722 353. Poly trichum. 14*. MUSCI. Pl.cell.fol: 
(3. Dicltsoni. Pedicetts very short ; stems branched. 
Poly trichum Dicksoni, Turner M. Heb. 90; Engl. Bo t. 1605. 
y nanum. Stem short; capsules nearly upright, almost 
globular. 
Polytrichum capsulis subrotundis, calyptra quasi lacerft coronatis, Raii 
Syn. 91,3. 
Poly trichum nanum, Hedw. Crypt . 1,13; Engl. Bot. 1625. 
Polytrichum subrotundum, Menzies in T. L. S. 4, 69 ; Engl. Bot. 1624. 
Polytrichum pumilum, Swartz M. Suec. 9, 19. 
XII. 354. CINCLIDOTUS. Pal. de Beauvois. Net-tooth. 
Capsule valveless, pedicelled ; pedicells terminal ; peri- 
stome single, toothed; teeth 32, threadlike, twisted, anas- 
tomosing at the bottom ; calyptra mitreshape. — Fruit on 
such short branches as scarcely to leave room for more 
than the perichetial leaves. 
Cinclidotus fontinaloides. Fontinalislike net-tooth . 
Fontinalis minor, foliis triangularibus minus complicatis, capitulis in 
summis ramulis sessilis, Dillen.in Raii Syn. 79,2. 
Fontinalis minor, Lin. S. P . 1571 ; Engl. Bot. 557. 
Trichostomum fontinaloides, Hedw. Crypt. 3,36. 
Cinclidotus fontinaloides, Beauv. Prod. JEth. 28. 
On stones and wood in rivers ; perennial ; May to Aug. 
XIII. 355. TORTULA. Hedwig. Screw-moss. 
Capsule valveless, pedicelled ; pedicell terminal ; peristome 
single, toothed; teeth 32, threadlike, twisted, united at 
bottom by a tubelike membrane; calyptra halved. 
1. Tortula riqida. Stiff screw-moss. 
Stem scarcely any; leaves spread open, oblong, stiff; 
edge much turned in, main rib broad; capsule oblong; 
lid conical, pointed. 
Bryum acaulon, ericas tenuifoliae Gerardi folio, Dillen Muse, 388. 
Tortula rigida, Swartz M. Suec. 40. 
Barbula rigida, Hedw. Crypt. 1,65, 
Bryum rigidum, Huds. Angl. 477 ; Engl. Bot. 180. 
On rocks, clay-banks, and chalk-cliffs. 
2. Tortula muralis. Wall screw-moss . 
Stem short; leaves spread open, linear, oblong; edge 
turned over; main rib produced beyond the leaf into a 
white hairlike point; capsule oblong ; lid conical, pointed. 
