BARNES — NORTH AMERICAN MOSSES. 191 



b. Not papillose . . D. Systilius, 111, 



2. Costa vanishing at apex or forming a short point. 



Lieaves hyaline % of their length ... D. obtusifolins, 114, 



Leaves hyaline only at base. 

 Margins revolute. 



Capsule long cylindric, leaves crenulate . . D. arenacens, 111. 



Capsule elliptic, leaves entire . . . . D. nervosus/ 113. 



Margins inflexed above D. Garberi, 112. 



B. Leaves with a pellucid border D. Porteri, 112. 



II. Capsule nodding, or pendent, or arcuate. 



Leaves with a thickened border below. 



Seta straight, capsule nodding or horizontal . D. cernuns,* 114. 



Seta reflexed, capsule pendent .... D. Laureri, 115. 



Seta flexuous, capsule arcuate ... D. camptothecius, 121. 

 Leaves without a border D. obliquns, 115. 



BARBULA, p. IIS. 



I. Leaves with jointed dichotomous filaments on the costa. 



Costa broad (i^ leaf), flattened, leaves thick, rigid §1. Aloidellee, p. 192. 

 Costa narrow, round, leaves thin, broad . §11. Chlorouotae, p. 192. 



II. Leaves not filamentose. 



Teeth from a low membrane, scarcely projecting from the 

 mouth [excl. B. brevipes]. 

 Plants small. 



Leaf cells distinct §IIT. Cuneifoliae, p. 192. 



Leaf cells small. 

 Perichaetial leaves little different from the foliage. 



§IT. Ungniculatse, p. 193. 



Perichaetial leaves long sheathing or convolute § Y. ConTolutse, p. 195. 



Plants robust [excl. B. ccespitosa]. 



Leaves entire; stems radiculose . . §VI. Tortuosae, p. 195. 



Leaves serrate, stems not radiculose . §VII. Squarrosae, p. 195. 



Teeth from a high tesselated membrane §VIII. Syntrichiae, p. 195. 



1 D. subtorquescens C. M. & Kindb. (Appendix, no. 120) appears to be identical with 

 D. nervosus B. & S. 

 ' See Appendix, no. 122. 



