The landscape in Spokane County, Washington, is dotted with many various yellow flowers. Many native wildflowers as well as weed flowers call Spokane County home. There is a large variety of toxic flowers in the Spokane County area, as well. It’s very important to be able to identify some of these flowers in order to protect children and animals. For safety reasons never pick or attempt to eat any flower that is unidentified.
Yellow Floating Heart
Yellow floating heart (Nymphoides peltata) flowers are native to tropical Asia and Europe; they are also found in hot climates across the United States in ponds, slow moving rivers and lakes. They are an aquatic perennial with long branches that float beneath the surface of the water. The undersides of the leaves are purple in color with a heart shape and grow to a length of 1 to 4 inches. The five-petal flower is bright yellow and about 1 to 1 1/2 inches in diameter. These flowers grow during April through October.
Yellow Star Thistle
The yellow star thistle (Centaurea solstitialis L.) is native to Eurasia, yet it is found all through the United States. It is an annual greenish-gray invasive bushy weed that can grow to be about 6 1/2 feet long. Its flowers are bright yellow circles with long sharp spines. The yellow star thistle is known to crowd other plants and is toxic to horses.
The tansy ragwort (Senecio jacobaea) is a biannual plant that can also be a short-seasoned perennial weed flower. These plants can grow between 1 to 6 feet in height and branch out with single or multiple stems. The tansy ragwort’s flower is a medium yellow in color and resembles miniature sunflowers. The flower emits a strong weedlike odor. This plant is highly toxic to all animals and livestock. If an animal consumes this plant as part of its daily diet it will die within a month.
The buffalobur (Solanum rostratum Dunal) is a native nuisance weed to the Midwest area of the United States. This weed has repeatedly tried to cultivate in eastern and central Washington state but never seems to last long. This plant may be found in fields, pastures, yards and waste areas. It has bushy stems that reach up to 2 feet in height and 2- to 6-inch-long leaves. The buffalobur flower is wheel shaped with five petals and is 1 to 1 1/2 inches in diameter.
Yellow Flag Iris
The yellow flag iris (Iris pseudacorus) is a native plant to Europe, North Africa and the Mediterranean. This flower appears all across the United States except in the Rocky Mountains. This iris usually grows in wetlands or along slow moving rivers and lakes. The yellow flag iris has broad flat pointed overlapping green leaves that are 1 inch wide. The plant grows to be 4 to 6 feet in height and resembles a cattail when not in bloom. Its beautiful blooms appear June through August. The flower is a bright golden yellow in color and 3 to 4 inches across, with three brown or purple streaked sepals that curve backward.