Hesperoyucca newberryi

In the past, habitat and subpopulations were lost during the formation of Lake Mead in the late 1930's. There are currently no evident threats to Hesperoyucca newberryi and no documentation of population decline has been undertaken. Climate change in the form of prolonged droughts is a threat to the species, possibly affecting not only seed germination but the plant's ability to flower and the abundance and behaviour of the obligate pollinator, which in turn would affect seed set in Hesperoyucca newberryi. Monitoring population size for potential decline and pollination studies are necessary to better assess threats to population stability. The combination of small overall population size, low density, monocarpic reproduction and obligate pollination potentially place this species at higher risk/higher sensitivity to potential threats.

Hesperoyucca newberryi primarily occurs in Grand Canyon National Park, Lake Mead National Recreation Area, and Hualapai and Havasupai Nations affording some level of protection.