Bidens beckii Torr. ex Spreng.

PLANTAE EXSICCATAE GRAYANAE
499. Megalodonta Beckii (Torr.) Greene
Pittania, iv. 271 (1901) ; Britton & Brown, 111. FL ed.
2, iii. 500, fig. 4518 (1913); Feraald, Rhodora, xxiv.
207 (1922).
Syn. Bidens Beckii Torr. ex Spreng. Neue Entdeck. ii.
135 (1821) and FI. N. Y. i. 388, t. 58 (1843) ; DC. Prod,
v. 595 (1836) ; Torr. & Gray, FI. N. Am. ii. 353 (1842) ;
Gray, Man. 232 (1848) and Syn. FI. i. pt. 2,298 (1884) ;
Britton & Brown, 111. FL iii. 440, fig. 3950 (1898) ; Rob-
inson & Fernald in Gray, Man. ed. 7, 842 (1908).
Associated with Myriophyllum heterophyllum, Pon-
I tederia cordata, Potamogeton amplifolius and P. epihy-
drus, Rivière-aux-Serpents, Oka, Quebec, Canada.
Coll. F. Louis-M. Lalonde.	August 10,1931.
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