2. (Nat. Hist.) Not agreeing with some artificial system of classification. [ 1913 Webster ]
3. (Biol.) Not having any of the distinct systems or types of structure, as the radiate, articulate, etc., characteristic of organic nature; as, all unicellular organisms are systemless. [ 1913 Webster ]
(n)stemless perennial having large flowers with white or purple-brown florets nestled in a rosette of long spiny leaves hairy beneath; of alpine regions of southern and eastern Europe, Syn.Carlina acaulis
(n)dark green erect herb of northwestern United States and southwestern Canada having stiff leaves in dense tufts and yellow flower heads; sometimes placed in genus Haplopappus, Syn.Haplopappus acaulis, Stenotus acaulis
(n)perennial having tufted basal leaves and short leafless stalks each bearing a solitary yellow flower head; dry hillsides and plains of west central North America, Syn.Hymenoxys acaulis, Tetraneuris acaulis
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)