submersed, and from 0.1 to 1.0 m long. The leaves are usually opposite or subopposite, from 0.2 to 2.0 mm wide, and 0.3 to 3.3 cm long. The teeth along the leaf margin are small, 18 to 100 per side, and barely visible to the naked eye. Sheaths at the base of the leaf are rounded to slightly auriculate. The flowers are small, inconspicuous and borne in the leaf axils on the same plant.

Leaves slightly heart-shaped at base coming to a point at leaf tip. Leaves small and more numerous near tip. Stems rigid, four-sided and have fine hairs on them. Leaves oppositely arranged on stem usually in pairs. Flowers bright purplish on a spike closely attached to stem.

Leaves are long and flat with parallel veins. Stems are tall and round with alternately arranged leaves. Flower of weed is made up of pikelets with long silky hairs such that this portion of the weed may appear as a silky mass. Stout rootstocks make this weed difficult to pull out.

Leaves are oblong and smooth on the edges. Stems are distinctly jointed with leaves alternately arranged. The lower portion of the stem is rooted at the joints. Flowers are small and tightly clustered and are white or pink in color. Weed may be mersed in shallow water or completely submersed with only flowers visible above surface in deep water.

Leaves large, round and slit to the center. Underside of leaf is often purplish. Stem is below the surface. Roots are thick and fleshy, most often buried in mud. Flowers are white with multiple rows of petals born on a single stalk at or above the surface. May be confused with Spatterdock.

Watermeal is a very tiny (less than 1 millimeter) light green free-floating, rootless plant Watermeal tend to grow in dense colonies in quiet water, undisturbed by wave action. Watermeal can be an aggressive invader of ponds and are often found mixed in with duckweeds or mosquito fern. If colonies cover the surface of the water, then oxygen depletions and fish kills can occur. These plants should be controlled before they cover the entire surface of the pond.

Leaves whorled in groups of four. Each leaf is divided into many thread-like leaflets extending from a central rib. Forms tangled mats at the surface. Seed heads develop in mid to late season and may extend above the water surface. Treat when weeds are actively growing before flowering occurs

Leaves are lance shaped with smooth edges. Veins in leaves are evident. Stems and leaves are hairy. Leaves are numerous and alternately attached. Flowers are bright yellow and develop at the top of the weed.

Leaves are oval in shape with smooth edges. Stem is attached to the middle of the leaf. A clear jelly-like coating covers the underside of the leaves and stems on mature weeds. A dull purple flower develops in early summer. Treat before jelly-like coating develops.