It is impossible to tell Microseris lanceolata and Microseris walteri apart from leaves or flowers, only from roots and seeds. https://vicflora.rbg.vic.gov.au/flora/key/2684 The rule of thumb in CNM is to call naturally occurring plants walteri if they are growing under about 1000 m altitude. However, if this is planted, you will have to wait till it seeds to make a definite ID.