Entireleaf Western Daisy

Astranthium integrifolium ssp. integrifolium, commonly known as the Entireleaf Western Daisy, is a perennial herbaceous plant native to the western United States, particularly found in regions such as the Rocky Mountains and surrounding foothills. Its distribution spans from Montana to New Mexico, thriving in a variety of habitats including open meadows, grasslands, and disturbed areas. The species typically exhibits a growth habit characterized by a height ranging from 15 to 30 centimeters, forming a clumping or rosette-like structure that allows it to efficiently utilize available resources.

The Entireleaf Western Daisy is notable for its distinctive leaves and flowers. The leaves are simple, entire, and lanceolate, often measuring between 5 to 15 centimeters in length, with a smooth margin and a somewhat glaucous surface. Flowering occurs from late spring to early summer, producing solitary or clustered flower heads that are composed of numerous white to pale yellow ray florets surrounding a central disc of yellow disc florets. The fruit is a small achene, which is dispersed by wind or water, facilitating its spread across suitable habitats. This species plays an important ecological role by providing nectar and pollen for various pollinators, including bees and butterflies, thus contributing to local biodiversity.

Adaptations of Astranthium integrifolium ssp. integrifolium include its ability to thrive in well-drained soils and its resilience to varying moisture levels, which is advantageous in its native range where conditions can fluctuate significantly. The plant’s growth form allows it to withstand grazing pressures from herbivores, while its flowering strategy ensures that it can attract pollinators efficiently during its blooming period. Overall, the Entireleaf Western Daisy is an important component of its ecosystem, supporting both wildlife and human interests, such as ornamental gardening and restoration projects in native plant landscapes.