*Alyssum alyssoides L. YELLOW ALYSSUM. (As Alyssum calycinum)
"Brock's Monument," Clinton 1864. (As Alyssum calycinum)
Brock's Monument, Canada, 1863: D. F. Day & G. W. C. [George W. Clinton]
(Regent 1865 p. 203). Ontario: (as A. calicinum) "Very
abundant around Brock's Monument, Queenston Heights, Ont., 1882 (Macoun)"
Macoun (1883). (As Alyssum calycinum) L.) "near Brock's
Monument, Ontario," Day (1888). Ontario, Niagara Park System (as A.
calycinum), Cameron (1895). Ontario: Queenston Heights, Wm. Scott, July
6, 1882 (6138); May 25, 1896 (6136); Niagara Glen, T. J. Ivey, July 8, 1908
(6649), Heimburger (1955). "Ontario: gorge of River at Niagara Glen (1916)
(Johnson); very abundant around Brock's Monument, Queenston Heights (Macoun,
Cat. of Can. Pl.)," Zenkert (1934). "... has been reported from near
Queenston Heights, but has not been recently located," Hamilton (1943).
Ontario: Brock's Monument,
Clinton, late 1800's (BUF); Queen Victoria Park, Cameron, 1890 (NFO).
Reported as rare in the Niagara Frontier
Region by Zander and Pierce (1979).