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1 Flowers solitary (or in fascicles of 2-3), the pedicels 5-20 mm ; bracts subtending the calyx narrow and short, enclosing about ½ of the calyx; [section Petrorhagia]
1 Flowers in capitate inflorescences (solitary in impoverished or very young plants), the pedicels 0.1-3 mm long; bracts subtending the calyx broad and long, usually completely enclosing the calyx; [section Kohlrauschia]
..2 Leaf sheaths 1-2 mm long; petals lacking dark veins