Kate Spade New York is rumoured to have landed itself in a US$1m lawsuit over its floral-print dresses.

Executives who control the work of late artist Vera Neumann claimed Kate Spade "obviously copied" Neumann's 1979 classic Poppy Field design, according to the New York Post. The filing claims Spade publicly acknowledged items that have inspired her designs include the artist's silk-screened scarves.

The lawsuit was filed at a Manhattan federal court on Tuesday, the report added.

Kate Spade could not be reached for comment.