Sp. Pl. 2: 607. 1753.
N.S., Nfld. and Labr. (Nfld.), Que., Eurasia
Subspecies 4 (1 in the flora).
Four subspecies of Pedicularis palustris have been designated in Europe; North American material appears to be subsp. palustris.
The overall form and habit of Pedicularis palustris are very similar to those of P. pennellii. Inflorescences of both species consist of paniculate racemes, and galea margins have two sets of paired teeth, one set medial and the other distal.