Are both Promenaea and Machaeranthera from North America?
Machaeranthera Machaeranthera is a genus of North American flowering plants in the daisy family which are known by the common name tansyaster.
Astraeus pteridis Astraeus pteridis is a species of false earthstar in the family Diplocystaceae. It was described by American mycologist Cornelius Lott Shear in 1902 under the name "Scleroderma pteridis". Sanford Myron Zeller transferred it to "Astraeus" in a 1948 publication. It is found in North America.