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Adj.1.petalless - (of flowers) having no petals
References in periodicals archive ?
And the next, in a voice as sharp as a petalless rose.
When the coming of spring is still a hopeful thought, and the outcome of the groundhog's appearance awaits indication, the russet downy buds of Slippery Elm unfold inconspicuous petalless blooms, then set mature seeds, before most trees leaf out.