Long, thin, sharp, stinging bristles cover the buds, leaves and stems of eucnide urens
, the desert rock nettle. The plant forms sizeable clumps, staying fairly close to the ground, with flowers creating dense clusters along the upper few inches of the stems; mature specimens may have hundreds of blooms. Each flower is up to 2 inches across, composed of five white or pale cream petals, slightly darker at the base, centered on a cluster of up to 50 white stamens around a white style, similar in length. Anthers are shorter than the filaments.
Plants often retain clusters of dead, light brown leaves and stems from previous years. The flowers are a favored food of desert bighorn sheep, despite the stinging hairs just underneath.