  | 
         herbs; NOT [shrubs or trees]  | 
        | 
         land plants; NOT [water plants]  | 
        | 
         plants not parasitic on trees, rooted in
        soil; NOT [plants parasitic on branches of trees]  | 
        | 
         plants with more than one pair of leaves;
        NOT [plants with a single pair of large reniform leaves]  | 
        | 
         leaves alternate, lower ones sometimes
        opposite; NOT [leaves opposite]  | 
        | 
         leaves without stipules; NOT [leaves with
        stipules free or sheathing the stem]  | 
        | 
         flowers with only one floral ring, with
        sepals but not petals]  | 
        | 
         stamens and pistils in each flower; NOT
        [stamens or pistils in separate flowers on the same plant]  | 
        | 
         fruit fleshy when ripe; NOT [fruit dry
        when ripe]  |