Coefficient of Conservatism:
Coefficient of Wetness:
A. A. Reznicek
Usually in the wettest parts of bogs and on sandy shores subject to periodic inundation. Preferring acidic soils, it is almost never found with D. linearis, but all four taxa were found in 1984 within 1 meter of each other in a “string bog” in north-central Luce Co.
Although in general this is a less robust species than D. anglica, with shorter scapes, measurements overlap a bit. The petioles tend to be a little longer, usually 2.5–3.5 times as long as the blades, whereas in D. anglica they are usually 1–3 times as long as the blades. On unusually healthy plants, an occasional blade may be as broad as 5 mm. In water or very wet sphagnum, the internodes often elongate, so the plant bears alternate leaves at least below a rosette. Such stem elongation apparently occurs only very rarely in D. anglica.
Rare specimens with pubescent petioles and spatulate leaf blades wider than in D. intermedia are hybrids with D. rotundifolia (D. ×beleziana Camus); specimens are known from Luce and Wexford Cos.