Another handful of rare plant accounts have been added to the Rare Plant Register this month. They are Carex extensa (Long-bracted Sedge), Cerastium arvense (Field Mouse-ear), Glaucium flavum (Yellow Horned-poppy), Ononis spinosa (Spiny Restharrow), and Polygonum oxyspermum subsp. raii (Ray’s Knotgrass) .