Can be mis-identified as :
Deergrass (Trichophorum germanicum but see captions above.
Hybridises with :
Deergrass (Trichophorum germanicum) to produce
Trichophorum × foesteri which is more common than Northern Deergrass and has a similar distribution, but is sterile, with the flower spikelets falling early. Indeed, it is always possible that the above photos are of this sterile hybrid, since no wispy anthers can be espied in the photos. However, the leaf-blades can be found in the photos, and they are between 5-10 times longer than their opening (rather than the shorter 2.5-5 x longer of the hybrid), so these are indeed specimens of Northern Deergrass, and not the hybrid. Phew!
Grows in wetter places than the much taller more robust
Deergrass (Trichophorum germanicum). On wet bogs, wet moors - acid lowlands or uplands, but not on dryish peat. Leaves are basal reddish-brown sheaths. Fruit a 3-sided nut.