Stemless :: Stem-clasping (a.) Embracing the stem with its base; amplexicaul; as a leaf or petiole.
Stemlet :: Stemless (a.) Having no stem; (Bot.) acaulescent.
Systemless :: Systemizer (n.) One who systemizes, or reduces to system; a systematizer..
Systemless :: Systemless (a.) Not agreeing with some artificial system of classification.