The Collaborative International Dictionary
Flowerless \Flow"er*less\, a. Having no flowers.
Flowerless plants, plants which have no true flowers, and produce no seeds; cryptogamous plants.
Wiktionary
a. Without flower.
Usage examples of "flowerless".
On the floors above Delivery, in flowerless rooms, women lay recovering from hysterectomies and mastectomies.
But while the Dinosaurs lorded it over the hot selvas and marshy plains and the Pterodactyls filled the forests with their flutterings and possibly with shrieks and croakings as they pursued the humming insect life of the still flowerless shrubs and trees, some less conspicuous and less abundant forms upon the margins of this abounding life were acquiring certain powers and learning certain lessons of endurance, that were to be of the utmost value to their race when at last the smiling generosity of sun and earth began to fade.