Yes, harlequin gloryblower is one of many common plants that are toxic.
Harlequin Glorybower
The harlequin was a character in Italian theatre.
Harlequin F.C. was created in 1866.
Harlequin Enterprises was created in 1949.
Harlequin Valentine was created in 2001.
Requiem for a Harlequin was created in 1970.
Harlequin beetle was created in 1758.
Harlequin Melodies was created in 1968.
Harlequin Duck was created in 1758.
Harlequin League was created in 2007.
Harlequin Air was created in 1997.
Harlequin Air ended in 2005.