  | 
         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]  |