Historical clue formulations

• Producer of red-and-white blooms — 2017-04-28
• Girl in "The Music Man" with a floral name — 2014-05-10
• Belladonna lily — 2012-12-01
• Flower also called a naked lady — 2008-02-03
• Showy bloom — 2004-03-11
• Flower with a bulb — 2001-11-12
• Lilylike flower — 1999-02-01
• Popular houseplant — 1998-11-26