Green’s Dictionary of Slang

1. a euph. for menstruation [prior use is SE since 15C].

[1598		Florio A Worlde of Wordes n.p.: Biancure, the monethly flowers that women haue].
1679		J. Oldham ‘Upon the Author of a Play call’d Sodom’ in Rochester Poems on Several Occasions (1680) 130: Thy Muse has got the Flow’rs, and they ascend, / As in some Green-sick Girl, at upper end.
1684		Rochester (attrib.) Sodom III v: ’Tis so with cunts’ repeated dull delights; / Sometyme theyve flowers for sauce, and sometyme theyve whites.
1787		Harris’s List of Covent-Garden Ladies 55: Her fountain, whence flows the impending flood (sometimes like chrystal, and sometimes like amber) is edged with delicate moss. The wood is shady and tufted and [...] not always destitute of flowers.
1837–8		‘Toasts And Sentiments’ in Cuckold’s Nest 48: The girl with the flowers.
c.1850		Peeping Tom (London) 1 2/2: In infancy I knew a spot, / Where flowers had never blown; / Where creeping moss had never got, / Where seed was never sown.
1870		Cythera’s Hymnal 5: They longed for a prick, but they thought of the flowers.
1882		Cremorne III 70: ‘Oh Hetty [...] look at the blood.’ ‘Why, you little fool, that’s your flowers’.
1898		‘Mary Suckit’ Yvonne 119: About a fortnight after the count’s return, my flowers declared themselves.
1925		AS I 24: The function of menstruation is described by dozens of evasive terms [...] The term ‘flowers’ is another somewhat ornamental designation.
1953		Randolph & Wilson Down in the Holler 106: Flowers is also used with reference to catamenia.
1957		in Randolph & Legman Ozark Folksongs and Folklore (1992) II 595: I told her that my sister Peg was down among the flowers.

2. (orig. US) the vulva; thus eat someone’s flowers, to perform cunnilingus.

1985		S. Berkoff West in Decadence and Other Plays (1985) 123: Make the teenyboppers moist their flowers.
2003		‘Maureen’s Lusty Confessions’ on Apartment 231 🌐 My head is spinning at the mere thought of you hungrily feasting like a famished orphan on my sushi taco. Once you are finished eating my flowers way down south in Dixie, it will be my turn to polish your old German helmet...