— 194 — 
Perichetial leaves long-aristate not emarginate. — Rocks r. Amer. 
Can, Rocky mts: Macoun. "dn 
* D.rigidum Kindb. Laubm. Schwed. u. Norw. 
Leaves acute short-acuminate rigid not undulate, nearly ap- 
pressed when dry; costa subpercurrent. Tufts nearly eradicu- 
lose, pale or whitish green when dry. Capsules unknown. — 
In bogs r. Eur. Sweden near Strcemstad: P. Olsson. m 
31.D.pallidum Bruch et Schimper.— D. sabuletorum Renauld 
et Cardot. FA 
Differs from D. Bergeri: Leaves gradually acuminate acute — 
short-subulate, often crisped when dry; cells sometimes suboblong; E 
costa pereurrent or subexcurrent. — Sandy soil r. Amer. Can: —— 
Waghorne. U. S.: Sull. et Lesq. exsicc., com. Cardot; Sawyer - 
and Green, com. Cardot. x 
b. Leaves brittle and narrow; angular celle uniform dilated — 
fugitive faintly yellowish; other basal cells long hyaline. Cap 
sule short-pedicellate. 
32.D.leueobasis C. M. et Kindb. 1. c. | 
Leaves tapering to a very long narrow nearly wholly spinu- 
lose-serrulate acute acumen, faintly undulate and crisped when a 
dry; middle cells o$ lamina gen. short. Capsule not large. — 
Resembles somewhat D. fuscescens in habit. — Base of trees - 
in woods r. Amer, Pacif. distr. Can. Brit. Col: Macoun. U. S: 
Roell. EE 
4. Scopariiformia. s 
A. Leaves rough or denticulate at back of lamina, us. er 
sped and often undulate when dry; costa sometimes excurrent. — 
33.D.elatum Lindberg. — D. robustum Blytt (the invento. — 
Leaves long, tapering to a long spinulose-serrulate brittle Ss 
acumen, dentate at back; acumen with narrow-subulate often — 
circinnate point; cells of angles diversiform, the inner narrow; - 
other cells of lower part long, the upper short irregular; costa 
very rough at back near apex, often excurrent. Capsules clu- 
stered 3—-4 not striate when wholly ripe. Plants yellowish 
green very robust ue. high. — Bogs and humid woods r. Bur. 
Norway! Sweden!; Lindberg. oe 
34.D.spurium Hedwig. vé 
Leaves gen. not long, ovate-lanceolate acute or from subovate 
base abruptly acuminate, subpapillose at back, very faintly 
serrate at the us. short acumen: cells as in the last; costà 
abbreviate or subpercurrent, faintly rough at back. Capswe 
solitary striate. Tufts yellowish green not high. — Dry heaths. 
