June 2025

Hooker’s dryas (Dryas hookeriana)

The genus Dryas in the rose family is comprised of 15 circumboreal species characterized by saucer-shaped flowers with 8-12 white or yellow petals, evergreen leaves with round-toothed margins and dense pubescence on the underside, and clusters of dry fruits capped by persistent feathery styles. The fruiting heads bear a strong resemblance to the Truffula trees […]

Ruth’s chicken sage (Artemisia ruthiae or Sphaeromeria ruthiae)

Ruth’s chicken sage is a perennial herb in the sunflower family that is endemic to the Navajo Sandstone canyons in and near Zion National Park in southwestern Utah. It was first collected in 1935 but not recognized as a distinct taxon until the 1970s. This species usually grows in cracks and ledges high up on […]