In the comments, Carol asked if Gene planted the Star of Bethlehem. Up until last weekend, I thought some gardener planted it in the last 30 years while the garden was tended. I was wrong.
Janet Cook, one of our tour guides and cook extraordinaire in name and deed, shared with me her memories of volunteering in the garden in the mid-70s. The garden had essentially been neglected for almost 50 years. It was overgrown with weeds and brambles. The stone edgings around the beds were found buried in the soil. Janet said, "Oh, how I hated the Star of Bethlehem even then." So this leads to the conclusion that it was very likely planted by Gene.
Now I know I am fighting an invasive bulb that has had its own way for 80 years. Puts the battle into perspective! I am definitely the underdog now, but am determined to win this war.