Erigeron neomexicanus, commonly known as New Mexico Fleabane, is a perennial herbaceous plant native to the southwestern United States. This species is a member of the Asteraceae family, which includes a vast array of flowering plants, and is distinguished by its characteristic daisy-like flower heads. The New Mexico Fleabane plays a role in its native ecosystems, contributing to the biodiversity of arid and semi-arid regions. This plant typically exhibits an erect to ascending growth habit, forming clumps that can reach heights of 30 to 60 centimeters. Its stems are slender and often branched, supporting the foliage and inflorescences. The leaves of Erigeron neomexicanus are generally basal and cauline, with basal leaves often being spatulate or oblanceolate and tapering to a petiole, while the stem leaves are typically smaller, linear to lanceolate, and sessile. The leaf margins can be entire or slightly toothed. The most striking feature of this fleabane is its numerous flower heads, which are borne singly at the tips of stems and branches. Each flower head is composed of a central disc of yellow tubular florets surrounded by ray florets that are typically white to pale lavender or pinkish, measuring about 1 to 2 centimeters in diameter. These ray florets are numerous and slender, giving the flower a delicate appearance. Following flowering, the plant produces small, achene-like fruits, each typically topped with a pappus of bristles, which aids in wind dispersal. The native range of Erigeron neomexicanus is primarily concentrated in New Mexico, with some occurrences extending into adjacent areas of Arizona and potentially Colorado. It thrives in a variety of habitats, often found in open, sunny locations such as grasslands, shrublands, rocky slopes, and disturbed areas. This species prefers well-drained soils, which can range from sandy to loamy, and is adapted to arid or semi-arid climates with moderate to low rainfall. While it is well-suited to its native environment, it can also be cultivated in gardens that mimic these conditions. For successful cultivation, it requires full sun exposure and a soil that does not retain excessive moisture. Drought tolerance is a key characteristic, making it a suitable choice for xeriscaping or water-wise gardens. Ecologically, Erigeron neomexicanus serves as a nectar source for various pollinators, including bees and butterflies, contributing to the local insect populations. Its seeds are also a food source for small birds. While not widely recognized for significant medicinal or culinary uses, its ornamental value is appreciated in native plant gardens and landscapes where its cheerful blooms add color and texture. The plant's ability to thrive in challenging conditions makes it a resilient addition to suitable garden settings, requiring minimal maintenance once established. Its adaptation to dry environments and its attractive floral display make it a noteworthy species within the flora of the American Southwest.