'anomalous-flowered' is a compound of 'anomalous' + 'flowered'. 'anomalous' originates from Greek, specifically the word 'anomālos', where the prefix 'a-' meant 'not' and the root 'nomos' (via forms) implied 'law' or 'regularity'. 'flowered' comes from 'flower', ultimately from Latin 'flōs' meaning 'flower'.

'anomalous' passed from Greek 'anomālos' into Latin as 'anomalus' and then into Middle English as 'anomalous'. 'flower' came into English via Old French 'flor' from Latin 'flōs', evolving in Middle English to 'flour/flower' and forming adjectival '-ed' as in 'flowered' to mean 'having flowers'. The compound 'anomalous-flowered' is a modern descriptive formation combining these elements.

Initially, 'anomalous' meant 'not according to rule' and 'flowered' simply 'having flowers'; together the compound now specifically denotes 'having flowers that deviate from the normal form or arrangement'.