First glume 1-nerved, up to 2.6 mm long. Second glume usually 3- nerved, up to 2.9 mm long. Lemmas firm, obtuse, 5-nerved, glabrous except for webbed base, up to 3.2 mm long. Moisture conditions range from damp to dry. However, this condition has not been reported for P. languida.
Constant temperatures inhibit germination.
Generally the species occurs in small populations and many of them probably have been overlooked by botanists. The major threat is elimination of the habitat for development. Fortunately most of the sites are in comparatively rural areas of Sussex and Warren counties. Disturbances that would enhance the growth of competing species also are a threat. Forest tracts with few introduced weedy species should be protected.