Species: Pyrrocoma liatriformis

Little is known about the autecology of Haplopappus liatriformis. It is native to late seral or climax Palouse Prairie and mesic canyon grassland communities and transition zones between grassland and forested habitats. Plants can be locally common, but H. liatriformis is not a community dominant. The major natural disturbance at H. liatriformis sites is fire. Daubenmire suggests these grassland sites return to their pre-fire condition within a few years. The major anthropogenic-related disturbance besides outright conversion, is grazing. Poa pratensis is a common invader within the Festuca idahoensis habitat types following intensive grazing. Daubenmire found that once invasion has occurred, no amount of relief from grazing reverses this trend. H. liatriformis does occur in areas which have undergone moderate grazing pressure, but generally is absent from places more heavily grazed. Similarly, it can tolerate moderate levels of non-native species invasion, but seems to decrease as these weeds increase. There are a few cases of H. liatriformis occurring in roadcuts or overgrown roadbeds. Competition with invasive weedy species appears to adversely effect H. liatriformis (Gamon 1991). Grasshopper herbivory and insect seed predation have been noted. Reproductive losses incurred due to these pests are likely more important than prior to the species' widespread habitat loss and degradation.