|  | plants perennial with fibrous roots,
        often with rhizomes or stolons, but lacking a taproot; NOT [plants
        perennial with taproot, or low spreading annuals] | 
      |  | plants often stoloniferous; NOT [plants
        rhizomatous but lacking stolons] | 
      |  | juice watery; NOT [plants with a milky or
        sticky sap] | 
      |  | plants more or less white-woolly; NOT
        [plants not at all white-woolly] | 
      |  | low plants; NOT [tall plants] | 
      |  | leaves mostly basal, with stem leaves
        reduced; NOT [stems leafy] | 
      |  | basal leaves generally forming a
        persistent tuft or rosette, stem seldom very leafy; NOT [basal leaves
        soon deciduous, not markedly larger than the numerous well-developed
        cauline leaves] | 
      |  | basal leaves, if any, not cordate or
        sagittate; NOT [basal leaves cordate or sagittate] | 
      |  | receptacle naked; NOT [receptacle densely
        bristly] | 
      |  | bracts of involucre dry, parchmenty or
        membranous, not green; NOT [bracts of involucre not dry or parchmenty,
        usually green] | 
      |  | involucral bracts mostly with dry,
        scarious, thin, white to yellowish or brownish tips]; NOT [involucral
        bracts not markedly scarious at the tip] | 
      |  | flower heads with all florets tubular | 
      |  | no fertile bisexual florets; NOT [some
        florets bisexual] | 
      |  | heads strictly dioecious, the heads
        wholly staminate or pistillate; NOT [pistillate heads commonly with a
        few central staminate flowers], NOT [heads all with outer pistillate
        flowers and central perfect flowers] | 
      |  | male and female florets on separate
        plants; NOT [both male and female florets on same plant] | 
      |  | stamens united to form a tube around the
        pistil | 
      |  | pappus of capillary bristles, sometimes
        plumose; NOT [pappus of scales, or of awns, or a crown, or none] |