Machaeranthera tanacetifolia

Machaeranthera tanacetifolia 001

Machaeranthera tanacetifolia is a species of flowering plant in the Asteraceae family, commonly known as the tansy-leaf tansyaster. This plant is native to the United States, where it is found primarily in the southwestern states, including Texas, New Mexico, and Arizona, extending into Mexico. It thrives in a variety of habitats, from desert plains to mountainous areas, showcasing its adaptability to different environmental conditions.

Description

Machaeranthera tanacetifolia is a perennial herb that can grow to a height of 30 to 100 cm. Its stems are erect, often branched, and covered in small, glandular hairs. The leaves are lanceolate to narrowly ovate, resembling the leaves of the tansy, hence the common name. They are arranged alternately along the stem, with edges that can be smooth or slightly toothed.

The flowers of Machaeranthera tanacetifolia are its most striking feature. They are composite flowers, typical of the Asteraceae family, with a central disc of purple or yellow florets surrounded by a ring of lavender to violet ray florets. These blooms are usually present from late summer to fall, attracting a variety of pollinators including bees and butterflies.

Ecology

Machaeranthera tanacetifolia plays a significant role in its ecosystem. It serves as a nectar source for pollinators and can be used in the restoration of disturbed sites, such as those affected by construction or overgrazing. Its ability to thrive in poor soil conditions makes it an excellent candidate for erosion control and xeriscaping.

Cultivation

While not widely cultivated, Machaeranthera tanacetifolia can be grown in gardens that aim to feature native plants or create a wildflower meadow. It prefers full sun and well-drained soil, tolerating drought, heat, and poor soil conditions well. Seeds can be sown directly into the ground in fall or spring. Minimal care is required once established, making it a low-maintenance choice for gardeners interested in promoting native flora.

Conservation

As of the current knowledge, Machaeranthera tanacetifolia does not face any immediate threats that would warrant conservation concern. However, like many native plants, its habitat is susceptible to human activities such as urban development, agriculture, and climate change. Efforts to preserve its natural habitats are essential for maintaining biodiversity and the health of ecosystems where this species occurs.