1. Petrified cones of the genus Calamoslachys from the Carboniferous of Illinois;Arnold C. A.;Contr. Mus. Paleo. Univ. Mich.,1958
2. A PALAEOSTACHYA FROM THE PENNSYLVANIAN OF KANSAS
3. On a seed‐bearing Annularia and on Annularia foliage;Elias M. K.;Kans. Sci. Bull.,1931
4. The anatomy of Palaeoslachya vera.;Hickling G.;Ann. Bot.,1907