Crackles received an honorary
Doctor of Science degree from the
University of Hull in 1991, for her work on grasses of the genus
Calamagrostis. In 1966, Crackles became a fellow of the
Linnean Society of London. In 1992, Crackles was made a
Member of the Order of the British Empire (MBE) by
Queen Elizabeth II for her work in plant conservation. She was elected Honorary Life member of the
Botanical Society of Britain and Ireland in 2000. == Works ==