Tall with a single flower per plant, these wildflowers are introduced in North America where they grow on crops. Common Sunflower Common SunflowerĬommon Sunflowers (Helianthus annuus) are some of the largest yellow wildflowers in the world. Partridge Pea is an important food source for deer, but especially for caterpillars of butterflies as well as for bees.Ĭlusters of small yellow flowers attract these species to one of the most common host plants for North American caterpillars. These wildflowers may also be referred to as Sensitive Pea gave they lose their leaves when touched. Partridge Peas (Chamaecrista fasciculata) have bright yellow colors. These plants have been introduced to control soil erosion, especially in areas where this can have a major impact, such as along roads.īird’s-foot Trefoil spreads quickly and smothers local plants creating large colonies along roads. These wildflowers may also come with orange flowers.īird’s-foot Trefoil is among the wildflowers introduced to North America that have turned out invasive. Most blooming Bird’s-foot Trefoils (Lotus corniculatus) have yellow flowers. These colonies may be hundreds of years old. These wildflowers grow in colonies from Georgia to the Northern parts of Canada. Both have yellow flowers, on the other hand. Small differences exist between the 2 Yellow Trout Lily subspecies of North America. Comprised of 6 large petals, this flower grows to an average diameter between 20 and 30mm. The flower of the Yellow Trout Lily (Erythronium americanum) is completely yellow. Its toxic profile has put the Lesser Celandine among the noxious weeds of many US regions. These wildflowers are toxic to horses and cattle. Lesser Celandine is an introduced species in North America where it shows an invasive growth pattern.Īpart from invading its new territories, Lesser Celandine is wildflowers that are toxic to animals. These flowers appear in early spring and can be visible through the summer. Lesser Celandine Lesser Celandineĭistinct yellow petals are arranged around a yellow central section on the Lesser Celandine flowers (Ficaria verna). It is also a cultivated species despite being toxic to small animals. Growing to a height of up to 18 inches, Black-eyed Susan is an old species known to Native Americans. Large yellow flowers with brown central areas are specific to The Black-eyed Susan (Rudbeckia hirta).įound in 4 varieties, this North American plant is specifically known for its popularity across Maryland and Mississippi. The Mexican Gold Poppy, one of the subspecies of the plant with vivid yellow coloring is found in areas of The Sonoran Desert. The flowering period of the species varies from spring to summer, according to its region.Īs a perennial plant, California Poppy is a species found in California and Mexico, with an invasive status outside of its endemic range.

California Poppy California PoppyĪ yellow California Poppy (Eschscholzia californica) is a common sight, along with its orange and red variants. Great Mullein has high multiplication rates with up to 700 seeds produced per flower capsule. The invasive status of Great Mullein is seen by overcrowding growing habits that inhibit the growth of other plants. It invades disturbed lands as well as crops. This species of plant is known for its invasive status. It represents one of the common invasive species across different fields, especially on disturbed land. Great Mullein (Verbascum thapsus) is a species that blooms small yellow flowers. More than 100 seeds can be made by a single flower head.

Its rapid spread is also attributed to a high seed production rate. Common DandelionĬommon Dandelion has a widespread distribution across Europe and North America. Its flower heads are shaped similarly to balls and are seen around different fields in the summer.

Widespread distribution and uniform yellow flowers make The Common Dandelion (Taraxacum officinale) one of the most common yellow wildflowers.

Bermuda buttercup poisonous