[6] Common grasses include bluebunch wheatgrass (Agropyron spicatum), sand dropseed (Sporobolus cryptandrus), and pine bluegrass (Poa secunda).

Conservation efforts and the discovery of additional populations led to a more optimistic outlook for the plant and its status was downlisted to threatened in 1996.

Most all of the populations are on land that has been heavily grazed by domestic cattle and sheep, and trampling and predation by the animals can adversely affect the plant.

[7] The ecosystem is negatively impacted by introduced species of plants, including cheat grass (Bromus tectorum), St. John's wort (Hypericum perforatum), field bindweed (Convolvulus arvensis), Dalmatian toadflax (Linaria genistifolia ssp.

[7] The three-toed stem-boring weevil (Mecinus janthinus) has been released into four o'clock habitat that is infested with dalmatian toadflax to act as an agent of biological pest control against the weed.

[8] While the four o'clock generally survives wildfire due to its large underground rhizome, fires increase the number of non-native plants growing in the area.