DICRANACEAE 3 1 



6 — Capsules clustered Drummondii 



Capsules solitary 7 



7 — Costa not reaching apex, smooth at back Bergeri 



Costa percurrent or excurrent, roughened 8 



8 — Leaves strongly falcate secund and crispate, upper leaf cells regular. 



fuscescens 

 Leaves little or not at all secund, upper leaf cells very irregular. 



pallidum 



9 — Costa ending in the serrulate apex; leaves crisped when dry 10 



Costa excurrent; leaves scarcely altered by drying II 



10 — Apex of leaf papillose at back; upper leaf-cells rectangular. . .montanum 

 Apex of leaf not papillose; upper leaf-cells less regular; plants com- 

 monly giving off numerous axillary erect flagella bearing minute 



ecostate leaves flagellare 



II — Costa equaling Yz width of leaf at the base, or less; leaves gradually 



narrowed to apex; all upper surface leaf-cells rectangular fulvum 



Costa J4 width of base of leaf, or more; leaves abruptly narrowed to 

 a long slender point; all upper leaf -cells greatly elongated-linear. 



longifolium 



D. Bergeri Bland. Yonkers, E. C. Howe, Bx!; Bedford, 

 Westchester Co., E. G. B. Bx!; "Swamps and wet woods, 

 common in N. J.," Muse. App. 93. 



D. Bonjeani DeNot. Swampy woods on New Jersey Pali- 

 sades opposite Yonkers!!; Englewood, N. J., P. C. Clarke. Late 

 summer or autumn. 



D. Drummondii Muell. Orient, Latham!!; Fairfield, Ct., 

 Nichols, Bx!; "Shaded pine woods." T. P. James. Geol. Surv. 

 N. J. Summer. 



D. flagellare Hedw. Very common on banks of streams and 

 on hummocks in swampy woods. Summer. More variable 

 than is indicated in most descriptions. An extreme form is 



Var. minutissimum Grout, on dry peaty banks and stems of 

 bushes forming a sort of close dense " fur." Leaves short, ovate- 

 lanceolate, broad pointed. 



D. fulvum Hook, [including D. viride (S. & L.) Lindb.]. 

 Flushing, Brainerd (H. S.); Orient, Latham!!; Oyster Bay!!; 

 Yonkers!!; Rocks, Closter, N. J., Austin, Bx!; Bedford and 

 Bronx Park, Bx! l T sually growing on rocks in damp shaded 

 places. Late summer and autumn. 



