Coreopsis bigelovii

Coreopsis bigelovii, commonly known as Bigelow's tickseed, is a species of flowering plant in the Asteraceae family, which is native to the southwestern United States and northern Mexico. This annual herb is particularly noted for its vibrant yellow flowers, which bloom in the spring and early summer, attracting a variety of pollinators including bees and butterflies. The plant is named after John Milton Bigelow, a 19th-century American botanist who was part of the United States and Mexican Boundary Survey, which explored the flora and fauna of the region.

Description

Coreopsis bigelovii is an annual plant that typically grows to a height of 10 to 50 cm. Its stems are slender and erect, branching lightly. The leaves are mostly basal, pinnately divided into narrow segments, giving them a delicate appearance. The flower heads are solitary on long peduncles, with ray florets that are bright yellow and disk florets that are darker, often with a reddish-brown hue. The fruit is a small achene, which aids in the dispersal of seeds by wind.

Habitat and Distribution

This species is found in desert regions, often in sandy or gravelly soils, and is adapted to arid environments with low rainfall. It is native to the southwestern United States, including California, Arizona, and Nevada, as well as northern Mexico. Within these regions, it occupies habitats such as desert valleys, slopes, and mesas.

Ecology

As a desert-adapted plant, Coreopsis bigelovii has several adaptations for survival in harsh conditions, including a deep root system for accessing water from below the surface and narrow leaves to reduce water loss. Its bright yellow flowers are not only visually striking but also play a crucial role in the ecosystem by providing a source of nectar for pollinators. The plant's flowering period coincides with the spring emergence of many bee and butterfly species, making it an important component of the desert floral community.

Conservation

While Coreopsis bigelovii is not currently listed as endangered, its habitat is threatened by human activities such as urban development, agriculture, and mining. Conservation efforts are focused on habitat preservation and the protection of wild populations to ensure the species' survival.

Cultivation

Coreopsis bigelovii is sometimes cultivated as an ornamental plant for its attractive flowers and ability to thrive in dry, poor soils. It is valued in water-wise gardens and naturalistic landscapes. The plant prefers full sun and well-drained soils and is relatively low maintenance, requiring minimal water once established.