Historical clue formulations

• Yellow primrose — 2024-07-30
• Yellow primrose — 2023-04-25
• Wildflower of the primrose family — 2018-12-14
• Yellow-flowered primrose — 2016-03-26
• Variety of primrose — 2015-05-03
• Yellow primrose — 2008-10-24
• Primrose family member — 2007-10-23
• Yellow spring flower — 2007-07-12
• Yellow bloomer — 2007-03-09
• Variety of primrose — 2003-09-01
• Flower of the primrose family — 1999-11-02