-— 178 — 
: Il. Pseudo-Bruchia Kindb. 
4.T.brevicollis Hornschuch, ral 
Leaves concave subovate short-acuminate very small, nearly 
appressed when dry; costa not or scarcely excurrent.  Periche- 
tial leaves ovate-oblong more distinctly acuminate. Peristomial _ 
teeth red entire or faintly perforate. Stem very short. Tufts 
small dark green. — Earth and rocks in alp. regions r. Hur. 
Norway! Amer. »Greenl.»: Berggren. i ; 
88. Ditrichum Timm. 
A. Leaves sheathing; costa rough at back. A 
I. Trichodon. Dioecious. ; 
...B. . Leaves not sheathing; costa smooth.  Perichetial leaves 
not (exc. D. vaginans and D. homomallum) sheathing. a 
II. S:lania. Leaves carinate often covered with a glaucous 
meal. Monoecious. : 
II. Leptotrichum. Leaves not carinate. Often dioecious. 
1. Xanthopodia. Pedicel of capsule yellow. Leaves long- — 
subulate; costa long-excurrent. Monoecious or paroecious. 
. 2. Erythropodia. Pedicel finally red, Leaves often short- 
subulate. Dioecious. 
I. Trichodon Schimper. ced 
1.D.tenuifolium Schrader. — Trichostomum Schrad., Ditri- 
chum Lindberg; Trichodon cylindricus Schimper. 
Leaves abruptly narrowed to a long subulate-setaceous den- - 
ticulate by the long-excurrent costa nearly filled point, curled - 
or patent when dry; cells narrow-rectangular. Capsule smooth - 
narrow-cylindrie curved when young; teeth red papillose art - 
culate; pedicel long: yellowish or pale red. Tufts low not to- 
mentose. — Wet sand prine. in alps. Eur. Norway, Sweden, | 
Switzerl.! Austria: Breidler. Amer. Can.: Macoun. 4 
2.D.oblongum Lindberg. — Trichodon Lindb. in K. W. A. Foer- 3 
handl. (Roy. Acad. in Stockholm) 1864; Ditrichum Kindb. .  - 
i Leaves abruptly narrowed to the entire or indistinctly den- 
ticulate not long acumen, which in upper part is filled by the ee 
short-excurrent costa, not or faintly flexuous; cells short-rect — 
angular at least the upper; pedicel red short; »peristomial 
pale brown hyaline smooth indistinctly articulate»: Lindb. l ¢ 
Tufts dense but not tomentose, about 3 c. m. high when barren, 
lower when fertile. — On earth in arctic districts r. Amer. 
Greenl.: Berggren. Eur, Spetsbergen; R; Gyllencreutz. —. s 
barren speciniens are resembling Ceratodon purpureus, but leaves. 
not are revolute; in fertile ones from Spetsbergen few capsules 
are evolute (but unripe), their lids very short obtuse. 2 
