Polygonatum × hybridum Brügger, Jahresber. Naturf. Ges. Graubündens, n.s., 29: 160 (1884-1885 publ. 1886) (syn: Convallaria × intermedia Boenn.; Polygonatum × intermedium (Boenn.) Brügger; Polygonatum × mixtum K.Richt.; Polygonatum multiflorum subsp. intermedium (Boenn.) K.Richt.);
Europe: Belgium, France, Germany, Great Britain, Ireland, Spain, Switzerland; Introduced into: New Zealand South as per POWO;
Polygonatum biflorum from Tahoe, California-GS26062022-2: 4 very high res. images.
Polygonatum biflorum photographed from Tahoe, California, 5-8-2017.
I assume this was cultivated in Tahoe? Polygonatum biflorum is not native out there. I would guess this is probably P. X hybridum which is a hybrid between P. odoratum and P. multiflorum found in Europe where the two co-occur. Forms of it are widely cultivated, and most forms are usually sterile.