|A dried specimen of Barbula indica,
showing the leaves twisted around the
stems. (from Merner s.n. 20 Sep 1970,
|A piece of limestone with Barbula indica and Hyophiladelphus agraria (with orange capsule stalks near the top) From Newberry s.n. 25 Feb 1971, USF.
The family Pottiaceae, at least in central Florida, can be recognized by its upright, radially symmetrical shoots, with papillose leaves, and most often occurring on limestone. Other central Florida genera in the Pottiaceae include Weissia, which has short, rosette-like leafy shoots with narrow, sword-shaped leaves that are strongly inrolled at the edges, and capsule teeth that are short and straight. It is also more likely found on soil. Hyophiladelphus occurs also on limestone rocks, sometimes mixed with Barbula, and also has long twisted teeth around the opening of the capsule, but has short, rosette-like shoots, and leaves that are only rarely papillose. Tortella is also similar but the leaves have a very distinctive V-shaped pattern of clear basal cells.