[4] One population of the plant occurs at Rogue Valley International-Medford Airport, where soil has been deposited over hardpan such that conditions are similar to vernal pool margins, allowing it to take hold there.

[4] Other plants that can be found in the vernal pool and floodplain habitat types include Limnanthes floccosa (woolly meadowfoam), Alopecurus geniculatus (water foxtail), Deschampsia danthonioides (annual hairgrass), Danthonia californica (California oatgrass), Poa scabrella (pine bluegrass), and Brodiaea spp.

[2] Land not directly destroyed has been altered in such a way that its hydrology no longer supports vernal pool ecosystems.

[2] The blacktop of roads and parking lots produces runoff, and irrigation and ditches distribute water differently.

[2] Additionally, habitat fragmentation has occurred as the land was sectioned for use and bisected by roads and other structures.