21. It is particularly common in Rosaceae and Poaceae, where it occurs in many different genera and species. 22. It is placed in the genus " Exochorda " and family Rosaceae , the rose family. 23. Over a dozen different Rosaceae genera, both extant and extinct, have been identified in the formation. 24. The Church garden is organised following a taxonomic approach, featuring only plants belonging to the Rosaceae family. 25. The subfamily "'Spiraeoideae "'was traditionally a subfamily of flowering plants within family Rosaceae . 26. Like many other genera in the Rosaceae tribe Maleae, toyon includes some cultivars that are susceptible to fireblight. 27. "' Sanguisorbinae "'is a subtribe of flowering plants in the rose family, Rosaceae . 28. The apple is the pomaceous fruit of the apple tree, species Malus domestica in the rose family Rosaceae . 29. This deciduous plant belongs to the rose family Rosaceae , and is found mainly in the central United States. 30. Onagraceae and Rosaceae ( mainly " Rubus " ) are the dominant host plant families for Holarctic species.
