Historical clue formulations

• Showy purple flower — 2025-11-15
• Flower whose name is Greek for "flame" — 2017-09-30
• Flower known to attract butterflies — 2016-12-16
• Jacob's-ladder, for one — 2013-12-14
• Showy flowers — 2010-11-01
• Jacob's-ladder, for one — 2008-07-30